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, GAW-WDCA. For using this data for any kind of publications, you must contact the data originator(s), in terms of acknowledgment"
	attribute citation = "Villani, P., Conil, S., ACTRIS, GAW-WDCA, 2026, Aerosol_absorption_coefficient at Observatoire Perenne de l'Environnement, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/9AUJ-EU7C"
	attribute contributor_name = "Nicolas Pascal"
	attribute contributor_role = "data submitter"
	attribute creator_email = "P.Villani@opgc.univ-bpclermont.fr, Sebastien.Conil@andra.fr"
	attribute creator_institution = "\"Observatoire de Physique du Globe de Clermont-Ferrand, CNRS/OPGC/LaMP, OPGC\", \"Observatoire Perenne de l'Environnement, Centre de Meuse/Haute-Marne, ANDRA/OPE\""
	attribute creator_name = "Paolo Villani, Sebastien Conil"
	attribute creator_type = "person"
	attribute date_created = "2026-07-13T07:54:31.544969Z"
	attribute date_metadata_modified = "2026-07-13T07:54:31Z"
	attribute doi = "https://doi.org/10.48597/9AUJ-EU7C"
	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, GAW-WDCA. For using this data for any kind of publications, you must contact the data originator(s), in terms of acknowledgment"
	attribute ebas_citation = "Villani, P., Conil, S., ACTRIS, GAW-WDCA, 2026, Aerosol_absorption_coefficient at Observatoire Perenne de l'Environnement, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/9AUJ-EU7C"
	attribute ebas_comment = "calibration factor / mean ratio=7.77; sample_spot_area=7.85e-5 m2"
	attribute ebas_component = "aerosol_absorption_coefficient"
	attribute ebas_contains_doi = "https://doi.org/10.48597/9AUJ-EU7C"
	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 = "0.1 1/Mm"
	attribute ebas_detection_limit_expl = "instrument characteristics, information from Magee"
	attribute ebas_export_filter = "exclude-900,exclude-invalid"
	attribute ebas_export_state = "2026-07-13T07:54:31.544969Z"
	attribute ebas_file_creation = "2026-07-13T08:11:30.882653Z"
	attribute ebas_file_name = "9AUJ-EU7C.nc"
	attribute ebas_flow_rate = "5.0 l/min"
	attribute ebas_framework_acronym = "ACTRIS, GAW-WDCA"
	attribute ebas_framework_contact_email = "clm@nilu.no, Markus.Fiebig@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Markus Fiebig"
	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 World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol 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\", World Data Centre for Aerosols"
	attribute ebas_humidity_temperaure_control = "Nafion dryer"
	attribute ebas_inlet_description = "Vertical inlet stainless steel tubing and black conductive tubing from the manufacturer"
	attribute ebas_inlet_type = "Cyclone"
	attribute ebas_instrument_manufacturer = "Magee"
	attribute ebas_instrument_model = "AE33"
	attribute ebas_instrument_name = "Magee_AE33_S05-00510_OPE_pm25"
	attribute ebas_instrument_serial_number = "AE33-S05-00510"
	attribute ebas_instrument_type = "filter_absorption_photometer"
	attribute ebas_laboratory_code = "FR11L"
	attribute ebas_matrix = "pm25"
	attribute ebas_measurement_altitude = "392.0 m"
	attribute ebas_measurement_height = "4.0 m"
	attribute ebas_measurement_latitude = 48.562
	attribute ebas_measurement_longitude = 5.505
	attribute ebas_measurement_uncertainty_expl = "typical value of unit-to-unit variability"
	attribute ebas_method_ref = "FR07L_AE33manual"
	attribute ebas_organization = "FR11L, Agence nationale pour la gestion des déchets radioactifs, Andra, , 1/7 rue Jean Monnet, , 92298, CHATENAY-MALABRY Cedex, France"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Villani, Paolo, P.Villani@opgc.univ-bpclermont.fr, Observatoire de Physique du Globe de Clermont-Ferrand, OPGC, CNRS/OPGC/LaMP, 4 avenue Blaise Pascal - TSA60026 CS60026, Campus des Cezeaux, 63178, Aubiere, France\", \"Conil, Sebastien, Sebastien.Conil@andra.fr, Observatoire Perenne de l'Environnement, ANDRA/OPE, Centre de Meuse/Haute-Marne, RD960, CP9, 55290, Bure, France\""
