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Obspack CH4 time-series result from Centre de Recherches Atmosphériques (5.0 m)

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2019-04-12–2021-07-19
11676/TpLhLZI3ZV5Be9EpLdH5W8zF (link)
This data file contains high accuracy European ObsPack observational timeseries in netCDF format of ambient mole fraction of CH4 in dry air collected at Centre de Recherches Atmosphériques (5.0 m). The measurements were calibrated using the WMO GAW calibration scale WMO CH4 X2004A. Included are (all whenever available) historical PI QCed data, ICOS Level 2 data and ICOS NRT data. It is part of the CH4 European Obspack data product (version 11.0) and is intended for use in carbon cycle inverse modeling, model evaluation, and satellite validation studies. Metadata for the full CH4 product release are available at https://commons.datacite.org/doi.org/10.18160/X5ZG-C3WE. Please also visit http://www.gml.noaa.gov/ccgg/obspack/ for more information. If you use these data in your research, please consider citing the full ObsPack release that this file is part of (https://commons.datacite.org/doi.org/10.18160/ERAF-JSPW).
European ObsPack
European Obspack compilation of atmospheric carbon dioxide, methane, nitrous oxide and carbon monoxide data from ICOS and non-ICOS European stations for the period 1972-2025; obspack_466_GVeu_v11.0_20250821
ICOS RI, Delmotte, M., Gheusi, F., Lopez, M., Ramonet, M. (2025). Obspack CH4 time-series result from Centre de Recherches Atmosphériques (5.0 m), 2019-04-12–2021-07-19, European ObsPack, https://hdl.handle.net/11676/TpLhLZI3ZV5Be9EpLdH5W8zF
BibTex 
@misc{https://hdl.handle.net/11676/TpLhLZI3ZV5Be9EpLdH5W8zF,
  author={ICOS RI and Delmotte, Marc and Gheusi, François and Lopez, Morgan and Ramonet, Michel},
  title={Obspack CH4 time-series result from Centre de Recherches Atmosphériques (5.0 m), 2019-04-12–2021-07-19},
  year={2025},
  keywords={WMO X2004A, atmospheric dry air ch4 mole fraction},
  url={https://hdl.handle.net/11676/TpLhLZI3ZV5Be9EpLdH5W8zF},
  publisher={Carbon Portal},
  copyright={http://meta.icos-cp.eu/ontologies/cpmeta/icosLicence},
  pid={11676/TpLhLZI3ZV5Be9EpLdH5W8zF}
}
RIS 
TY - DATA
T1 - Obspack CH4 time-series result from Centre de Recherches Atmosphériques (5.0 m), 2019-04-12–2021-07-19
ID - 11676/TpLhLZI3ZV5Be9EpLdH5W8zF
PY - 2025
UR - https://hdl.handle.net/11676/TpLhLZI3ZV5Be9EpLdH5W8zF
PB - Carbon Portal
AU - ICOS RI
AU - Delmotte, Marc
AU - Gheusi, François
AU - Lopez, Morgan
AU - Ramonet, Michel
KW - WMO X2004A
KW - atmospheric dry air ch4 mole fraction
ER -
View previous version
ch4_cra_tower-insitu_473_allvalid-5magl.nc
465 KB (476420 bytes)
18023
Obspack CH4 time-series result
2
ICOS CCBY4 Data Licence

Acquisition

Centre de Recherches Atmosphériques
2019-04-12 14:30:00
2021-07-19 11:30:00
5.0

Production

ICOS RI
Carbon Portal
2025-08-18 12:04:57
Marc Delmotte, François Gheusi, Morgan Lopez, Michel Ramonet
ICOS_ATC_OBSPACK-Europe-L2-2022_CRA_5.0_CTS_CH4.zip

Previewable variables

Name Value type Unit Quantity kind Preview
time time instant, UTC
qc_flag quality flag
icos_datalevel data level (Obspack) natural number Preview
value_std_dev standard deviation of gas mole fraction a.u. portion Preview
icos_LTR ICOS mole fraction uncertainty metrics mol mol-1 portion Preview
icos_STTB ICOS mole fraction uncertainty metrics mol mol-1 portion Preview
icos_SMR ICOS mole fraction uncertainty metrics mol mol-1 portion Preview
value CH4 (dry air mole fraction) mol mol-1 portion Preview

Statistics

19
0

Submission

Carbon Portal
2025-08-21 13:35:02
2025-08-21 13:35:01

Technical information

NetCDF (time series)
R, U, O
plain file
4e92e12d9237655e417bd1292dd1f95bccc5482e0cda9566b4cff26717e96716
TpLhLZI3ZV5Be9EpLdH5W8zFSC4M2pVmtM/yZxfpZxY
Lat: 43.1298, Lon: 0.3692, Alt: 600.0 m
Centre de Recherches Atmosphériques
JSON • RDF/XML • RDF/Turtle • XML (ISO 19115-3:2016)
CH4 ICOS Obspack WMO X2004A atmospheric dry air ch4 mole fraction time series