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
2025-07-05-1156 (Last updated: 2025-07-11)File
This data set is submitted by MGO.
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 | 46 |
|---|---|
| Acronym | MGO |
| Name | Voeikov Main Geophysical Observatory |
| Address 1 | |
| Address 2 | Voeikov Main Geophysical Observatory |
| Address 3 | St. Petersburg, Karbyshev Street 7, Russian Federation, 194021 |
| Country/Territory | Russian Federation |
| Website | http://voeikovmgo.ru/index.php?lang=en |
Contact(s)
| Name | Nina Paramonova |
|---|---|
| Prefix | |
| nina-paramonova@mail.ru | |
| Organization No | 46 |
| Organization acronym | MGO |
| Organization name | Voeikov Main Geophysical Observatory |
| Organization country/territory | Russian Federation |
| Address 1 | |
| Address 2 | Voeikov Main Geophysical Observatory |
| Address 3 | St. Petersburg, Karbyshev Street 7, Russian Federation, 194021 |
| Country/territory | Russian Federation |
| Tel | +7-813-70-75-293 |
| Fax | +7-813-70-75-135 |
| Last updated date | 2025-07-05 |
| Name | Viktor Ivakhov |
|---|---|
| Prefix | |
| ivakhooo@mail.ru | |
| Organization No | 46 |
| Organization acronym | MGO |
| Organization name | Voeikov Main Geophysical Observatory |
| Organization country/territory | Russian Federation |
| Address 1 | |
| Address 2 | |
| Address 3 | |
| Country/territory | Russian Federation |
| Tel | |
| Fax | |
| Last updated date | 2025-07-05 |
| Background observation | |
| UTC+03:00 | |
| ppb | |
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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: TZVET-500M, Dzerjinsk, Russia No48(Gas chromatography (FID)) |
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9999-12-31 00:00:00 - 9999-12-31 23:59:59: 2 (m) |
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| weekly | |
| GC measurement cycle consists of a working standard gas injection followed by sampled air injection. Measurement procedure for each flask sample consists of five cycles. Working standard gas is calibrated against laboratory standard ones a day during flask measurements. | |
| Uncertainties of the CH4 measurements are included. Key components of it are our ability to propagate the WMO XCH4 scale to working standards, the repeatability of the analyzers used for sample measurement, and the long-term reproducibility. The typical repeatability of the analyzers, based on repeated measurements of natural air from a high-pressure cylinder, is +/- 1 ppb for MGO GC. Long-term reproducibility is estimated to be +/- 0.5 ppb based on repeated measurements of air from a high-pressure cylinder, or the long-term variability in the differences between measurements of test flasks on the flask-air analysis system and separate measurements of the test gas used to fill the test flasks. The scale propagation uncertainty is estimated to be 1 ppb, based on the reproducibility determined for scale propagation in MGO laboratory. The indicated uncertainty is confirmed by the results of RR#6 WMO intercomparison. | |
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[Hourly] [Daily] [Monthly] Monthly data are the arithmetic mean of selected according to flag description event data. |
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Flag description: Retained: + . : Concentration difference in two simultaneously sampled flasks is less than established criteria (1 ppmv for CO2 and 6 ppb for CH4). The reported data are the mean of the two measured concentrations. S . : Concentration difference in two simultaneously sampled flasks is more than established criteria. The reported data are the lower of the two measured concentrations. M. : Only one concentration is available, second flask is off scale or broken. Rejected: .X : rejected as not representative of background conditions (>2 sigma from the smoothed concentration curve) .Z : rejected manually as not representative of background condition. .N : rejected due to error in sampling or analysis. |
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Invalid: .N Invalid: +X Invalid: +Z Invalid: +N Invalid: SX Invalid: SZ Invalid: SN Invalid: MX Invalid: MZ Invalid: MN Valid (background): +. Valid (background): S. Valid (background): M. Invalid: .X Invalid: .Z |
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| Operational/Reporting | |
| Methane (CH4) in ambient and standard air samples is detected using gas chromatography (GC). Air samples are injected into a gas chromatograph (GC) with a sampling valve (volume is 2ml ). Methane (CH4) is separated from other sample constituents using CARBORUS carbon molecular sieve analytical column (50cm length, 3mm inner diameter) and detected using flame ionization (FID). FID temperature is about 150oC. The measurement of CH4 in air is made relative to working standard whose CH4 mole fraction is determined with high precision and accuracy. Calibration of working standard is made against standards from IUP of Heidelberg University and from2010 directly WMO CCL standards. Repeatability of MGO measurements, based on repeated analysis of air from a high-pressure cylinder, has ranged from 1 to 4 nmol/mol over the period of our measurements. The absolute accuracy of MGO scale is estimated at about 3 nmol/mol., that is confirmed by the results of WMO Round Robin 6 (2014-2015) Comparison Experiment (https://www.esrl.noaa.gov/gmd/ccgg/wmorr/wmorr_results.php).The samples are collected into two evacuated flasks simultaneously. Stainless steel flasks with electropolished inner walls of 1.5l volume are used. | |
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Wind direction: 1 Wind speed: 1 Relative humidity: 1 Precipitation amount: 0 Air pressure: 0 Air temperature: 1 Dew point temperature: 0 Sea water temperature: 0 Sea surface water temperature: 0 Sea water salinity: 0 Sea surface water salinity: 0 |
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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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| Version |
2025-07-05-1156 (Data Version History) * DOIs and file names may have multiple versions. Be sure to check the data version. |
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| Title | Atmospheric CH4 at Teriberka by Voeikov Main Geophysical Observatory, dataset published as CH4_TER6003_surface-flask_MGO_data1 at WDCGG | ||||||||||||
| Creator |
Voeikov Main Geophysical Observatory Nina Paramonova (MGO) Viktor Ivakhov (MGO) |
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| Publisher | World Data Centre for Greenhouse Gases | ||||||||||||
| Publication Date | 2018-06-22 (Last Updated: 2025-07-11) | ||||||||||||
| Format | Text (WDCGG Data Format Table, WDCGG Meteorological Data Format Table), NetCDF | ||||||||||||
| Relation List (Is Part Of) |
All CH4 data contributed to WDCGG by GAW stations and mobiles by 2024-09-24 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2023-09-13 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2022-09-07 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2021-08-27 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2020-09-28 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2019-09-19 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2018-10-25 |
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| 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.
Nina Paramonova (MGO),
Viktor Ivakhov (MGO),
Atmospheric CH4
at Teriberka by Voeikov Main Geophysical Observatory
,
dataset published as CH4_TER6003_
surface-flask_MGO_data1 at WDCGG,
ver. 2025-07-05-1156, https://doi.org/10.50849/WDCGG_0046-6003-1002-01-02-9999 (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 | Ivakhov V.*, Privalov V.*, Paramonova N.*, Makarova M.**, Poberovsky A.**, (2015). Results of methane concentration measurements in the vicinity of Saint-Petersburg, Russia by the Main Geophysical Observatory (*) and Saint-Petersburg State University (**). In: InGOS International Conference on non-CO2 Greenhouse Gases. Utrecht, The Netherlands, p. 82. |
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