The impact of stratospheric ozone recovery on the Southern Hemisphere westerly jet
The impact of stratospheric ozone recovery on the Southern Hemisphere westerly jet
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DOI：
10.1126/science.1155939
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发表时间：
2008-06-13
期刊：
影响因子：
56.9
通讯作者：
Shibata, K.
中科院分区：
文献类型：
--
作者：
Son, S. -W.;Polvani, L. M.;Shibata, K.
在过去的几十年里，观测到南半球对流层西风在地面风最大值的极地一侧加速。这是由于温室气体增加和平流层臭氧减少的综合人为影响造成的，政府间气候变化专门委员会/第四次评估报告（IPCC/AR4）模型预测这种影响将持续下去。在本文中，检验了化学-气候模型验证 (CCMVal) 模型的预测：与 AR4 模型不同，CCMVal 模型具有完全交互式的平流层化学。由于预计臭氧空洞将在21世纪上半叶消失，CCMVal模型预测南半球夏季对流层西风带将减速，向极地一侧，这与大多数IPCC/AR4模型的预测相反。
In the past several decades, the tropospheric westerly winds in the Southern Hemisphere have been observed to accelerate on the poleward side of the surface wind maximum. This has been attributed to the combined anthropogenic effects of increasing greenhouse gases and decreasing stratospheric ozone and is predicted to continue by the Intergovernmental Panel on Climate Change/Fourth Assessment Report (IPCC/AR4) models. In this paper, the predictions of the Chemistry-Climate Model Validation (CCMVal) models are examined: Unlike the AR4 models, the CCMVal models have a fully interactive stratospheric chemistry. Owing to the expected disappearance of the ozone hole in the first half of the 21st century, the CCMVal models predict that the tropospheric westerlies in Southern Hemisphere summer will be decelerated, on the poleward side, in contrast with the prediction of most IPCC/AR4 models.