Data Policy
GAW Data Policy
"For Scientific purposes, access to these data is unlimited and provided without charge.
By their use you accept that an offer of co-authorship will be made through personal contact with the data providers
or owners whenever substantial use is made of their data.
In all cases, an acknowledgement must be made to the data providers or owners and to the data centre when these data are used within a publication."
Version
2025-09-10-0001 (Last updated: 2025-09-16)File
This data set is submitted by ICOS.
In line with the GAW Data Policy, users should contact the contributors of all data of interest and propose co-authorship or acknowledgement.
Organization
| NO | 162 |
|---|---|
| Acronym | ICOS |
| Name | Integrated Carbon Observation System Research Infrastructure |
| Address 1 | Erik Palménin aukio 1 |
| Address 2 | FI-00560 Helsinki |
| Address 3 | FINLAND |
| Country/Territory | Multinational |
| Website | https://www.icos-cp.eu |
Contact(s)
| Name | Arnoud Frumau |
|---|---|
| Prefix | |
| arnoud.frumau@tno.nl | |
| Organization No | 172 |
| Organization acronym | TNO |
| Organization name | Netherlands Organisation of Applied Scientific Research |
| Organization country/territory | Kingdom of the Netherlands |
| Address 1 | |
| Address 2 | |
| Address 3 | |
| Country/territory | Kingdom of the Netherlands |
| Tel | |
| Fax | |
| Last updated date | 2025-09-10 |
| Name | Arjan Hensen |
|---|---|
| Prefix | |
| arjan.hensen@tno.nl | |
| Organization No | 172 |
| Organization acronym | TNO |
| Organization name | Netherlands Organisation of Applied Scientific Research |
| Organization country/territory | Kingdom of the Netherlands |
| Address 1 | |
| Address 2 | |
| Address 3 | |
| Country/territory | Kingdom of the Netherlands |
| Tel | |
| Fax | |
| Last updated date | 2025-09-10 |
| Name | Alex Vermeulen |
|---|---|
| Prefix | |
| alex.vermeulen@nateko.lu.se | |
| Organization No | 172 |
| Organization acronym | TNO |
| Organization name | Netherlands Organisation of Applied Scientific Research |
| Organization country/territory | Kingdom of the Netherlands |
| Address 1 | |
| Address 2 | |
| Address 3 | |
| Country/territory | Kingdom of the Netherlands |
| Tel | |
| Fax | |
| Last updated date | 2025-09-10 |
| Name | Pim Van den Bulk |
|---|---|
| Prefix | |
| pim.vandenbulk@tno.nl | |
| Organization No | 172 |
| Organization acronym | TNO |
| Organization name | Netherlands Organisation of Applied Scientific Research |
| Organization country/territory | Kingdom of the Netherlands |
| Address 1 | |
| Address 2 | |
| Address 3 | |
| Country/territory | Kingdom of the Netherlands |
| Tel | |
| Fax | |
| Last updated date | 2025-09-10 |
| Background observation | |
| UTC | |
| ppb | |
|
9999-12-31 00:00:00 - 9999-12-31 23:59:59: WMO CH4 X2004A |
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9999-12-31 00:00:00 - 9999-12-31 23:59:59: 207.0 (m) |
|
| Unknown | |
| Measurement calibration at ICOS ATC is described in [Hazan et al., 2016], doi:10.5194/amt-9-4719-2016 | |
| Data processing at ICOS ATC is described in [Hazan et al., 2016], doi:10.5194/amt-9-4719-2016 | |
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[Hourly] Time-averaged values are reported at the start time of the averaging interval. The document 'ICOS Atmospheric Station specifications' (doi:10.18160/GK28-2188) provides more detailed explanations about the sampling frequency. [Daily] [Monthly] |
