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Japan
Meteorological Agency (JMA)
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Methane Reference Gas Intercomparison in the 4th Round
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| In the 4th round intercomparison, the methane reference gases (Cylinder number: CPB31288, CPB31289) prepared in Japan in 2011 were circulated in the order of Asia (2011-2012), the South-West Pacific (2013-2014) and Japan (2015-2016). The measurement results of the methane reference gases are summarized in Table 1. |
Table 1. Results of Methane Reference Gas Intercomparison in the 4th Round |
| Laboratory and Location | Date of Measurement |
Cylinder No. CPB31288 | Cylinder No. CPB31289 | Scale | Measu- rement Info |
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|---|---|---|---|---|---|---|---|---|---|
| Mole fraction (ppb) |
SD (ppb) |
N | Mole fraction (ppb) |
SD (ppb) |
N | ||||
| Asia 2011-2012 | |||||||||
| JMA Headquarters, Tokyo |
Jun. 8-9, 2011 | 1740.5 | 1.6 | 10 | 1878.1 | 1.5 | 10 | NOAA04 | |
| CMA CGAWBO at Mt. Waliguan |
Sep. 13, 2011 | 1741.2 | 0.9 | 3 | 1878.7 | 0.4 | 3 | NOAA04 | |
| Sep. 20, 2011 | 1740.6 | 0.1 | 4 | 1879.0 | 0.1 | 4 | NOAA04 | ||
| CMA CAMS, CMA, Beijing |
Oct. 14-17, 2011 | 1740.0 | 1.1 | 14 | 1879.1 | 0.5 | 17 | NOAA04 | |
| Oct. 20, 2011 | 1739.6 | 0.1 | 11 | 1878.8 | 0.1 | 11 | NOAA04 | ||
| KMA KGAWC, Korea |
Dec. 1, 2011 - Jan. 27, 2012 |
1739.2 | 0.88 | 10 | 1878.1 | 0.84 | 10 | NOAA04 | |
| JMA Headquarters, Tokyo |
Mar. 21-22, 2012 | 1740.2 | 0.9 | 10 | 1878.2 | 1.0 | 10 | NOAA04 | |
| South-West Pacific 2013-2014 | |||||||||
| JMA Headquarters, Tokyo |
Jun. 25, 2013 | 1738.3 | 1.0 | 10 | 1878.0 | 1.6 | 10 | NOAA04 | |
| CSIRO Aspendale, Australia |
Aug. 15-16, 20-21, 27-28, 2013 |
1738.2 | 0.5 | 107 | 1878.7 | 0.5 | 128 | NOAA04 | |
| NIWA Wellington, New Zealand |
Oct. 10,14, 2013 | 1738.9 | 1.2 | 20 | 1878.3 | 1.4 | 20 | NOAA04 | |
| NOAA/ESRL Boulder, U.S.A. |
Jan. 21 - Feb. 10, 2014 |
1740.0 | 0.7 | 5 | 1879.7 | 1.0 | 5 | NOAA04 | |
| JMA Headquarters, Tokyo |
Apr. 8, 2014 | 1738.1 | 1.6 | 10 | 1877.9 | 1.2 | 10 | NOAA04 | |
| Japan 2015-2016 | |||||||||
| JMA Headquarters, Tokyo |
Dec. 9, 2015 | 1738.1 | 1.4 | 10 | 1877.7 | 1.7 | 10 | WMO X2004A | |
| MRI Tsukuba, Japan |
Feb.12, 2016 | 1739.5 | 0.1 | 3 | 1880.5 | 0.09 | 3 | MRI | |
| AIST Tsukuba, Japan |
Apr. 2-9, 2016 | 1741.1 | 1.84 | 40 | 1880.9 | 1.65 | 39 | AIST | |
| NIES Tsukuba, Japan |
May 18-19, 2016 | 1742.0 | 0.1 | 24 | 1882.4 | 0.2 | 24 | NIES94 | |
| JMA Headquarters, Tokyo |
Aug. 15, 2016 | 1738.1 | 1.5 | 10 | 1876.9 | 1.6 | 10 | WMO X2004A | |
| SD: Standard deviation; N: Number of measurements | ||
| CGAWBO - | China Global Atmosphere Watch Baseline Observatory |
| CAMS - | Chinese Academy of Meteorological Science |
| KGAWC - | Korea Global Atmosphere Watch Center |
| NOAA - | National Oceanic and Atmospheric Administration, U.S.A. |
Table 2. Information on Participants and their Contact |
| Participant (WEB Site) | Country | Information |
| Japan Meteorological Agency (JMA) | Japan | Contact |
| China Meteorological Administration (CMA) | China | Contact |
| Korea Meteorological Administration (KMA) | Rep. of Korea | Contact |
| Commonwealth Scientific and Industrial Research Organisation (CSIRO) | Australia | Contact |
| National Institute of Water & Atmospheric Research Ltd. (NIWA) | New Zealand | Contact |
| National Oceanic and Atmospheric Administration/Earth System Research Laboratory (NOAA/ESRL) | U.S.A. | Contact |
| Meteorological Research Institute (MRI) | Japan | Contact |
| National Institute of Advanced Industrial Science and Technology (AIST) | Japan | Contact |
| National Institute for Environmental Studies (NIES) | Japan | Contact |
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| Last Updated: 2017.11.29 |
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