Strengthened African Summer Monsoon in the Mid-Piacenzian

作     者：Ran ZHANG Zhongshi ZHANG Dabang JIANG Qing YAN Xin ZHOU Zhigang CHENG 

作者机构：Climate Change Research Center Chinese Academy of Sciences Department of Atmospheric Science School of Environmental Studies China University of Geosciences Nansen–Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Bjerknes Centre for Climate Research Uni Research School of Earth and Space Sciences University of Science and Technology of China Plateau Atmosphere and Environment Key Laboratory of Sichuan Province College of Atmospheric SciencesChengdu University of Information Technology 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2016年第33卷第9期

页      面：1061-1070页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 0713[理学-生态学] 

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB03020602) the National Natural Science Foundation of China (Grant Nos. 41175072, 41305073, 41402158 and 41472160) 

主　　题：PlioMIE mid-Piacenzian African summer monsoon vegetation change 

摘      要：Using model results from the first phase of the Pliocene Model Intercomparison Project （PlioMIP） and four experiments with CAM4, the intensified African summer monsoon （ASM） in the mid-Piacenzian and corresponding mechanisms are analyzed. The results from PlioMIP show that the ASM intensified and summer precipitation increased in North Africa during the mid-Piacenzian, which can be explained by the increased net energy in the atmospheric column above North Africa. Further experiments with CAM4 indicated that the combined changes in the mid-Piacenzian of atmospheric CO2 concentration and SST, as well as the vegetation change, could have substantially increased the net energy in the atmospheric column over North Africa and further intensified the ASM. The experiments also demonstrated that topography change had a weak effect. Overall, the combined changes of atmospheric CO2 concentration and SST were the most important factor that brought about the intensified ASM in the mid-Piacenzian.