Japan Meteorological Agency (JMA)
Methane Reference Gas Intercomparison in the 3rd Round

In the 3rd round intercomparison, the methane reference gases (Cylinder number: CPB13002, CPB13003) prepared in Japan in 2008 were circulated between 2008 and 2013 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 3rd Round

Laboratory and Location Date of
Measurement
Cylinder No. CPB13002 Cylinder No. CPB13003 Scale Measu-
rement
Info
Mole
fraction (ppb)
SD
(ppb)
N Mole
fraction (ppb)
SD
(ppb)
N
Asia 2008-2009
JMA
Headquarters, Tokyo
May 1-2, 2008 1664.4 1.2 10 1848.3 1.8 10 NOAA04 PDF
KRISS, Daejeon Sep. -Nov., 2008 1665.1 0.2 5 1851.2 0.2 5 KRISS PDF
KMA
KGAWC, Korea
Oct. -Nov., 2008 1665.6 1.2 12 1851.3 1.4 12 KRISS PDF
CMA
CGAWBO at Mt. Waliguan
Apr. 3-5, 2009 1661.1 0.9 14 1847.0 0.8 14 NOAA04 PDF
Apr. 13-14, 2009 1662.3 0.2 9 1847.2 0.3 9 NOAA04 PDF
Apr. 14-16, 2009 1659.3 5.2 10 1846.1 1.9 10 NOAA04 PDF
CMA
CAMS, CMA, Beijing
Apr. 28-29, 2009 1661.9 2.0 10 1847.5 0.6 10 NOAA04 PDF
Apr. 29, 2009 1662.5 0.2 9 1847.3 0.1 9 NOAA04 PDF
Apr. 30, 2009 1662.2 1.6 12 1847.2 1.8 12 NOAA04 PDF
JMA
Headquarters, Tokyo
Jul. 1-2, 2009 1664.3 1.1 10 1846.7 1.7 10 NOAA04 PDF
South-West Pacific 2010-2011
JMA
Headquarters, Tokyo
Apr. 26-27, 2010 1664.2 1.1 10 1847.1 1.7 10 NOAA04 PDF
CSIRO
Aspendale, Australia
Jun. 21-24, 29-30,
2010
1664.7 0.5 133 1847.2 0.5 143 NOAA04 PDF
NIWA
Wellington, New Zealand
Oct. 14,19, 2010 1663.432 1.033 33 1845.641 1.038 33 NOAA04 PDF
JMA
Headquarters, Tokyo
Feb. 14-15, 2011 1664.3 1.4 10 1846.6 1.8 10 NOAA04 PDF
Japan 2012-2013
JMA
Headquarters, Tokyo
Oct. 11-12, 2012 1664.2 1.5 10 1844.8 1.1 10 NOAA04 PDF
NiPR, Tokyo Oct. 18-23, 2012 1661.7 2.6 16 1845.7 1.9 16 NIPR PDF
AIST, Tsukuba Nov. 12-18, 2012 1665.4 1.50 48 1847.9 1.25 47 AIST PDF
MRI, Tsukuba Nov. 2-6, Dec. 5-6, 2012 1663.8 1.07 3 1845.9 0.83 3 MRI PDF
NIES, Tsukuba Dec. 14-17, 2012 1665.81 0.90 27 1849.95 0.53 27 NIES94 PDF
TU, Sendai Jan. 12-13, 23-24, 2013 1663.6 1.1 15 1848.8 1.3 24 TU-X08 PDF
JMA
Headquarters, Tokyo
Feb. 7-8, 19-20, 2013 1664.0 1.7 10 1845.6 1.9 10 NOAA04 PDF
SD: Standard deviation; N: Number of measurements  
KGAWC - Korea Global Atmosphere Watch Center
CGAWBO - China Global Atmosphere Watch Baseline Observatory
CAMS - Chinese Academy of Meteorological Science
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
Korea Research Institute of Standards and Science (KRISS) Rep. of Korea Contact
Korea Meteorological Administration (KMA) Rep. of Korea Contact
China Meteorological Administration (CMA) China Contact
Commonwealth Scientific and Industrial Research Organisation (CSIRO) Australia Contact
National Institute of Water & Atmospheric Research Ltd. (NIWA) New Zealand Contact
National Institute of Polar Research (NiPR) Japan Contact
National Institute of Advanced Industrial Science and Technology (AIST) Japan Contact
Meteorological Research Institute (MRI) Japan Contact
National Institute for Environmental Studies (NIES) Japan Contact
Tohoku University (TU) Japan Contact


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Last Updated: 2013.03.27
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