KINETIC ISOTOPIC FRACTIONATION DURING AIR-WATER GAS TRANSFER OF O-2, N-2, CH-4, AND H-2

被引：139

作者：

KNOX, M ^{[1
]}

QUAY, PD ^{[1
]}

WILBUR, D ^{[1
]}

机构：

[1] UNIV WASHINGTON, SCH OCEANOG, SEATTLE, WA 98195 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS | 1992年 / 97卷 / C12期

关键词：

D O I：

10.1029/92JC00949

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

We present experimental results that show that the kinetic isotopic fractionation during gas exchange is 0.9972 +/- 0.0002 for oxygen, 0.9992 +/- 0.0002 for methane, 0.9987 +/- 0.0001 for nitrogen and 0.982 +/- 0.002 for hydrogen, and that the equilibrium fractionation between water and gas phases is 1.037 for hydrogen. We show that the isotopic fractionation during gas transfer for these gases is not equal to the square root of their reduced mass in water, as would be predicted by an extension of the kinetic theory of ideal gases to dissolved gases. The use of isotopes as tracers of biogeochemical gases requires knowledge of the fractionation factor for air-water gas transfer; there have been few direct measurements of these factors.

引用

页码：20335 / 20343

页数：9

共 31 条

[1] PRODUCTION, RESPIRATION, AND THE ISOTOPE GEOCHEMISTRY OF O-2 IN THE UPPER WATER COLUMN [J].