HDF5 file, superblock version 2
group /
	attribute Conventions = "CF-1.8, ACDD-1.3"
	attribute acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute citation = "Petäjä, T., Petri, K., ACTRIS, EMEP, GAW-WDCRG, 2026, Nitrogen_monoxide at Hyytiälä, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/HHMT-99PE"
	attribute contributor_name = "Keronen Petri, Derek Hageman"
	attribute contributor_role = "data submitter, data submitter"
	attribute creator_email = "tuukka.petaja@helsinki.fi, petri.keronen@helsinki.fi"
	attribute creator_institution = "\"University of Helsinki, Institute for Atmospheric and Earth System Research, UHEL\", \"University of Helsinki, Institute for Atmospheric and Earth System Research (INAR), UHEL\""
	attribute creator_name = "Tuukka Petäjä, Keronen Petri"
	attribute creator_type = "person"
	attribute date_created = "2026-08-24T12:22:44.572011Z"
	attribute date_metadata_modified = "2026-08-24T12:12:26Z"
	attribute doi = "https://doi.org/10.48597/HHMT-99PE"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_citation = "Petäjä, T., Petri, K., ACTRIS, EMEP, GAW-WDCRG, 2026, Nitrogen_monoxide at Hyytiälä, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/HHMT-99PE"
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_contains_doi = "https://doi.org/10.48597/HHMT-99PE"
	attribute ebas_data_definition = "EBAS_1.1"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_export_filter = "exclude-900,exclude-invalid"
	attribute ebas_export_state = "2026-08-24T12:22:44.572011Z"
	attribute ebas_file_creation = "2026-08-24T13:36:23.165616Z"
	attribute ebas_file_name = "HHMT-99PE.nc"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_period_code = "3y"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_represents_doi = "https://doi.org/10.48597/HHMT-99PE"
	attribute ebas_resolution_code = "1h"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_set_type_code = "TI"
	attribute ebas_startdate = "2023-01-01T00:00:00.000000Z"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_timezone = "UTC"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute featureType = "timeSeries"
	attribute geospatial_bounds = "POINT Z (24.283333 61.85 181)"
	attribute geospatial_bounds_crs = "EPSG:4979"
	attribute geospatial_lat_max = 61.85
	attribute geospatial_lat_min = 61.85
	attribute geospatial_lon_max = 24.283333
	attribute geospatial_lon_min = 24.283333
	attribute geospatial_vertical_max = 181.0
	attribute geospatial_vertical_min = 181.0
	attribute geospatial_vertical_positive = "up"
	attribute id = "HHMT-99PE.nc"
	attribute institution = "FI03L \"University of Helsinki\" UHEL \"Institute for Atmospheric and Earth System Research (INAR)\" \"PO BOX 64\" FI-00014 \"University of Helsinki\" Finland"
	attribute keywords = "Hyytiälä FI0050R nitrogen_monoxide air ACTRIS EMEP GAW-WDCRG mole_fraction_of_nitrogen_monoxide_in_air mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air"
	attribute license = "https://creativecommons.org/licenses/by/4.0/"
	attribute naming_authority = "no.nilu.ebas"
	attribute processing_level = "2: final (Physical parameters, aggregated (if needed), info on variability recommended, quality assured by human inspection. This is the typical EBAS data level meant for dissemination and long term preservation.)"
