Simulation of solar‐cycle modulation of the Southern Annular Mode using a chemistry‐climate model
Simulation of solar‐cycle modulation of the Southern Annular Mode using a chemistry‐climate model
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DOI：
10.1029/2005gl025095
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发表时间：
2006-03
影响因子：
5.2
通讯作者：
Y. Kuroda;K. Shibata
中科院分区：
文献类型：
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作者：
Y. Kuroda;K. Shibata
利用一个耦合的化学-气候模式，我们模拟了与11年太阳周期相关的紫外线辐射（UV）变化引起的南环模（SAM）的结构调制。在一个增强的紫外线运行中，冬末的地对空信号延伸到平流层上层，并持续到次年秋天。在一个减弱的紫外线周期中，该信号主要局限于对流层，并在随后的夏季迅速消失。紫外线持续增强与极地平流层下层臭氧异常的形成有关，这是由冬末布鲁尔-多布森环流的调制造成的。
Using a coupled chemistry‐climate model, we simulated the structural modulation of the Southern Annular Mode (SAM) caused by the change in ultraviolet radiation (UV) associated with the 11‐year solar cycle. In an enhanced UV run, the SAM signal in late winter extended to the upper stratosphere and persisted until the following autumn. In a reduced UV run, the signal was mostly confined to the troposphere and disappeared very quickly during the following summer. This greater persistence in an enhanced UV run is connected to the formation of an ozone anomaly in the polar lower stratosphere, produced by the modulation of the Brewer‐Dobson circulation in late winter.