Preindustrial atmospheric carbonyl sulfide (OCS) from an Antarctic ice core

被引：25

作者：

Aydin, M ^{[1
]}

De Bruyn, WJ ^{[1
]}

Saltzman, ES ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2002年 / 29卷 / 09期

关键词：

D O I：

10.1029/2002GL014796

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

[1] 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.

引用

页数：4

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