Satellite observations of temporary and irreversible denitrification

被引：21

作者：

Dessler, AE ^{[1
]}

Wu, J

Santee, ML

Schoeberl, MR

机构：

[1] Univ Maryland, Dept Meteorol, College Pk, MD 20742 USA

[2] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA

[3] NASA, Jet Prop Lab, Pasadena, CA 91109 USA

[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 1999年 / 104卷 / D11期

关键词：

D O I：

10.1029/1999JD900133

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

We have investigated temporary and irreversible denitrification in the polar regions. We find that the formation of type I polar stratospheric clouds (PSCs) in both hemispheres is best described by a supercooled ternary solution model. Considering the uncertainties in the analysis, our results are also consistent with a nitric acid dihydrate composition for type I PSCs, but not a nitric acid trihydrate composition. In the Northern Hemisphere, we observe that an upper limit of 17% of HNO3 is irreversibly lost each time the temperature of an air mass drops below similar to 190 K. It seems likely that in order to remove a significant fraction of the HNO3 from an air mass in the Northern Hemisphere, one must expose it to low temperatures multiple times.

引用

页码：13993 / 14002

页数：10

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