	attribute ebas_period_code = "2y"
	attribute ebas_platform_code = "FR0022S"
	attribute ebas_regime = "IMG"
	attribute ebas_represents_doi = "https://doi.org/10.48597/9AUJ-EU7C"
	attribute ebas_resolution_code = "1h"
	attribute ebas_revision_date = "2026-07-13T07:54:31.544969Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_set_type_code = "TU"
	attribute ebas_standard_method = "Single-angle_Correction=Drinovec2015"
	attribute ebas_startdate = "2023-01-01T00:00:00.000000Z"
	attribute ebas_station_altitude = "392.0 m"
	attribute ebas_station_code = "FR0022R"
	attribute ebas_station_gaw_id = "OPE"
	attribute ebas_station_land_use = "Agricultural"
	attribute ebas_station_latitude = 48.562222222222225
	attribute ebas_station_longitude = 5.5055555555555555
	attribute ebas_station_name = "Observatoire Perenne de l'Environnement"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_wmo_region = 6
	attribute ebas_submitter = "\"Pascal, Nicolas, , , , , , , , , \""
	attribute ebas_timezone = "UTC"
	attribute ebas_unit = "1/Mm"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, raw data"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_zero_negative_values = "zero and neg. values may appear due to statistical variations at very low concentrations; no zero values for channels 2, 6 and 7 (470, 880 and 950 nm)"
	attribute ebas_zero_negative_values_code = "Zero/negative possible"
	attribute featureType = "timeSeries"
	attribute geospatial_bounds = "MULTIPOINT Z ((5.505 48.562 392), (5.5055555555555555 48.562222222222225 392))"
	attribute geospatial_bounds_crs = "EPSG:4979"
	attribute geospatial_lat_max = 48.562222222222225
	attribute geospatial_lat_min = 48.562
	attribute geospatial_lon_max = 5.5055555555555555
	attribute geospatial_lon_min = 5.505
	attribute geospatial_vertical_max = 392.0
	attribute geospatial_vertical_min = 392.0
	attribute geospatial_vertical_positive = "up"
	attribute id = "9AUJ-EU7C.nc"
	attribute institution = "FR11L \"Agence nationale pour la gestion des déchets radioactifs\" Andra \"1/7 rue Jean Monnet\" 92298 \"CHATENAY-MALABRY Cedex\" France"
	attribute keywords = "\"Observatoire Perenne de l'Environnement\" FR0022R aerosol_absorption_coefficient pm25 ACTRIS GAW-WDCA"
	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, GAW-WDCA"
	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 = "Aerosol_absorption_coefficient at Observatoire Perenne de l'Environnement. These measurements are gathered as a part of the following projects ACTRIS, GAW-WDCA and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['aerosol_absorption_coefficient in pm25']"
	attribute time_coverage_duration = "P0002-00-00T00:00:00"
	attribute time_coverage_end = "2025-01-01T00:00:00Z"
	attribute time_coverage_resolution = "P0000-00-00T01:00:00"
	attribute time_coverage_start = "2023-01-01T00:00:00Z"
	attribute timezone = "UTC"
	attribute title = "Aerosol_absorption_coefficient at Observatoire Perenne de l'Environnement"
dataset /d_Wavelength: float64, shape (7)
// d_Wavelength: first 370.0, last 950.0, count 7
dataset /meta_aerosol_absorption_coefficient_amean: string, shape (7, 2)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_aerosol_absorption_coefficient_perc8413: string, shape (7, 2)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /meta_aerosol_absorption_coefficient_prec1587: string, shape (7, 2)
	attribute long_name = "ebas metadata for different time intervals; json encoded"
dataset /metadata_time: float64, shape (2)