	attribute project = "ACTRIS, EMEP, GAW-WDCRG"
	attribute publisher_email = "ebas@nilu.no"
	attribute publisher_institution = "NILU - Norwegian Institute for Air Research, ATMOS, EBAS"
	attribute publisher_name = "NILU - Norwegian Institute for Air Research, ATMOS, EBAS"
	attribute publisher_type = "institution"
	attribute publisher_url = "http://ebas.nilu.no/"
	attribute source = "surface observation"
	attribute summary = "Nitrogen_monoxide at Hyytiälä. These measurements are gathered as a part of the following projects ACTRIS, EMEP, GAW-WDCRG and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['nitrogen_monoxide in air (mole_fraction_of_nitrogen_monoxide_in_air)', 'nitrogen_monoxide in air (mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air)']"
	attribute time_coverage_duration = "P0002-11-30T23:00:00"
	attribute time_coverage_end = "2025-12-31T23:00:00Z"
	attribute time_coverage_resolution = "P0000-00-00T01:00:00"
	attribute time_coverage_start = "2023-01-01T00:00:00Z"
	attribute timezone = "UTC"
	attribute title = "Nitrogen_monoxide at Hyytiälä"
dataset /meta_nitrogen_monoxide_nmol_per_mol_ExpUnc2s: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_nmol_per_mol_amean: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_nmol_per_mol_det_lim: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_nmol_per_mol_perc8413: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_nmol_per_mol_prec1587: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_nmol_per_mol_precision: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_nmol_per_mol_stddev: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_ug_N_per_m3_ExpUnc2s: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_ug_N_per_m3_amean: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_ug_N_per_m3_det_lim: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_ug_N_per_m3_perc8413: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_ug_N_per_m3_prec1587: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_ug_N_per_m3_precision: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_nitrogen_monoxide_ug_N_per_m3_stddev: string, shape (3)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /metadata_time: float64, shape (3)
	attribute axis = "T"
	attribute bounds = "metadata_time_bnds"
	attribute calendar = "standard"
	attribute long_name = "time of ebas metadata intervals"
	attribute standard_name = "time"
	attribute units = "days since 1900-01-01T00:00:00Z"
// metadata_time: first 45041.75, last 45838.479166666664, count 3
dataset /metadata_time_bnds: float64, shape (3, 2)
	attribute long_name = "time bounds for ebas metadata intervals"
dataset /qc_nitrogen_monoxide_nmol_per_mol_ExpUnc2s: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_nmol_per_mol_ExpUnc2s_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_nmol_per_mol_amean: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_nmol_per_mol_amean_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_nmol_per_mol_det_lim: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_nmol_per_mol_det_lim_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_nmol_per_mol_perc8413: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_nmol_per_mol_perc8413_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_nmol_per_mol_prec1587: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_nmol_per_mol_prec1587_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_nmol_per_mol_precision: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_nmol_per_mol_precision_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_nmol_per_mol_stddev: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_nmol_per_mol_stddev_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_ug_N_per_m3_ExpUnc2s: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_ug_N_per_m3_ExpUnc2s_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_ug_N_per_m3_amean: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_ug_N_per_m3_amean_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_ug_N_per_m3_det_lim: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_ug_N_per_m3_det_lim_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_ug_N_per_m3_perc8413: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_ug_N_per_m3_perc8413_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_ug_N_per_m3_prec1587: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_ug_N_per_m3_prec1587_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_ug_N_per_m3_precision: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_ug_N_per_m3_precision_flags: float32, shape (1)
dataset /qc_nitrogen_monoxide_ug_N_per_m3_stddev: int32, shape (1, 23146)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_nitrogen_monoxide_ug_N_per_m3_stddev_flags: float32, shape (1)
dataset /tbnds: float32, shape (2)
dataset /time: float64, shape (23146)
	attribute axis = "T"
	attribute bounds = "time_bnds"
	attribute calendar = "standard"
	attribute long_name = "time of measurement"
	attribute standard_name = "time"
	attribute units = "days since 1900-01-01T00:00:00Z"
// time: first 44925.020833333336, last 46020.9375, count 23146
dataset /time_bnds: float64, shape (23146, 2)
	attribute long_name = "time bounds for measurement"
dataset /v_nitrogen_monoxide_nmol_per_mol_ExpUnc2s: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide amount fraction"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxideamountfraction"
