Physics
Scientific paper
Jul 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3514810b&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 14, CiteID L14810
Physics
7
Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry, Atmospheric Composition And Structure: Troposphere: Composition And Chemistry, Global Change: Sea Level Change (1222, 1225, 4556), Biogeosciences: Trace Gases, Biogeosciences: Sulfur Cycling
Scientific paper
We present the first upper tropospheric and stratospheric global distributions of carbonyl sulfide (OCS) observed from space using solar occultation measurements made by the Atmospheric Chemistry Experiment (ACE) satellite Fourier transform spectrometer during 2004-2006. We observe high OCS mixing ratios (>400 pptv) within the tropical stratosphere owing to convected tropospheric air. Stratospheric mixing ratios decrease more rapidly with altitude moving away from the Equator, creating a poleward gradient. Elevated OCS concentrations observed at low southern latitudes are consistent with a significant pyrogenic source. Using coincident ACE measurements of CFC-11 and CFC-12 we determine a global OCS stratospheric lifetime of 64 +/- 21 years corresponding to a stratospheric sink of 63-124 Gg OCS yr-1.
Barkley Michael P.
Bernath Peter F.
Boone Chris D.
Palmer Paul I.
Suntharalingam Parvadha
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