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Atmospheric SO/sub 2/ measurements on Project GAMETAG

Journal Article · · J. Geophys. Res.; (United States)
On the 1978 Global Atmospheric Measurement Experiment of Tropospheric Aerosols and Gases (GAMETAG) flights, 201 measurements of the tropospheric concentration of SO/sub 2/ were made over a latitude range 57 degrees S to 70 degrees N. The area sampled included the central and the southern Pacific Ocean and the western section of the United States and Canada. Sulfur dioxide levels averaged 89 +- 69 pptv in the boundary layer and 122 +- 85 pptv in the free troposphere in the northern hemisphere. In the southern hemisphere, SO/sub 2/ concentrations averaged 57 +- 18 pptv in the boundary layer and 90 +- 21 pptv in the free troposphere. The mean concentration of the continental data was 112 +- 79 pptv in the boundary layer and 160 +- 100 pptv in the free troposphere. The SO/sub 2/ marine values were 54 +- 19 pptv in the boundary layer and 85 +- 28 pptv in the free troposphere. From a simple chemical model we conclude that a significant amount of background SO/sub 2/ may originate from the oxidation of OCS.
OSTI ID:
5529190
Journal Information:
J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 85:C12; ISSN JGREA
Country of Publication:
United States
Language:
English