	attribute ancillary_variables = "qc_nitrogen_monoxide_nmol_per_mol_ExpUnc2s meta_nitrogen_monoxide_nmol_per_mol_ExpUnc2s"
	attribute cell_methods = "time: expanded uncertainty 2sigma"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "expanded uncertainty 2sigma"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "nmol/mol"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mole_fraction_of_nitrogen_monoxide_in_air"
	attribute units = "nmol/mol"
dataset /v_nitrogen_monoxide_nmol_per_mol_amean: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide amount fraction"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxideamountfraction"
	attribute ancillary_variables = "qc_nitrogen_monoxide_nmol_per_mol_amean meta_nitrogen_monoxide_nmol_per_mol_amean"
	attribute cell_methods = "time: mean"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_calibration_scale = "NPL"
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "arithmetic mean"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "nmol/mol"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mole_fraction_of_nitrogen_monoxide_in_air"
	attribute units = "nmol/mol"
dataset /v_nitrogen_monoxide_nmol_per_mol_det_lim: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide amount fraction"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxideamountfraction"
	attribute ancillary_variables = "qc_nitrogen_monoxide_nmol_per_mol_det_lim meta_nitrogen_monoxide_nmol_per_mol_det_lim"
	attribute cell_methods = "time: detection limit"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "detection limit"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "nmol/mol"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mole_fraction_of_nitrogen_monoxide_in_air"
	attribute units = "nmol/mol"
dataset /v_nitrogen_monoxide_nmol_per_mol_perc8413: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide amount fraction"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxideamountfraction"
	attribute ancillary_variables = "qc_nitrogen_monoxide_nmol_per_mol_perc8413 meta_nitrogen_monoxide_nmol_per_mol_perc8413"
	attribute cell_methods = "time: percentile:84.13"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "percentile:84.13"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "nmol/mol"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mole_fraction_of_nitrogen_monoxide_in_air"
	attribute units = "nmol/mol"
dataset /v_nitrogen_monoxide_nmol_per_mol_prec1587: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide amount fraction"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxideamountfraction"
	attribute ancillary_variables = "qc_nitrogen_monoxide_nmol_per_mol_prec1587 meta_nitrogen_monoxide_nmol_per_mol_prec1587"
	attribute cell_methods = "time: percentile:15.87"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "percentile:15.87"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "nmol/mol"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mole_fraction_of_nitrogen_monoxide_in_air"
	attribute units = "nmol/mol"
dataset /v_nitrogen_monoxide_nmol_per_mol_precision: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide amount fraction"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxideamountfraction"
	attribute ancillary_variables = "qc_nitrogen_monoxide_nmol_per_mol_precision meta_nitrogen_monoxide_nmol_per_mol_precision"
	attribute cell_methods = "time: precision"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "precision"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "nmol/mol"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mole_fraction_of_nitrogen_monoxide_in_air"
	attribute units = "nmol/mol"
dataset /v_nitrogen_monoxide_nmol_per_mol_stddev: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide amount fraction"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxideamountfraction"
	attribute ancillary_variables = "qc_nitrogen_monoxide_nmol_per_mol_stddev meta_nitrogen_monoxide_nmol_per_mol_stddev"
	attribute cell_methods = "time: standard_deviation"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "stddev"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "nmol/mol"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mole_fraction_of_nitrogen_monoxide_in_air"
	attribute units = "nmol/mol"
dataset /v_nitrogen_monoxide_ug_N_per_m3_ExpUnc2s: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_constraints_preferred_term = "expressed as nitrogen"
	attribute actris_constraints_uri = "https://vocabulary.actris.nilu.no/actris_vocab/expressedasnitrogen"
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide mass concentration"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxidemassconcentration"
	attribute ancillary_variables = "qc_nitrogen_monoxide_ug_N_per_m3_ExpUnc2s meta_nitrogen_monoxide_ug_N_per_m3_ExpUnc2s"
	attribute cell_methods = "time: expanded uncertainty 2sigma"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "expanded uncertainty 2sigma"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "ug N/m3"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air"
	attribute units = "ug/m3"
dataset /v_nitrogen_monoxide_ug_N_per_m3_amean: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_constraints_preferred_term = "expressed as nitrogen"
