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Obspack CH4 time-series result from Birkenes (75.0 m)

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2020-09-14–2026-08-05
11676/Bg4Q9d4z8sx1fIobn6sMjj92 (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 Birkenes (75.0 m). The measurements were calibrated using the WMO GAW calibration scale WMO X2004A. Included are (all whenever available) historical PI QCed data, ICOS Level 2 data, ICOS FastTrack data and ICOS NRT data. It is part of the CH4 European Obspack data product (version 12.0) 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/10.18160/7H4K-DBRP. 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 methane data from ICOS and non-ICOS European stations for the period 1984-2026; obspack_ch4_466_GVeu_v12.0_20260806
ICOS ObsPack compilation of atmospheric greenhouse gas data from Birkenes (BIR) for the period 2020-2026
Carbon Portal, Lund Myhre, C., Platt, S., Lunder, C., Hermansen, O. (2026). Obspack CH4 time-series result from Birkenes (75.0 m), 2020-09-14–2026-08-05, European ObsPack, https://hdl.handle.net/11676/Bg4Q9d4z8sx1fIobn6sMjj92
BibTex 
@misc{https://hdl.handle.net/11676/Bg4Q9d4z8sx1fIobn6sMjj92,
  author={Carbon Portal and Lund Myhre, Cathrine and Platt, Stephen Matthew and Lunder, Chris and Hermansen, Ove},
  title={Obspack CH4 time-series result from Birkenes (75.0 m), 2020-09-14–2026-08-05},
  year={2026},
  keywords={WMO X2004A, atmospheric dry air ch4 mole fraction},
  url={https://hdl.handle.net/11676/Bg4Q9d4z8sx1fIobn6sMjj92},
  publisher={Carbon Portal},
  copyright={http://meta.icos-cp.eu/ontologies/cpmeta/icosLicence},
  pid={11676/Bg4Q9d4z8sx1fIobn6sMjj92}
}
RIS 
TY - DATA
T1 - Obspack CH4 time-series result from Birkenes (75.0 m), 2020-09-14–2026-08-05
ID - 11676/Bg4Q9d4z8sx1fIobn6sMjj92
PY - 2026
UR - https://hdl.handle.net/11676/Bg4Q9d4z8sx1fIobn6sMjj92
PB - Carbon Portal
AU - Carbon Portal
AU - Lund Myhre, Cathrine
AU - Platt, Stephen Matthew
AU - Lunder, Chris
AU - Hermansen, Ove
KW - WMO X2004A
KW - atmospheric dry air ch4 mole fraction
ER -
View previous version
ch4_bir_tower-insitu_56_75magl.nc
995 KB (1019233 bytes)
51648
Obspack CH4 time-series result
2
ICOS CCBY4 Data Licence

Acquisition

Birkenes
2020-09-14 00:30:00
2026-08-05 23:30:00
75.0

Production

Carbon Portal
Carbon Portal
2026-08-06 21:02:46
Cathrine Lund Myhre, Stephen Matthew Platt, Chris Lunder, Ove Hermansen
ICOS_ATC_L2_L2-2026.1_BIR_75.0_CTS_CH4.zip
ICOS_ATC_NRT_BIR_2026-04-01_2026-08-05_75.0_547_CH4.zip
ICOS_ATC_OBSPACK-Europe-L2-2026_BIR_75.0_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
nvalue number of points cardinal number Preview

Statistics

3
0

Submission

Carbon Portal
2026-08-06 22:31:56
2026-08-06 22:31:55

Technical information

NetCDF (time series)
R, U, O
plain file
060e10f5de33f2cc757c8a1b9fab0c8e3f76d204f8cac7ba1617b920521fba67
Bg4Q9d4z8sx1fIobn6sMjj920gT4yse6Fhe5IFIfumc
Lat: 58.3886, Lon: 8.2519, Alt: 219.0 m
Birkenes
JSON • RDF/XML • RDF/Turtle • XML (ISO 19115-3:2016)
CH4 ICOS Obspack WMO X2004A atmospheric dry air ch4 mole fraction time series