Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29j.112l&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 10, pp. 112-1, CiteID 1474, DOI 10.1029/2001GL013955
Physics
10
Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry
Scientific paper
In order to assess the contribution of carbonyl sulfide to stratospheric sulfate aerosol (SSA), we examined the stratospheric OC34S and OC32S concentration profiles in the infrared limb-transmittance spectra acquired by the JPL MkIV instrument. We found that OC34S is preferentially depleted by solar photolysis. The derived 34S enrichment factor: ɛ = +73.8 +/- 8.6‰, in conjunction with literature values of δ34S ~ +11‰ for tropospheric OCS, and a ~ 10% net processing of the OCS transported upwardly into the stratosphere, suggests that aerosol sulfate proceeding from OCS should be highly enriched in δ34S ~ 80‰, comparing our prediction with previous reports of δ34S ~ +2.6‰ for background SSA, we infer either that OCS is a minor contributor to SSA or that current views about its 34S-abundance and atmospheric circulation are seriously flawed.
Colussi Agustín J.
Hoffmann Michael R.
Leung Fok-Yan T.
Toon Geoffrey C.
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