17O/16O and 18O/16O isotope measurements of atmospheric carbon monoxide and its sources

被引：38

作者：

Huff, AK ^{[1
]}

Thiemens, MH ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Chem, La Jolla, CA 92093 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 1998年 / 25卷 / 18期

关键词：

D O I：

10.1029/98GL02603

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Simultaneous O-17/O-16 and O-18/O-16 measurements of atmospheric carbon monoxide (CO) and two of its major sources are presented. CO was collected in situ at ground level in La Jolla, CA, Pasadena, CA and White Mountain, CA, altitude 3.8 km. Samples were also taken directly from engine exhaust and during a local wild brushfire. Results indicate that atmospheric carbon monoxide has a significant mass independent component, which increases as carbon monoxide concentrations decrease. The origin of the observed mass independent fractionation is discussed. CO samples from engine exhaust and brushfires are clearly mass dependent, but with a wide variation in O-18 values from different engines.

引用

页码：3509 / 3512

页数：4

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