	attribute actris_constraints_uri = "https://vocabulary.actris.nilu.no/actris_vocab/expressedasnitrogen"
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide mass concentration"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxidemassconcentration"
	attribute ancillary_variables = "qc_nitrogen_monoxide_ug_N_per_m3_amean meta_nitrogen_monoxide_ug_N_per_m3_amean"
	attribute cell_methods = "time: mean"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_calibration_scale = "NPL"
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "arithmetic mean"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "ug N/m3"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air"
	attribute units = "ug/m3"
dataset /v_nitrogen_monoxide_ug_N_per_m3_det_lim: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_constraints_preferred_term = "expressed as nitrogen"
	attribute actris_constraints_uri = "https://vocabulary.actris.nilu.no/actris_vocab/expressedasnitrogen"
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide mass concentration"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxidemassconcentration"
	attribute ancillary_variables = "qc_nitrogen_monoxide_ug_N_per_m3_det_lim meta_nitrogen_monoxide_ug_N_per_m3_det_lim"
	attribute cell_methods = "time: detection limit"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "detection limit"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "ug N/m3"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air"
	attribute units = "ug/m3"
dataset /v_nitrogen_monoxide_ug_N_per_m3_perc8413: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_constraints_preferred_term = "expressed as nitrogen"
	attribute actris_constraints_uri = "https://vocabulary.actris.nilu.no/actris_vocab/expressedasnitrogen"
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide mass concentration"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxidemassconcentration"
	attribute ancillary_variables = "qc_nitrogen_monoxide_ug_N_per_m3_perc8413 meta_nitrogen_monoxide_ug_N_per_m3_perc8413"
	attribute cell_methods = "time: percentile:84.13"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "percentile:84.13"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "ug N/m3"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air"
	attribute units = "ug/m3"
dataset /v_nitrogen_monoxide_ug_N_per_m3_prec1587: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_constraints_preferred_term = "expressed as nitrogen"
	attribute actris_constraints_uri = "https://vocabulary.actris.nilu.no/actris_vocab/expressedasnitrogen"
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide mass concentration"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxidemassconcentration"
	attribute ancillary_variables = "qc_nitrogen_monoxide_ug_N_per_m3_prec1587 meta_nitrogen_monoxide_ug_N_per_m3_prec1587"
	attribute cell_methods = "time: percentile:15.87"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "percentile:15.87"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "ug N/m3"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air"
	attribute units = "ug/m3"
dataset /v_nitrogen_monoxide_ug_N_per_m3_precision: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_constraints_preferred_term = "expressed as nitrogen"
	attribute actris_constraints_uri = "https://vocabulary.actris.nilu.no/actris_vocab/expressedasnitrogen"
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide mass concentration"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxidemassconcentration"
	attribute ancillary_variables = "qc_nitrogen_monoxide_ug_N_per_m3_precision meta_nitrogen_monoxide_ug_N_per_m3_precision"
	attribute cell_methods = "time: precision"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "precision"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "ug N/m3"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air"
	attribute units = "ug/m3"
dataset /v_nitrogen_monoxide_ug_N_per_m3_stddev: float64, shape (23146)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_constraints_preferred_term = "expressed as nitrogen"
	attribute actris_constraints_uri = "https://vocabulary.actris.nilu.no/actris_vocab/expressedasnitrogen"
	attribute actris_framework_preferred_term = "ACTRIS, EMEP, GAW-WDCRG"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/EMEP, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCRG"
	attribute actris_instrument_type_preferred_term = "chemiluminescence detector, photolytical converter"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter"
	attribute actris_matrix_preferred_term = "gas phase"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/gasphase"
	attribute actris_temporal_resolution = "PT1H"
	attribute actris_timeliness_preferred_term = "scheduled"
	attribute actris_timeliness_uri = "https://vocabulary.actris.nilu.no/actris_vocab/scheduled"
	attribute actris_variable_preferred_term = "nitric oxide mass concentration"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/nitricoxidemassconcentration"
	attribute ancillary_variables = "qc_nitrogen_monoxide_ug_N_per_m3_stddev meta_nitrogen_monoxide_ug_N_per_m3_stddev"
	attribute cell_methods = "time: standard_deviation"
	attribute ebas_acknowledgement = "Data used in this <study/report/figure/etc.> were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the frameworks: ACTRIS, EMEP, GAW-WDCRG."