	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 45107.5, last 45473.0, count 2
dataset /metadata_time_bnds: float64, shape (2, 2)
	attribute long_name = "time bounds for ebas metadata intervals"
dataset /qc_aerosol_absorption_coefficient_amean: int32, shape (7, 1, 17544)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_aerosol_absorption_coefficient_amean_flags: float32, shape (1)
dataset /qc_aerosol_absorption_coefficient_perc8413: int32, shape (7, 1, 17544)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_aerosol_absorption_coefficient_perc8413_flags: float32, shape (1)
dataset /qc_aerosol_absorption_coefficient_prec1587: int32, shape (7, 1, 17544)
	attribute _FillValue = 0
	attribute missing_value = 0
	attribute standard_name = "status_flag"
	attribute units = "1"
dataset /qc_aerosol_absorption_coefficient_prec1587_flags: float32, shape (1)
dataset /tbnds: float32, shape (2)
dataset /time: float64, shape (17544)
	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 45655.979166666664, count 17544
dataset /time_bnds: float64, shape (17544, 2)
	attribute long_name = "time bounds for measurement"
dataset /v_aerosol_absorption_coefficient_amean: float64, shape (7, 17544)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_framework_preferred_term = "ACTRIS, GAW-WDCA"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA"
	attribute actris_instrument_type_preferred_term = "filter absorption photometer"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/filterabsorptionphotometer"
	attribute actris_matrix_preferred_term = "PM2.5"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/PM2.5"
	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 = "aerosol particle light absorption coefficient"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticlelightabsorptioncoefficient"
	attribute ancillary_variables = "qc_aerosol_absorption_coefficient_amean meta_aerosol_absorption_coefficient_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, GAW-WDCA. For using this data for any kind of publications, you must contact the data originator(s), in terms of acknowledgment"
	attribute ebas_comment = "calibration factor / mean ratio=7.77; sample_spot_area=7.85e-5 m2"
	attribute ebas_component = "aerosol_absorption_coefficient"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit = "0.1 1/Mm"
	attribute ebas_detection_limit_expl = "instrument characteristics, information from Magee"
	attribute ebas_flow_rate = "5.0 l/min"
	attribute ebas_framework_acronym = "ACTRIS, GAW-WDCA"
	attribute ebas_framework_contact_email = "clm@nilu.no, Markus.Fiebig@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Markus Fiebig"
	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 World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol 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\", World Data Centre for Aerosols"
	attribute ebas_humidity_temperaure_control = "Nafion dryer"
	attribute ebas_inlet_description = "Vertical inlet stainless steel tubing and black conductive tubing from the manufacturer"
	attribute ebas_inlet_type = "Cyclone"
	attribute ebas_instrument_manufacturer = "Magee"
	attribute ebas_instrument_model = "AE33"
	attribute ebas_instrument_name = "Magee_AE33_S05-00510_OPE_pm25"
	attribute ebas_instrument_serial_number = "AE33-S05-00510"
	attribute ebas_instrument_type = "filter_absorption_photometer"
	attribute ebas_laboratory_code = "FR11L"
	attribute ebas_matrix = "pm25"
	attribute ebas_measurement_altitude = "392.0 m"
	attribute ebas_measurement_height = "4.0 m"
	attribute ebas_measurement_latitude = 48.562
	attribute ebas_measurement_longitude = 5.505
	attribute ebas_measurement_uncertainty_expl = "typical value of unit-to-unit variability"
