Responses of East Asian summer monsoon to natural and anthropogenic forcings in the 17 latest CMIP5 models
- 作者：Fengfei SongTianjun ZhouYun Qian
- 会议时间：2014-10-01
- 作者单位：Fengfei Song(State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China)Tianjun Zhou(State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;Climate Change Research Center,Chinese Academy of Sciences,Beijing 100029,China)Yun Qian(Atmospheric Sciences and Global Change Division,Pacific Northwest National Laboratory,USA)
- 母体文献：第一届中国大地测量和地球物理学学术大会论文集
- 会议名称：第一届中国大地测量和地球物理学学术大会
- 会议地点：北京
- 主办单位：中国测绘学会
- 语种：chi
摘要
In this study,we examined the responses of East Asian Summer Monsoon (EASM) to natural (solar variability and volcanic aerosols) and anthropogenic (greenhouse gasses and aerosols) forcings simulated in the 17 latest Coupled Model Intercomparison Program phase 5 (CMIP5) models with 105 realizations.The observed weakening trend of low-level EASM circulation during 1958-2001 is partly reproduced under all-forcing runs.A comparison of separate forcing experiments reveals that the aerosol-forcing plays a primary role in driving the weakened low-level monsoon circulation.The preferential cooling over continental East Asia caused by aerosol affects the monsoon circulation through reducing the land-sea thermal contrast and results in higher sea level pressure over northern China.In the upper-level,both natural-forcing and aerosol-forcing contribute to the observed southward shift of East Asian subtropical jet through changing the meridional temperature gradient.