Changes in the strength of the Brewer-Dobson circulation in a simple AGCM

被引：66
|
作者：
Eichelberger, SJ [1 ]
Hartmann, DL [1 ]
机构：
[1] Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2005年 / 32卷 / 15期
关键词：
D O I：
10.1029/2005GL022924
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
A simple general circulation model is used to explore the response of the Brewer-Dobson circulation to warming of the tropical troposphere typically associated with greenhouse gas warming in climate models. The strength of the modeled Brewer-Dobson circulation increases in response to tropospheric tropical warming. The tropical warming causes the midlatitude baroclinicity to increase, which leads to an increase in the wave activity at synoptic and planetary scales. Increased wave propagation from the troposphere causes stronger EP flux convergence in the stratosphere. The EP flux convergence drives a stronger Brewer-Dobson circulation via downward control arguments. These results are compared to other recent GCM studies.
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页码：1 / 5
页数：5
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