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Japan
Meteorological Agency (JMA)
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Methane Reference Gas Intercomparison in the 1st Round
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| In the 1st round intercomparison, the methane reference gases (Cylinder number: CPB13002, CPB13003) prepared in Japan in 2000 were circulated between 2001 and 2005 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 1st Round |
| Laboratory and Location | Date of Measurement |
Cylinder No. CPB13002 | Cylinder No. CPB13003 | Scale | Measu- rement Info |
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|---|---|---|---|---|---|---|---|---|---|
| Mole fraction (ppb) |
SD (ppb) |
N | Mole fraction (ppb) |
SD (ppb) |
N | ||||
| Asia 2001 | |||||||||
| JMA Headquarters, Tokyo |
Apr. 24-25, 2001 | 1809.7 *, ** | 1.1 | 10 | 1960.1 *, ** | 0.9 | 10 | NOAA04 | |
| CMA CGAWBO at Mt. Waliguan |
Jul. 21-24, 2001 | 1822.9 | 11.7 | 99 | 1980.5 | 9.8 | 99 | AES | |
| KMA KGAWO at Anmyeon-do |
Sep. 3-5, 2001 | 1786.4 | 1.1 | 45 | 1935.7 | 1.4 | 45 | CMDL | |
| JMA Headquarters, Tokyo |
Nov. 5-6, 2001 | 1810.8 *, ** | 1.6 | 10 | 1959.8 *, ** | 1.3 | 10 | NOAA04 | |
| South-West Pacific 2002-2003 | |||||||||
| JMA Headquarters, Tokyo |
Apr. 15-16, 2002 | 1810.3 *, ** | 1.3 | 10 | 1959.8 *, ** | 1.1 | 10 | NOAA04 | |
| CSIRO Aspendale, Australia |
Mar. 2003 | 1787.38 | 2.0 | 67 | 1937.33 | 2.1 | 72 | CSIRO1994 | |
| NIWA Wellington, New Zealand |
Jul. 2003 | 1817.84 | 1.79 | 10 | 1968.95 | 2.23 | 10 | NIST | |
| JMA Headquarters, Tokyo |
Dec. 15-16, 2003 | 1810.6 *, ** | 0.8 | 10 | 1959.3 *, ** | 1.7 | 10 | NOAA04 | |
| Japan 2004-2005 | |||||||||
| TU, Sendai | Sep. 28, 2004 | 1810.5 | 1.7 | 11 | 1961.2 | 1.6 | 11 | TU Gravimetric Scale | |
| NIES, Tsukuba | Dec. 20, 2004- Feb. 14, 2005 |
1812.1 | 1.4 | 84 | 1963.4 | 1.0 | 82 | NIES94 | |
| JMA Headquarters, Tokyo |
Mar. 3-8, 2005 | 1809.7 ** | 1.9 | 10 | 1960.3 ** | 1.7 | 10 | NOAA04 | |
| SD: Standard deviation; N: Number of measurements | ||
| Note: |
* means that JMA made a recalculation for the drift in JMA's ex-primary standards in November 2005. ** means that JMA made a recalculation for the adoption of the NOAA04 CH4 scale in October 2006. |
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| AES - | Atmospheric Environment Service (presently Meteorological Service of Canada (MSC)) |
| CGAWBO - | China Global Atmosphere Watch Baseline Observatory |
| CMDL - | Climate Monitoring and Diagnostics Laboratory (presently Global Monitoring Division (NOAA/ESRL)), U.S.A. |
| KGAWO - | Korea Global Atmosphere Watch Observatory |
| NIST - | National Institute of Standards and Technology, U.S.A. |
| 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 |
| Tohoku University (TU) | Japan | Contact |
| National Institute for Environmental Studies (NIES) | Japan | Contact |
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| Last Updated: 2013.03.27 |
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