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- Flag 'U' = data correct before manual quality control - Flag 'N' = data incorrect before manual quality control - Flag 'O' = data correct after manual quality control - Flag 'K' = data incorrect after manual quality control - Flag 'R' = data correct after manual quality control and backward propagation of manual quality control from hourly data to minutely and raw data - Flag 'H' = data incorrect after manual quality control and backward propagation of manual quality control from hourly data to minutely and raw data |
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Valid (background): U Valid (background): O Valid (background): R Invalid: N Invalid: K Invalid: H |
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| Operational/Reporting | |
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ICOS atmospheric station Observational timeseries of ambient mole fraction of CH4 in dry air, composed of (all whenever available) historical PI quality-checked data, ICOS Level 2 data and ICOS NRT data. The following uncertainty estimates are used: a. Continuous Measurement Repeatability: monthly average of the standard deviations of short-term target raw data over 1-minute intervals b. Long Term Repeatability: standard deviation of the averaged short-term target measurement intervals (of 10 minutes every 5 hours approximately) over three days c. Short Term Target Bias: difference between the hourly average of the short-term target injections and the value assigned by the calibration lab The method used for "value_unc_1" is "Continuous Measurement Repeatability". The method used for "value_unc_2" is "Long Term Repeatability". The method used for "value_unc_3" is "Short Term Target Bias". More information about the uncertainty estimates can be found in Yver Kwok et al. (2015) (https://doi.org/10.5194/amt-8-3867-2015) and Yver-Kwok et al. (2021) (https://amt.copernicus.org/articles/14/89/2021/). PID: 11676/c6aJRjpBgfQE9sI923Qf6De7 Citation: ICOS RI, Bergamaschi, P., Colomb, A., De Mazière, M., Emmenegger, L., Harris, E., Kubistin, D., Lehner, I., Lehtinen, K., Leuenberger, M., Lund Myhre, C., Marek, M.V., O'Doherty, S., Platt, S.M., Plaß-Dülmer, C., Ramonet, M., Rennick, C., Schmidt, M., Stanley, K., di Sarra, A., Apadula, F., Arnold, S., Blanc, P.-E., Blessing, C., Brunner, D., Chen, H., Chmura, L., Conil, S., Couret, C., Cristofanelli, P., Delmotte, M., Di Iorio, T., Forster, G., Frumau, A., Gerbig, C., Gheusi, F., Hammer, S., Haszpra, L., Hatakka, J., Heliasz, M., Henne, S., Hensen, A., Hermansen, O., Hoheisel, A., Jagoda, P., Joly, L., Kneuer, T., Larmanou, E., Laurila, T., Leskinen, A., Levin, I., Levula, J., Lindauer, M., Lopez, D., Lopez, M., Lunder, C., Mammarella, I., Manca, G., Manning, A., Marklund, P., Martin, D., Meinhardt, F., Molder, M., Molnár, M., Müller-Williams, J., Noe, S.M., Nęcki, J., Ottosson-Löfvenius, M., Philippon, C., Piacentino, S., Pitt, J., Rivas-Soriano, P., Scheeren, B., Schumacher, M., Sha, M.K., Smith, P., Spain, G., Steinbacher, M., Sørensen, L.L., Vermeulen, A., Vítková, G., Xueref-Remy, I., Ylisirniö, A., Yver-Kwok, C., Zwerschke, E., Arriga, N., Conen, F., Kazan, V., Roulet, Y.-A., Biermann, T., Heltai, D., Komínková, K., Laurent, O., Miettinen, P., Montaguti, S., Morguí, J.-A., Pichon, J.-M., Sferlazzo, D., Trisolino, P., Zazzeri, G., Blandin, E., Bracci, A., Busetto, M., Bán, S., Bäni, L., Calzolari, F., Elsasser, M., Fratticioli, C., Friedli, J., Fuente-Lastra, M., Gest, L., Grossmann, J., Hanuš, V., Helle, J., Hermans, C., Keronen, P., Kolari, P., Kumps, N., Laitinen, A., Langrene, L., Lanza, A., Legendre, V., Mandrick, Z., Metzger, J.-M., Rigouleau, L.-J., Schreiber, M., Steger, D., Taipale, R., Weyrauch, D., van den Bulk, P., Álvarez Hernández, A., ICOS Carbon Portal, ICOS Atmosphere Thematic Centre, ICOS Flask And Calibration Laboratory, ICOS Central Radiocarbon Laboratory, 2025. European Obspack compilation of atmospheric methane data from ICOS and non-ICOS European stations for the period 1984-2025; obspack_ch4_466_GVeu_v11.0_20250818. https://doi.org/10.18160/X5ZG-C3WE DATA POLICY: ICOS data is licensed under a Creative Commons Attribution 4.0 international licence (https://creativecommons.org/licenses/by/4.0/). ICOS data licence is described at https://data.icos-cp.eu/licence. |
