Anthropogenic forcing on the Hadley circulation in CMIP5 simulations
Anthropogenic forcing on the Hadley circulation in CMIP5 simulations
复制标题
CMIP5 模拟中哈德来环流的人为强迫
DOI：
10.1007/s00382-015-2772-1
复制
发表时间：
2016-05
期刊：
影响因子：
4.6
通讯作者：
Liu Jiping
中科院分区：
文献类型：
--
作者：
Tao Lijun;Hu Yongyun;Liu Jiping
Hadley环流的向极扩展是近年来气候变化研究中的一个重要课题，其中一个至关重要的问题是它与人为强迫的关系。利用耦合模式相互比较投影第5阶段（CMIP 5）的模拟，我们研究了人为强迫对Hadley环流宽度和强度的影响。 结果发现，显着的向极扩展的Hadley环流可以重现在CMIP5的历史所有强迫模拟，虽然幅度的趋势是远远弱于观测。对单个强迫的模拟表明，在三种主要的人为强迫中，温室气体的增加和平流层臭氧的消耗都导致Hadley环流向极扩展，而人为气溶胶对Hadley环流没有显著的影响。温室气体的增加会导致南北半球向极方向的显著扩张，其中北方环流在北方秋季的扩张幅度最大。平流层臭氧消耗迫使南方春季和夏季的南部环流以及北方春季的北部环流的哈德利环流显着向极地扩展。在CMIP 5对21世纪世纪的预测模拟中，Hadley环流向极扩展的幅度随着温室气体强迫的增加而增加。另一方面，臭氧恢复竞争增加温室气体在确定的哈德利环流的宽度，特别是在南方夏季。在历史和预测模拟中，哈德利环流的强度在两个半球的冬季都显着减弱。
Poleward expansion of the Hadley circulation has been an important topic in climate change studies in the past few years, and one of the critically important issues is how it is related to anthropogenic forcings. Using simulations from the coupled model intercomparison projection phase 5 (CMIP5), we study influences of anthropogenic forcings on the width and strength of the Hadley circulation. It is found that significant poleward expansion of the Hadley circulation can be reproduced in CMIP5 historical all-forcing simulations although the magnitude of trends is much weaker than observations. Simulations with individual forcings demonstrate that among three major types of anthropogenic forcings, increasing greenhouse gases (GHGs) and stratospheric ozone depletion all cause poleward expansion of the Hadley circulation, whereas anthropogenic aerosols do not have significant influences on the Hadley circulation. Increasing GHGs cause significant poleward expansion in both hemispheres, with the largest widening of the northern cell in boreal autumn. Stratospheric ozone depletion forces significant poleward expansion of the Hadley circulation for the southern cell in austral spring and summer and for the northern cell in boreal spring. In CMIP5 projection simulations for the twenty-first century, the magnitude of poleward expansion of the Hadley circulation increases with GHG forcing. On the other hand, ozone recovery competes with increasing GHGs in determining the width of the Hadley circulation, especially in austral summer. In both historical and projection simulations, the strength of the Hadley circulation shows significant weakening in winter in both hemispheres.
登录
查看更多内容
影响因子：
4.9
作者：
S. Davis;K. Rosenlof
通讯作者：
S. Davis;K. Rosenlof
影响因子：
5.2
作者：
Hammes, Karen;Schmidt, Michael W. I.;Ding, Luyi
通讯作者：
Ding, Luyi
影响因子：
5.2
作者：
Chen, Gang;Held, Isaac M.
通讯作者：
Held, Isaac M.
DOI：
10.1142/9789812838100_0006
发表时间：
2010-05
期刊：
--
影响因子：
--
作者：
Yongyun Hu;Chen Zhou
通讯作者：
Yongyun Hu;Chen Zhou
影响因子：
5.2
作者：
Archer, Cristina L.;Caldeira, Ken
通讯作者：
Caldeira, Ken