	attribute ebas_method_ref = "FR07L_AE33manual"
	attribute ebas_organization = "FR11L, Agence nationale pour la gestion des déchets radioactifs, Andra, , 1/7 rue Jean Monnet, , 92298, CHATENAY-MALABRY Cedex, France"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Villani, Paolo, P.Villani@opgc.univ-bpclermont.fr, Observatoire de Physique du Globe de Clermont-Ferrand, OPGC, CNRS/OPGC/LaMP, 4 avenue Blaise Pascal - TSA60026 CS60026, Campus des Cezeaux, 63178, Aubiere, France\", \"Conil, Sebastien, Sebastien.Conil@andra.fr, Observatoire Perenne de l'Environnement, ANDRA/OPE, Centre de Meuse/Haute-Marne, RD960, CP9, 55290, Bure, France\""
	attribute ebas_platform_code = "FR0022S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-07-13T07:54:31.544969Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_standard_method = "Single-angle_Correction=Drinovec2015"
	attribute ebas_station_altitude = "392.0 m"
	attribute ebas_station_code = "FR0022R"
	attribute ebas_station_gaw_id = "OPE"
	attribute ebas_station_land_use = "Agricultural"
	attribute ebas_station_latitude = 48.562222222222225
	attribute ebas_station_longitude = 5.5055555555555555
	attribute ebas_station_name = "Observatoire Perenne de l'Environnement"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "arithmetic mean"
	attribute ebas_submitter = "\"Pascal, Nicolas, , , , , , , , , \""
	attribute ebas_unit = "1/Mm"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, raw data"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_zero_negative_values = "zero and neg. values may appear due to statistical variations at very low concentrations; no zero values for channels 2, 6 and 7 (470, 880 and 950 nm)"
	attribute ebas_zero_negative_values_code = "Zero/negative possible"
	attribute missing_value = nan
	attribute units = "1/Mm"
dataset /v_aerosol_absorption_coefficient_perc8413: float64, shape (7, 17544)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_framework_preferred_term = "ACTRIS, GAW-WDCA"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA"
	attribute actris_instrument_type_preferred_term = "filter absorption photometer"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/filterabsorptionphotometer"
	attribute actris_matrix_preferred_term = "PM2.5"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/PM2.5"
	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 = "aerosol particle light absorption coefficient"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticlelightabsorptioncoefficient"
	attribute ancillary_variables = "qc_aerosol_absorption_coefficient_perc8413 meta_aerosol_absorption_coefficient_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, GAW-WDCA. For using this data for any kind of publications, you must contact the data originator(s), in terms of acknowledgment"
	attribute ebas_comment = "calibration factor / mean ratio=7.77; sample_spot_area=7.85e-5 m2"
	attribute ebas_component = "aerosol_absorption_coefficient"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit = "0.1 1/Mm"
	attribute ebas_detection_limit_expl = "instrument characteristics, information from Magee"
	attribute ebas_flow_rate = "5.0 l/min"
	attribute ebas_framework_acronym = "ACTRIS, GAW-WDCA"
	attribute ebas_framework_contact_email = "clm@nilu.no, Markus.Fiebig@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Markus Fiebig"
	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 World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol 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\", World Data Centre for Aerosols"
	attribute ebas_humidity_temperaure_control = "Nafion dryer"
	attribute ebas_inlet_description = "Vertical inlet stainless steel tubing and black conductive tubing from the manufacturer"
