Atmospheric halocarbons in the southern Hemisphere

This paper reports atmospheric CCl 3F, CCl 4 and CH 3CCl 3 concentration measurements obtained during 12 months of aircraft sampling and 6 months of surface measurements in Australia. These are preliminary results of a continuing programme aimed at describing the Southern Hemisphere atmospheric cont...

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Bibliographic Details
Published in:Atmospheric environment 1978, Vol.12 (4), p.839-844
Main Authors: Fraser, P.J.B., Pearman, G.I.
Format: Article
Language:English
Subjects:
Air Pollutants - analysis
Australia
Hydrocarbons, Halogenated - analysis
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Summary:This paper reports atmospheric CCl 3F, CCl 4 and CH 3CCl 3 concentration measurements obtained during 12 months of aircraft sampling and 6 months of surface measurements in Australia. These are preliminary results of a continuing programme aimed at describing the Southern Hemisphere atmospheric content of these gases and their variation in space and time, which relate to large scale atmospheric circulation. Average tropospheric concentrations at the end of 1976 were, for CCl 3F, 120 pptv (parts per trillion (10 12) by volume); for CC1 4, 159 pptv; and for CH 3CCl 3, 40–60 pptv. CCl 3F concentrations are increasing at a rate of 19% yr −1. A large scale interhemispheric eddy diffusion coefficient of 0.5 × 10 6s −1 is inferred from recent CCl 3F data and compared with other published values.
ISSN:0004-6981
1352-2310
DOI:10.1016/0004-6981(78)90021-5