	attribute ebas_component = "nitrogen_monoxide"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit_expl = "Determined by taking 2 times precision (standard deviation) of instrument signal for zero air during calibration and divided by the square root of the number (10) of observations in 1 hour. No detection limit flag used"
	attribute ebas_framework_acronym = "ACTRIS, EMEP, GAW-WDCRG"
	attribute ebas_framework_contact_email = "clm@nilu.no, kt@nilu.no, kt@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Kjetil Tørseth, Kjetil Tørseth"
	attribute ebas_framework_description = "\"ACTRIS is the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases. ACTRIS is composed of observing stations, exploratory platforms, instruments calibration centres, and a data centre.\", The European Monitoring and Evaluation Programme (EMEP) is a scientifically based and policy driven programme under the Convention on Long-range Transboundary Air Pollution (CLRTAP) for int'l co-operation to solve transboundary air pollution problems., The World Data Centre for Reactive Gases is the data repository and archive for reactive gases of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme."
	attribute ebas_framework_name = "\"European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases\", European Monitoring and Evaluation Programme, World Data Centre for Reactive Gases"
	attribute ebas_humidity_temperaure_control = "None"
	attribute ebas_humidity_temperaure_control_description = "indoors passive sample heating from atmospheric to lab temperature; analyser has inlet heating to 60 C"
	attribute ebas_inlet_description = "Rain protected; common main sample line with NOx and VOC instrument outdoors from which a separate line via a calibrator for NO, NO2 and O3 instruments."
	attribute ebas_inlet_tube_material = "PFA"
	attribute ebas_inlet_type = "Downward-facing tube"
	attribute ebas_instrument_manufacturer = "Ecophysics"
	attribute ebas_instrument_model = "CLD780TR"
	attribute ebas_instrument_name = "Ecophysics_CLD780TR_hyytiala"
	attribute ebas_instrument_type = "chemiluminescence_photolytic"
	attribute ebas_laboratory_code = "FI03L"
	attribute ebas_matrix = "air"
	attribute ebas_measurement_height = "35.0 m"
	attribute ebas_method_ref = "FI03L_Towergas_DE20L_NOx_corr_offset"
	attribute ebas_organization = "FI03L, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), PO BOX 64, , FI-00014, University of Helsinki, Finland"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Petäjä, Tuukka, tuukka.petaja@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\", \"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\""
	attribute ebas_ozone_correction = "Not corrected for reaction with O3 in the inlet"
	attribute ebas_platform_code = "FI0050S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-08-24T12:12:26.411034Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_station_altitude = "181.0 m"
	attribute ebas_station_code = "FI0050R"
	attribute ebas_station_gaw_id = "SMR"
	attribute ebas_station_gaw_type = "R"
	attribute ebas_station_land_use = "Forest"
	attribute ebas_station_latitude = 61.85
	attribute ebas_station_longitude = 24.283333
	attribute ebas_station_name = "Hyytiälä"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_state_province = "Pirka"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "stddev"
	attribute ebas_submitter = "\"Petri, Keronen, petri.keronen@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research (INAR), Gustaf Hällströmin katu 2a, , FI-00560, Helsinki, Finland, ORCID=0000-0001-5019-0904\", \"Hageman, Derek, derek.hageman@helsinki.fi, University of Helsinki, UHEL, Institute for Atmospheric and Earth System Research, Gustaf Hällströmin katu 2, , FI-00560, Helsinki, Finland\""
	attribute ebas_unit = "ug N/m3"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, manually inspected"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_water_vapor_correction = "Not corrected for water vapor quenching in CLD"
	attribute missing_value = nan
	attribute standard_name = "mass_concentration_of_nitrogen_monoxide_expressed_as_nitrogen_in_air"
	attribute units = "ug/m3"