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 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
Email reshal@peterlink.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 2021-07-06


 Background observation
 UTC+09:00
 ppb
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: WMO CH4 X2004A
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: TZVET-500M, Dzerjinsk, Russia No48(Gas chromatography (FID))
 9999-12-31 00:00:00 - 2013-12-31 23:59:59: 2 (m)
 2014-01-01 00:00:00 - 9999-12-31 23:59:59: 10 (m)
 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.
 The reported data are the mean of the CH4 concentrations measured in two simultaneously sampled flask, if the difference between them is less or equal to 6 ppb. Otherwise, the lower of the two measured values is taken as a daily value if it does not differ from the smoothed concentration curve for more than 2 standard deviations. Technically invalid data are excluded.
 [Hourly]
 [Daily]
 [Monthly] Monthly data are the arithmetic mean of selected according to flag description event data.
 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.
 Valid (background): +.
 Valid (background): S.
 Valid (background): M.
 Invalid: .X
 Invalid: .Z
 Invalid: .N
 Invalid: +X
 Invalid: +Z
 Invalid: +N
 Invalid: SX
 Invalid: SZ
 Invalid: SN
 Invalid: MX
 Invalid: MZ
 Invalid: MN
 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 were used in 2011-2013. From 2014 the NOAA ESRL glass flasks of 2l volume are used.
 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:
Meteorological data may remain as first provided, even when greenhouse gas data are updated.
 
No DOI available

 Related information

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 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
Geolocation Point
Latitude (north: +; south: -) 71.5861663818
Longitude (east: +; west: -) 128.9188232422

 Reference(s)

No data available