Strengthened African Summer Monsoon in the Mid-Piacenzian  

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

机构地区：[1]Climate Change Research Center, Chinese Academy of Sciences [2]Department of Atmospheric Science, School of Environmental Studies, China University of Geosciences [3]Nansen–Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences [4]Bjerknes Centre for Climate Research, Uni Research [5]School of Earth and Space Sciences, University of Science and Technology of China [6]Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, College of Atmospheric Sciences,Chengdu University of Information Technology

出　　处：《Advances in Atmospheric Sciences》2016年第9期1061-1070,共10页大气科学进展（英文版）

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)

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.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.

关 键 词：PlioMIE mid-Piacenzian African summer monsoon vegetation change 

分 类 号：P425.42[天文地球—大气科学及气象学] S718.45[农业科学—林学]