In line with the GAW Data Policy, users should contact the contributors of all data of interest and propose co-authorship or acknowledgement.
Organization
| NO | 48 |
|---|---|
| Acronym | MRI |
| Name | Meteorological Research Institute |
| Address 1 | Department of Climate and Geochemistry Research |
| Address 2 | Meteorological Research Institute |
| Address 3 | 1-1 Nagamine, Tsukuba, 305-0052, Japan |
| Country/Territory | Japan |
| Website | https://www.mri-jma.go.jp/index_en.html |
Contact(s)
| Name | Kazuhiro Tsuboi |
|---|---|
| Prefix | Mr. |
| ktsuboi@mri-jma.go.jp | |
| Organization No | 48 |
| Organization acronym | MRI |
| Organization name | Meteorological Research Institute |
| Organization country/territory | Japan |
| Address 1 | 1-1, Nagamine |
| Address 2 | Tsukuba |
| Address 3 | Ibaraki 305-0052 |
| Country/territory | Japan |
| Tel | +81-29-853-8720 |
| Fax | |
| Last updated date | 2024-08-13 |
| Unknown | |
| Unknown | |
| ppt | |
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9999-12-31 00:00:00 - 9999-12-31 23:59:59: SHIMADZU 6AM (Gas chromatography (ECD)) |
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| event | |
| A reference gas was made by diluting pure SF6 (Takachiho, >99.8%) with pure N2 into a tedlar bag(20l). By a two-step static dilution, a reference gas of SF6 in N2 was made. The SF6 in the tedlar bag was constant in a few days. The error in repeated measurements at 1.0ppt (sample size: 2ml) was 10%. In practice, volume mixing ratios of SF6 were calculated from those of CCl2F2 by making use of the fact that the peak height of SF6 was about 20 times higher than that of CCl2F2, which was eluted about 20s after SF6. Therefore, a mixed gas of 20ppm CCl2F2 and 20ppm CCl3F in pure N2 (Nihon Sanso) were used as a primary reference gas. In the measurement of the sensitivity ratio, a mixed gas of 10ppt SF6 and 400ppt CCl2F2 in pure N2 was used. | |
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Higher mixing ratios were often observed over urban areas up to an altitude of 2km. The mean tropospheric mixing ratio for each observation flight was calculated excluding those values below an altitude of 2km. |
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[Hourly] [Daily] [Monthly] |
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-99 : Valid * : The sampled air might be contaminated with a room air (Because the mixing ratio of CFCl3 in the same sample was also high). |
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Valid: * |
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| Temporarily suspended | |
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The air sampled on 1983.2.7, 11:46 at the height of 7000 m might be contaminated with a room air, because the mixing ratio of CFCl3 in the same sample was also high. Air samples were collected on an Aircraft (Aerocommander 685 or Cessna 404) into stainless steel cylinders up to an altitude of 8km in February and December 1982, and February 1983. Background concentration over Japan and its long-term trend. This dataset was submitted to WDCGG by Michio Hirota on 2001/7/31. Dr. Hirota retired from Japan Meteorological Agency in 2008. |
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Wind direction: 0 Wind speed: 0 Relative humidity: 0 Precipitation amount: 0 Air pressure: 1 Air temperature: 0 Dew point temperature: 0 Sea water temperature: 0 Sea surface water temperature: 0 Sea water salinity: 0 Sea surface water salinity: 0 |
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Meteorological data may remain as first provided, even when greenhouse gas data are updated. The file was made using the former WDCGG data file. |
No DOI available
Related information
GAW Data Policy
"For Scientific purposes, access to these data is unlimited and provided without charge.
By their use you accept that an offer of co-authorship will be made through personal contact with the data providers
or owners whenever substantial use is made of their data.
In all cases, an acknowledgement must be made to the data providers or owners and to the data centre when these data are used within a publication."
Citation format
This format is an example of the WDCGG standard citation.
Please follow the citation format which the data providers or owners indicate.
Please follow the citation format which the data providers or owners indicate.
Kazuhiro Tsuboi (MRI),
Atmospheric SF6
by Aircraft (over Japan and surroundings), Meteorological Research Institute,
dataset published as SF6_OAS_
aircraft-flask_MRI_data1 at WDCGG,
ver. 2024-08-13-0923 (Reference date*: YYYY/MM/DD)
* As the reference date, please indicate the date you downloaded the files.
* As the reference date, please indicate the date you downloaded the files.
Reference(s)
| 1 | Hirota M. and H. Muramatsu, 1989: Gas-chromatographic measurements of atmospheric sulfur hexafluoride, Bull. Chem. Soc. Japan, 59, 329-331. |
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