Role of the stratospheric polar freezing belt in denitrification

被引：88

作者：

Tabazadeh, A

Jensen, EJ

Toon, OB

Drdla, K

Schoeberl, MR

机构：

[1] NASA, Ames Res Ctr, Div Earth Sci, Moffett Field, CA 94035 USA

[2] Univ Colorado, Program Atmospher & Ocean Sci, Atmospher & Space Phys Lab, Boulder, CO 80309 USA

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

来源：

SCIENCE | 2001年 / 291卷 / 5513期

关键词：

D O I：

10.1126/science.1057228

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：

Homogeneous freezing of nitric acid hydrate particles can produce a polar freezing belt in either hemisphere that can cause denitrification. Computed denitrification profiles for one Antarctic and two Arctic cold winters are presented. The vertical range over which denitrification occurs is normally quite deep in the Antarctic but limited in the Arctic. A 4 kelvin decrease in the temperature of the Arctic stratosphere due to anthropogenic and/or natural effects can trigger the occurrence of widespread severe denitrification. Ozone loss is amplified in a denitrified stratosphere, so the effects of falling temperatures in promoting denitrification must be considered in assessment studies of ozone recovery trends.

引用

收藏

页码：2591 / 2594

页数：4

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