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Wind direction: Wind speed: Relative humidity: Precipitation amount: Air pressure: Air temperature: Dew point temperature: Sea water temperature: Sea surface water temperature: Sea water salinity: Sea surface water salinity: |
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Meteorological data may remain as first provided, even when greenhouse gas data are updated. |
DOI Metadata
| DOI |
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| For more information, please refer: doi.org/10.18160/X5ZG-C3WE | |||||||||||||
Related information
| Format | Text (WDCGG Data Format Table, WDCGG Meteorological Data Format Table), NetCDF | ||||
|---|---|---|---|---|---|
| Relation List (Is Part Of) | |||||
| Geolocation Point |
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GAW Data Policy
"For Scientific purposes, access to these data is unlimited and provided without charge.
By their use you accept that an offer of co-authorship will be made through personal contact with the data providers
or owners whenever substantial use is made of their data.
In all cases, an acknowledgement must be made to the data providers or owners and to the data centre when these data are used within a publication."
Citation format
This format is an example of the WDCGG standard citation.
Please follow the citation format which the data providers or owners indicate.
Please follow the citation format which the data providers or owners indicate.
Arnoud Frumau (TNO),
Arjan Hensen (TNO),
Alex Vermeulen (TNO),
Pim Van den Bulk (TNO),
Atmospheric CH4
at Cesar (Cabauw) by Integrated Carbon Observation System Research Infrastructure,
dataset published as CH4_CBW6117_tower-insitu_ICOS_tower207 at WDCGG,
ver. 2025-09-10-0001 (Reference date*: YYYY/MM/DD)
* As the reference date, please indicate the date you downloaded the files.
* As the reference date, please indicate the date you downloaded the files.
Reference(s)
| 1 | Hazan, L., Tarniewicz, J., Ramonet, M., Laurent, O., and Abbaris, A.: Automatic processing of atmospheric CO2 and CH4 mole fractions at the ICOS Atmosphere Thematic Centre, Atmos. Meas. Tech., 9, 4719-4736, doi:10.5194/amt-9-4719-2016, 2016. |
|---|---|
| 2 | Yver Kwok, C., Laurent, O., Guemri, A., Philippon, C., Wastine, B., Rella, C. W., Vuillemin, C., Truong, F., Delmotte, M., Kazan, V., Darding, M., Lebègue, B., Kaiser, C., Xueref-Rémy, I., and Ramonet, M.: Comprehensive laboratory and field testing of cavity ring-down spectroscopy analyzers measuring H2O, CO2, CH4 and CO, Atmos. Meas. Tech., 8, 3867–3892, https://doi.org/10.5194/amt-8-3867-2015, 2015. |
| 3 | Yver-Kwok, C., Philippon, C., Bergamaschi, P., Biermann, T., Calzolari, F., Chen, H., Conil, S., Cristofanelli, P., Delmotte, M., Hatakka, J., Heliasz, M., Hermansen, O., Komínková, K., Kubistin, D., Kumps, N., Laurent, O., Laurila, T., Lehner, I., Levula, J., Lindauer, M., Lopez, M., Mammarella, I., Manca, G., Marklund, P., Metzger, J.-M., Mölder, M., Platt, S. M., Ramonet, M., Rivier, L., Scheeren, B., Sha, M. K., Smith, P., Steinbacher, M., Vítková, G., and Wyss, S.: Evaluation and optimization of ICOS atmosphere station data as part of the labeling process, Atmos. Meas. Tech., 14, 89–116, https://doi.org/10.5194/amt-14-89-2021, 2021. |