	attribute ebas_inlet_type = "Cyclone"
	attribute ebas_instrument_manufacturer = "Magee"
	attribute ebas_instrument_model = "AE33"
	attribute ebas_instrument_name = "Magee_AE33_S05-00510_OPE_pm25"
	attribute ebas_instrument_serial_number = "AE33-S05-00510"
	attribute ebas_instrument_type = "filter_absorption_photometer"
	attribute ebas_laboratory_code = "FR11L"
	attribute ebas_matrix = "pm25"
	attribute ebas_measurement_altitude = "392.0 m"
	attribute ebas_measurement_height = "4.0 m"
	attribute ebas_measurement_latitude = 48.562
	attribute ebas_measurement_longitude = 5.505
	attribute ebas_measurement_uncertainty_expl = "typical value of unit-to-unit variability"
	attribute ebas_method_ref = "FR07L_AE33manual"
	attribute ebas_organization = "FR11L, Agence nationale pour la gestion des déchets radioactifs, Andra, , 1/7 rue Jean Monnet, , 92298, CHATENAY-MALABRY Cedex, France"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Villani, Paolo, P.Villani@opgc.univ-bpclermont.fr, Observatoire de Physique du Globe de Clermont-Ferrand, OPGC, CNRS/OPGC/LaMP, 4 avenue Blaise Pascal - TSA60026 CS60026, Campus des Cezeaux, 63178, Aubiere, France\", \"Conil, Sebastien, Sebastien.Conil@andra.fr, Observatoire Perenne de l'Environnement, ANDRA/OPE, Centre de Meuse/Haute-Marne, RD960, CP9, 55290, Bure, France\""
	attribute ebas_platform_code = "FR0022S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-07-13T07:54:31.544969Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_standard_method = "Single-angle_Correction=Drinovec2015"
	attribute ebas_station_altitude = "392.0 m"
	attribute ebas_station_code = "FR0022R"
	attribute ebas_station_gaw_id = "OPE"
	attribute ebas_station_land_use = "Agricultural"
	attribute ebas_station_latitude = 48.562222222222225
	attribute ebas_station_longitude = 5.5055555555555555
	attribute ebas_station_name = "Observatoire Perenne de l'Environnement"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "percentile:84.13"
	attribute ebas_submitter = "\"Pascal, Nicolas, , , , , , , , , \""
	attribute ebas_unit = "1/Mm"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, raw data"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_zero_negative_values = "zero and neg. values may appear due to statistical variations at very low concentrations; no zero values for channels 2, 6 and 7 (470, 880 and 950 nm)"
	attribute ebas_zero_negative_values_code = "Zero/negative possible"
	attribute missing_value = nan
	attribute units = "1/Mm"
dataset /v_aerosol_absorption_coefficient_prec1587: float64, shape (7, 17544)
	attribute _FillValue = nan
	attribute actris_access_restriction = 0
	attribute actris_framework_preferred_term = "ACTRIS, GAW-WDCA"
	attribute actris_framework_uri = "https://vocabulary.actris.nilu.no/actris_controlled_lists/ACTRIS, https://vocabulary.actris.nilu.no/actris_controlled_lists/GAW-WDCA"
	attribute actris_instrument_type_preferred_term = "filter absorption photometer"
	attribute actris_instrument_type_uri = "https://vocabulary.actris.nilu.no/actris_vocab/filterabsorptionphotometer"
	attribute actris_matrix_preferred_term = "PM2.5"
	attribute actris_matrix_uri = "https://vocabulary.actris.nilu.no/actris_vocab/PM2.5"
	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 = "aerosol particle light absorption coefficient"
	attribute actris_variable_uri = "https://vocabulary.actris.nilu.no/actris_vocab/aerosolparticlelightabsorptioncoefficient"
	attribute ancillary_variables = "qc_aerosol_absorption_coefficient_prec1587 meta_aerosol_absorption_coefficient_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, GAW-WDCA. For using this data for any kind of publications, you must contact the data originator(s), in terms of acknowledgment"
