Article (Scientific journals)
Positive trends in Southern Hemisphere carbonyl sulfide
Kremser, Stefanie; Jones, Nicholas B.; Palm, Mathias et al.
2015In Geophysical Research Letters, 42, p. 9473-9480
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Keywords :
carbonyl sulfide; trends; ground-based measurements
Abstract :
[en] Transport of carbonyl sulfide (OCS) from the troposphere to the stratosphere contributes sulfur to the stratospheric aerosol layer, which reflects incoming short-wave solar radiation, cooling the climate system. Previous analyses of OCS observations have shown no significant trend, suggesting that OCS is unlikely to be a major contributor to the reported increases in stratospheric aerosol loading and indicating a balanced OCS budget. Here we present analyses of ground-based Fourier transform spectrometer measurements of OCS at three Southern Hemisphere sites spanning 34.45°S to 77.80°S. At all three sites statistically significant positive trends are seen from 2001 to 2014 with an observed overall trend in total column OCS at Wollongong of 0.73 ± 0.03%/yr, at Lauder of 0.43 ± 0.02%/yr, and at Arrival Heights of 0.45 ± 0.05%/yr. These observed trends in OCS imply that the OCS budget is not balanced and could contribute to constraints on current estimates of sources and sinks.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Kremser, Stefanie
Jones, Nicholas B.
Palm, Mathias
Lejeune, Bernard ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Wang, Yuting
Smale, Dan
Deutscher, Nicholas M.
Language :
English
Title :
Positive trends in Southern Hemisphere carbonyl sulfide
Publication date :
06 November 2015
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
American Geophysical Union, Washington, United States - District of Columbia
Volume :
42
Pages :
9473-9480
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Royal Society of New Zealand
NIWA
ARC - Australian Research Council [AU]
EU project StratoClim
German Research council
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