Global distributions of carbonyl sulfide in the upper troposphere and stratosphere

Michael P. Barkley; Paul I. Palmer; Chris D. Boone; Peter F. Bernath; Parvadha Suntharalingam

doi:10.1029/2008GL034270

Global distributions of carbonyl sulfide in the upper troposphere and stratosphere

Michael P. Barkley, Paul I. Palmer, Chris D. Boone, Peter F. Bernath, Parvadha Suntharalingam

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

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).

Original language	English
Article number	L14810
Pages (from-to)	-
Number of pages	7
Journal	Geophysical Research Letters
Volume	35
Issue number	14
DOIs	https://doi.org/10.1029/2008GL034270
Publication status	Published - 26 Jul 2008

Keywords

AEROSOLS
LAYER
MASS
COS

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10.1029/2008GL034270

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abstract = "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).",

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AU - Barkley, Michael P.

AU - Palmer, Paul I.

AU - Boone, Chris D.

AU - Bernath, Peter F.

AU - Suntharalingam, Parvadha

PY - 2008/7/26

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AB - 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).

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JO - Geophysical Research Letters

JF - Geophysical Research Letters

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Global distributions of carbonyl sulfide in the upper troposphere and stratosphere

Abstract

Keywords

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