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Japan
Meteorological Agency (JMA)
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Methane Reference Gas Intercomparison in the 2nd Round
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| In the 2nd round intercomparison, the methane reference gases (Cylinder number: CPB31288, CPB31289) prepared in Japan in 2005 were circulated between 2005 and 2009 in the order of Asia, the South-West Pacific and Japan. The measurement results of the methane reference gases are summarized in Table 1. |
Table 1. Results of Methane Reference Gas Intercomparison in the 2nd Round |
| Laboratory and Location | Date of Measurement |
Cylinder No. CPB31289 | Cylinder No. CPB31288 | Scale | Measu- rement Info |
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|---|---|---|---|---|---|---|---|---|---|
| Mole fraction (ppb) |
SD (ppb) |
N | Mole fraction (ppb) |
SD (ppb) |
N | ||||
| Asia 2005-2006 | |||||||||
| JMA Headquarters, Tokyo |
Jul. 6-7, 2005 | 1695.3 ** | 1.6 | 10 | 1874.2 ** | 1.8 | 10 | NOAA04 | |
| CMA CGAWBO at Mt. Waliguan |
Feb. 2006 | 1670.1 | 1.9 | 103 | 1845.4 | 2.3 | 167 | AES | |
| KMA KGAWO at Anmyeon-do |
Apr. 18-27, 2006 | 1695.8 | 1.5 | 70 | 1872.7 | 1.4 | 80 | KRISS | |
| KRISS, Daejeon | Jun. 26-30, 2006 | 1698.3 | 1.2 | 9 | 1877.1 | 0.9 | 8 | KRISS | |
| JMA Headquarters, Tokyo |
Aug. 21-22, 2006 | 1695.9 ** | 1.1 | 10 | 1874.9 ** | 0.7 | 9 | NOAA04 | |
| South-West Pacific 2006-2008 | |||||||||
| JMA Headquarters, Tokyo |
Dec. 25-26, 2006 | 1695.6 | 1.0 | 10 | 1875.5 | 1.2 | 10 | NOAA04 | |
| CSIRO Aspendale, Australia |
Jan. 31-Mar. 28, 2007 |
1695.0 | 0.8 | 68 | 1875.7 | 0.8 | 80 | NOAA04 | |
| NIWA Wellington, New Zealand |
Mar. 12, 2008 | 1692.54 | 1.88 | 10 | 1874.31 | 1.87 | 10 | NOAA04 | |
| JMA Headquarters, Tokyo |
Aug. 18-19, 2008 | 1696.2 | 1.6 | 10 | 1875.3 | 1.8 | 10 | NOAA04 | |
| Japan 2009-2010 |
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| JMA Headquarters, Tokyo |
Jun. 17-18, 2009 | 1697.1 | 1.6 | 10 | 1874.8 | 1.8 | 10 | NOAA04 | |
| NIES, Tsukuba | Oct. 4-6, 2009 | 1697.3 | 0.8 | 36 | 1877.9 | 0.5 | 36 | NIES94 | |
| TU, Sendai | Nov. 9 -Dec. 4, 2009 |
1697.1 | 1.3 | 42 | 1877.2 | 1.2 | 42 | TU Gravimetric Scale | |
| JMA Headquarters, Tokyo |
Jan. 28-29, 2010 | 1695.1 | 1.0 | 10 | 1875.4 | 1.1 | 10 | NOAA04 | |
| SD: Standard deviation; N: Number of measurements | ||
| Note: | ** means that JMA made a recalculation for the adoption of the NOAA04 CH4 scale in October 2006. | |
| AES - | Atmospheric Environment Service (presently Meteorological Service of Canada (MSC)) |
| CGAWBO - | China Global Atmosphere Watch Baseline Observatory |
| KGAWO - | Korea Global Atmosphere Watch Observatory |
| 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 |
| Korea Research Institute of Standards and Science (KRISS) | 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 Institute for Environmental Studies (NIES) | Japan | Contact |
| Tohoku University (TU) | Japan | Contact |
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| Last Updated: 2013.03.27 |
| E-mail: |