| Autor: |
Yasumi Fujinuma, Yoko Inuzuka, Hajime Akimoto, Hong-Jun Li, Yukihiro Nojiri, Shuji Aoki, Yoko Yokouchi, Leonard A. Barrie, Toshinobu Machida, D. Toom-Sauntry |
| Rok vydání: |
2000 |
| Předmět: |
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| Zdroj: |
Geophysical Research Letters. 27:697-700 |
| ISSN: |
0094-8276 |
| DOI: |
10.1029/1999gl010884 |
| Popis: |
The global distribution of atmospheric methyl bromide (CH 3 Br) obtained from extensive new measurements of atmospheric CH 3 Br from latitude 82.5°N to 69.1°S, showed a small decrease from mid- to high-latitudes, a gradient between the northern and southern hemispheres with a ratio of 1.2 to 1.3, and occasional high concentrations in the tropics. The observed data and modeled distributions of industrial CH 3 Br were used to apportion CH 3 Br between natural and industrial components for both hemisphere. We obtained an estimated man-made contribution of 4.3 pptv and 2.3 pptv in the northern and southern hemispheres, respectively and a natural (non-industrial) background concentration in both hemispheres of 6 pptv with a slight increase in the tropics. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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