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 Organization

NO 1
Acronym JMA
Name Japan Meteorological Agency
Address 1
Address 2 Global Environment and Marine Department
Address 3 1-3-4 Ote-machi, Chiyoda-ku, Tokyo 100-8122
Country/Territory Japan
Website https://www.jma.go.jp/jma/indexe.html

 Contact(s)

Name Kazuyuki SAITO
Prefix Mr.
Email ghg_obs@met.kishou.go.jp
Organization No 1
Organization acronym JMA
Organization name Japan Meteorological Agency
Organization country/territory Japan
Address 1 1-3-4 Otemachi
Address 2 Chiyoda-ku
Address 3 Tokyo 100-8122
Country/territory Japan
Tel +81-3-3287-3439
Fax +81-3-3211-8309
Last updated date 2019-10-09


 Background observation
 UTC+09:00
 ppm
 1993-01-01 00:00:00 - 9999-12-31 23:59:59: WMO CO2 X2007
 1993-01-01 00:00:00 - 2009-12-31 23:59:59: HORIBA, Ltd. VIA-510R(NDIR)
 2010-01-01 00:00:00 - 9999-12-31 23:59:59: LI-COR Biosciences, Inc. LI-7000(NDIR)
 1993-01-01 00:00:00 - 9999-12-31 23:59:59: 20 (m)
 30 seconds
 The quadratic fitting curve is determined every 2 hours by a set of 5 working standard gases of CO2-in-natural air mixtures in different concentrations. The mole fraction is determined by this fitting curve.
 The raw data from instrument is collected by the data acquisition system, and stored in the system as every 30 seconds raw data. CO2 measurements are checked at the site by an operator every day. All irregular measurements and information are recorded in a log book. Measurement data are transmitted to the headquarters every month and are checked again there. Finally, the measurement data are checked and validated by the contributor at the headquarters. For the working standard gases and sample air, analyzer output voltages measured every second are averaged over 30 seconds.
 [Hourly] Hourly data are taken from the arithmetic mean of observed data for one hour after the irregular and evident error data are rejected. For the details of background hourly data, please refer to https://www.data.jma.go.jp/gmd/env/ghg_obs/JMA_flag.html
 [Daily] Daily data are taken from the arithmetic mean of background hourly data. For the details of background hourly data, please refer to https://www.data.jma.go.jp/gmd/env/ghg_obs/JMA_flag.html
 [Monthly] Monthly data are taken from the arithmetic mean of background hourly data. For the details of background hourly data, please refer to https://www.data.jma.go.jp/gmd/env/ghg_obs/JMA_flag.html
 Hourly data
0-6: no background condition
7: background condition
9: missing
Daily and Monthly data
2: no valid hourly data
3: valid 9: missing
For the details, please refer to
https://www.data.jma.go.jp/gmd/env/ghg_obs/JMA_flag.html
 Operational/Reporting
 Continuous flow of 0.5 liters per minute, data is analyzed every 30 seconds.
1  Tsutsumi, Y., H. Matsueda, S. Nishioka, Consistency of the CO2 primary standards in JMA, 12th WMO/IAEA meeting of experts on carbon dioxide concentration and related tracers measurement techniques (Toronto, Canada, 15-18 September 2003), Global Atmosphere Watch Report No. 161 (WMO/TD-No.1275), 23-31, 2005.
2  F. Watanabe, O. Uchino, Y. Joo, M. Aono, K. Higashijima, Y. Hirano, K. Tsuboi and K. Suda: Interannual variation of growth rate of atmospheric carbon dioxide concentration observed at the JMA's three monitoring stations: Large increase in concentration of atmospheric carbon dioxide in 1998. Journal of Meteorological Society of Japan, Vol.78, No.5. 673-682, 2000.
3  JMA, Observation method of the greenhouse gas http://www.data.jma.go.jp/gmd/env/ghg_obs/en/