 |
Japan
Meteorological Agency (JMA)
|
 |
Methane Reference Gas Intercomparison in the 7th Round
|
|
|
| In the 7th round intercomparison, the methane reference gases (Cylinder number: CPD00568, CPD00567) prepared in Japan in 2019 were circulated in the order of Asia (2020-2022), the South-West Pacific (in planning) and Japan (in planning). The measurement results of the methane reference gases are summarized in Table 1. |
Table 1. Results of Methane Reference Gas Intercomparison in the 7th Round |
| Laboratory and Location | Date of Measurement |
Cylinder No. CPD00568 | Cylinder No. CPD00567 | Scale | GAW Report |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mole fraction (ppb) |
SD (ppb) |
U (ppb) |
N | Mole fraction (ppb) |
SD (ppb) |
U (ppb) |
N | ||||
| Asia 2020-2022 | |||||||||||
| JMA Headquarters, Tokyo |
Oct. 28, 2020 | 1806.84 | 0.06 | 0.09 | 5 | 1966.20 | 0.04 | 0.09 | 5 | WMO X2004A | Link |
| CMA(CRDS) Beijing, China |
Mar. 15, 2021 | 1807.1 | 0.20 | 0.05 | 3 | 1966.6 | 0.10 | 0.05 | 3 | WMO X2004A | |
| CMA(GC/FID) Beijing, China |
Mar. 19, 2021 | 1806.4 | 0.20 | 1.02 | 40 | 1966.0 | 1.80 | 1.02 | 40 | WMO X2004A | |
| KMA/NIMS Anmyeon-do, Rep. of Korea |
Jul. 27, 2021 - Oct. 18, 2021 | 1806.15 | 0.03 | 0.10 | 3 | 1965.90 | 0.01 | 0.10 | 3 | WMO X2004A | |
| JMA Headquarters, Tokyo |
Jan. 05, 2022 | 1806.89 | 0.08 | 0.09 | 5 | 1966.28 | 0.07 | 0.09 | 5 | WMO X2004A | |
| South-West Pacific 2024- (to be updated) | |||||||||||
| JMA Headquarters, Tokyo |
- | - | - | - | - | - | - | - | - | WMO X2004A | |
| NIWA Wellington, New Zealand |
- | - | - | - | - | - | - | - | - | WMO X2004A | |
| CSIRO Aspendale, Australia |
- | - | - | - | - | - | - | - | - | WMO X2004A | |
| NOAA/ESRL Boulder, U.S.A. |
- | - | - | - | - | - | - | - | - | WMO X2004A | |
| JMA Headquarters, Tokyo |
- | - | - | - | - | - | - | - | - | WMO X2004A | |
| Japan 2025- (to be updated) | |||||||||||
| JMA Headquarters, Tokyo |
- | - | - | - | - | - | - | - | - | WMO X2004A | |
| SD: Standard deviation; N: Number of measurements; U: Measurement uncertainty | ||
Table 2. Information on Participants |
| Participant (WEB Site) | Country |
| Japan Meteorological Agency (JMA) | Japan |
| China Meteorological Administration (CMA) | China |
| Korea Meteorological Administration (KMA) | Rep. of Korea |
| Commonwealth Scientific and Industrial Research Organisation (CSIRO) | Australia |
| National Institute of Water & Atmospheric Research Ltd. (NIWA) | New Zealand |
| National Oceanic and Atmospheric Administration/Earth System Research Laboratory (NOAA/ESRL) | U.S.A. |