Short-lived bromine compounds in the lower stratosphere; impact of climate change on ozone

被引:23
作者
Dessens, Olivier [1 ]
Zeng, Guang [1 ,2 ,3 ]
Warwick, Nicola [1 ,2 ]
Pyle, John [1 ,2 ]
机构
[1] Univ Cambridge, Ctr Atmospher Sci, Cambridge CB2 1TN, England
[2] Univ Cambridge, NCAS Climate Composit, Cambridge CB2 1TN, England
[3] Natl Inst Water & Atmospher Res, Lauder, New Zealand
来源
ATMOSPHERIC SCIENCE LETTERS | 2009年 / 10卷 / 03期
基金
英国自然环境研究理事会;
关键词
short-lived bromocarbons; climate change; stratospheric ozone; TROPOSPHERIC OZONE; MODEL;
D O I
10.1002/asl.236
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
We consider how future changes in the circulation of the troposphere might change the delivery of short-lived brominated species to the stratosphere and study the impact of this change on stratospheric ozone. Changes in stratospheric bromine are potentially significant, amounting, under an extreme scenario of all short-lived species having a tropical source, to an increase of perhaps 10% above current levels. This must be set against the slow removal of anthropogenic halogens from the stratosphere. These changes lead to modest, but non-negligible decreases in ozone in the lower stratosphere, reaching about 8% at the tropopause, where changes in ozone have important climate consequences. Copyright (C) 2009 Royal Meteorological Society
引用
收藏
页码:201 / 206
页数:6
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