Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29i..73a&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 9, pp. 73-1, CiteID 1359, DOI 10.1029/2002GL014796
Physics
11
Atmospheric Composition And Structure: Instruments And Techniques, Atmospheric Composition And Structure: Constituent Sources And Sinks, Global Change: Atmosphere (0315, 0325), Atmospheric Composition And Structure: Troposphere-Composition And Chemistry
Scientific paper
The concentration of carbonyl sulfide (OCS) has been determined in several preindustrial air samples extracted from a shallow ice core from Siple Dome, West Antarctica. The extraction of the air was carried out by shredding the core under vacuum, followed by analysis by gas chromatography with mass spectrometric detection. 11 ice core samples were analyzed, ranging in depth from 82.3 to 90.7 m. The ages assigned to OCS in the ice core samples range from 1616 to 1694 AD. The observed OCS mixing ratios range from 322.6 pptv to 442.3 pptv with a mean of 372.8 +/- 37.2 pptv. These levels are significantly lower than the present day atmospheric mixing ratio of 500 pptv and suggest that the anthropogenic sources comprise approximately 25% of the present day OCS budget.
Aydin Murat
de Bruyn Warren J.
Saltzman Eric S.
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