Freezing of polar stratospheric clouds in orographically induced strong warming events

被引：57

作者：

Tsias, A ^{[1
]}

Prenni, AJ ^{[1
]}

Carslaw, KS ^{[1
]}

Onasch, TP ^{[1
]}

Luo, BP ^{[1
]}

Tolbert, MA ^{[1
]}

Peter, T ^{[1
]}

机构：

[1] UNIV COLORADO,BOULDER,CO 80309

来源：

GEOPHYSICAL RESEARCH LETTERS | 1997年 / 24卷 / 18期

关键词：

D O I：

10.1029/97GL02181

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Results from laboratory experiments and microphysical modeling are presented that suggest a potential freezing nucleation mechanism for polar stratospheric cloud (PSC) particles above the water ice frost point (T-ice). The mechanism requires very high HNO3 concentrations of about 58 wt% in the droplets, and leads to the freezing of nitric acid dihydrate (NAD) in a highly selective manner in the smallest droplets of an ensemble. In the stratosphere such liquid compositions are predicted to occur in aerosol droplets which are warmed adiabatically with rates of about +150 K/h from below 190 K to 194 K. Such rapid temperature changes have been observed in mountain leewaves that occur frequently in the stratosphere, clearly demonstrating the need for a stratospheric gravity wave climatology.

引用

页码：2303 / 2306

页数：4

共 23 条

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[2]

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