	attribute ebas_comment = "calibration factor / mean ratio=7.77; sample_spot_area=7.85e-5 m2"
	attribute ebas_component = "aerosol_absorption_coefficient"
	attribute ebas_data_level = "2"
	attribute ebas_data_license = "https://creativecommons.org/licenses/by/4.0/"
	attribute ebas_detection_limit = "0.1 1/Mm"
	attribute ebas_detection_limit_expl = "instrument characteristics, information from Magee"
	attribute ebas_flow_rate = "5.0 l/min"
	attribute ebas_framework_acronym = "ACTRIS, GAW-WDCA"
	attribute ebas_framework_contact_email = "clm@nilu.no, Markus.Fiebig@nilu.no"
	attribute ebas_framework_contact_name = "Cathrine Lund Myhre, Markus Fiebig"
	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 World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol 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\", World Data Centre for Aerosols"
	attribute ebas_humidity_temperaure_control = "Nafion dryer"
	attribute ebas_inlet_description = "Vertical inlet stainless steel tubing and black conductive tubing from the manufacturer"
	attribute ebas_inlet_type = "Cyclone"
	attribute ebas_instrument_manufacturer = "Magee"
	attribute ebas_instrument_model = "AE33"
	attribute ebas_instrument_name = "Magee_AE33_S05-00510_OPE_pm25"
	attribute ebas_instrument_serial_number = "AE33-S05-00510"
	attribute ebas_instrument_type = "filter_absorption_photometer"
	attribute ebas_laboratory_code = "FR11L"
	attribute ebas_matrix = "pm25"
	attribute ebas_measurement_altitude = "392.0 m"
	attribute ebas_measurement_height = "4.0 m"
	attribute ebas_measurement_latitude = 48.562
	attribute ebas_measurement_longitude = 5.505
	attribute ebas_measurement_uncertainty_expl = "typical value of unit-to-unit variability"
	attribute ebas_method_ref = "FR07L_AE33manual"
	attribute ebas_organization = "FR11L, Agence nationale pour la gestion des déchets radioactifs, Andra, , 1/7 rue Jean Monnet, , 92298, CHATENAY-MALABRY Cedex, France"
	attribute ebas_orig_time_res = "1mn"
	attribute ebas_originator = "\"Villani, Paolo, P.Villani@opgc.univ-bpclermont.fr, Observatoire de Physique du Globe de Clermont-Ferrand, OPGC, CNRS/OPGC/LaMP, 4 avenue Blaise Pascal - TSA60026 CS60026, Campus des Cezeaux, 63178, Aubiere, France\", \"Conil, Sebastien, Sebastien.Conil@andra.fr, Observatoire Perenne de l'Environnement, ANDRA/OPE, Centre de Meuse/Haute-Marne, RD960, CP9, 55290, Bure, France\""
	attribute ebas_platform_code = "FR0022S"
	attribute ebas_regime = "IMG"
	attribute ebas_revision_date = "2026-07-13T07:54:31.544969Z"
	attribute ebas_sample_duration = "1h"
	attribute ebas_standard_method = "Single-angle_Correction=Drinovec2015"
	attribute ebas_station_altitude = "392.0 m"
	attribute ebas_station_code = "FR0022R"
	attribute ebas_station_gaw_id = "OPE"
	attribute ebas_station_land_use = "Agricultural"
	attribute ebas_station_latitude = 48.562222222222225
	attribute ebas_station_longitude = 5.5055555555555555
	attribute ebas_station_name = "Observatoire Perenne de l'Environnement"
	attribute ebas_station_setting = "Rural"
	attribute ebas_station_wmo_region = 6
	attribute ebas_statistics = "percentile:15.87"
	attribute ebas_submitter = "\"Pascal, Nicolas, , , , , , , , , \""
	attribute ebas_unit = "1/Mm"
	attribute ebas_version = "1"
	attribute ebas_version_description = "initial revision, raw data"
	attribute ebas_volume_std_pressure = "1013.25 hPa"
	attribute ebas_volume_std_temperature = "273.15 K"
	attribute ebas_zero_negative_values = "zero and neg. values may appear due to statistical variations at very low concentrations; no zero values for channels 2, 6 and 7 (470, 880 and 950 nm)"
	attribute ebas_zero_negative_values_code = "Zero/negative possible"
	attribute missing_value = nan
	attribute units = "1/Mm"