Mass-independent oxygen isotope fractionation in atmospheric CO as a result of the reaction CO+OH

被引：130

作者：

Röckmann, T ^{[1
]}

Brenninkmeijer, CAM ^{[1
]}

Saueressig, G ^{[1
]}

Bergamaschi, P ^{[1
]}

Crowley, JN ^{[1
]}

Fischer, H ^{[1
]}

Crutzen, PJ ^{[1
]}

机构：

[1] Max Planck Inst Chem, Div Atmospher Chem, D-55020 Mainz, Germany

来源：

SCIENCE | 1998年 / 281卷 / 5376期

关键词：

D O I：

10.1126/science.281.5376.544

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Atmospheric carbon monoxide (CO) exhibits mass-independent fractionation in the oxygen isotopes. An O-17 excess up to 7.5 per mil was observed in summer at high northern latitudes. The major source of this puzzling fractionation in this important trace gas is its dominant atmospheric removal reaction, CO + OH --> CO2 + H, in which the surviving CO gains excess O-17. The occurrence of mass-independent fractionation in the reaction of CO with OH raises fundamental questions about kinetic processes. At the same time the effect is a useful marker for the degree to which CO in the atmosphere has been reacting with OH.

引用

页码：544 / 546

页数：3

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