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Obspack CH4 time-series result from Roc'h Trédudon (25.0 m)

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2021-10-28–2026-03-31
11676/egkM0tCBYVp9B2krBs5O2hfL (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 Roc'h Trédudon (25.0 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).
Carbon Portal, Delmotte, M., Lopez, M., Ramonet, M. (2026). Obspack CH4 time-series result from Roc'h Trédudon (25.0 m), 2021-10-28–2026-03-31, European ObsPack, https://hdl.handle.net/11676/egkM0tCBYVp9B2krBs5O2hfL
BibTex
@misc{https://hdl.handle.net/11676/egkM0tCBYVp9B2krBs5O2hfL,
  author={Carbon Portal and Delmotte, Marc and Lopez, Morgan and Ramonet, Michel},
  title={Obspack CH4 time-series result from Roc'h Trédudon (25.0 m), 2021-10-28–2026-03-31},
  year={2026},
  keywords={WMO X2004A, atmospheric dry air ch4 mole fraction},
  url={https://hdl.handle.net/11676/egkM0tCBYVp9B2krBs5O2hfL},
  publisher={Carbon Portal},
  copyright={http://meta.icos-cp.eu/ontologies/cpmeta/icosLicence},
  pid={11676/egkM0tCBYVp9B2krBs5O2hfL}
}
RIS
TY - DATA
T1 - Obspack CH4 time-series result from Roc'h Trédudon (25.0 m), 2021-10-28–2026-03-31
ID - 11676/egkM0tCBYVp9B2krBs5O2hfL
PY - 2026
UR - https://hdl.handle.net/11676/egkM0tCBYVp9B2krBs5O2hfL
PB - Carbon Portal
AU - Carbon Portal
AU - Delmotte, Marc
AU - Lopez, Morgan
AU - Ramonet, Michel
KW - WMO X2004A
KW - atmospheric dry air ch4 mole fraction
ER - 
ch4_roc_tower-insitu_11_25magl.nc
822 KB (841704 bytes)
38772
2

Acquisition

2021-10-28 00:30:00
2026-03-31 23:30:00
25.0

Production

2026-08-06 21:15:27

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

2
0

Submission

2026-08-06 22:34:31
2026-08-06 22:34:30

Technical information

R, U, O
7a090cd2d081615a7d07692b06ce4eda17cbbe54943477658a43e9984e286405
egkM0tCBYVp9B2krBs5O2hfLvlSUNHdlikPpmE4oZAU
Lat: 48.4133, Lon: -3.8895, Alt: 362.0 m
CH4 ICOS Obspack WMO X2004A atmospheric dry air ch4 mole fraction time series