DOI: 10.1007/s00382-015-2854-0
Scopus记录号: 2-s2.0-84944610468
论文题名: Slow and fast annual cycles of the Asian summer monsoon in the NCEP CFSv2
作者: Shin C.-S. ; Huang B.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 2017-01-02 起始页码: 529
结束页码: 553
语种: 英语
英文关键词: Air–sea interaction
; Asian summer monsoon
; CFSv2
; Slow and fast annual cycles
英文摘要: The climatological Asian summer monsoon (ASM) is decomposed into the slow and fast annual cycles (SAC and FAC). The FAC represents the abrupt onset and breaks phase-locked to the ASM seasonal progression. This study evaluates how well the NCEP Climate Forecast System version 2 (CFSv2) simulates the SAC and FAC over the Indian and East Asia monsoon regions (IMR and EAMR). The simulated SACs are in good agreement with observations in both regions. The FAC also represents the northward propagation in both observations and CFSv2. It is further demonstrated that the FAC is associated with a thermodynamic air–sea interaction. In particular, the different roles played by the wind-evaporation-SST (WES) feedback may account for the faster propagation in the IMR than the EAMR. However, compared with observations, the simulated FAC shows earlier monsoon onset and long-lasting stronger dry and wet phases in the IMR but delayed monsoon onset with weaker and less organized FAC in the EAMR. These reversed behaviors may originate from a warm (cold) SST bias in the IMR (EAMR) in boreal spring and enhanced by an overly sensitive surface evaporation to wind changes in the CFSv2. As a result, the warm spring SST bias in the IMR initiates a strong WES feedback and changes of solar insolation during boreal summer, which leads to a cold SST bias in early fall. On the other hand, the cold spring SST bias in the EAMR accounts for a weaker air–sea coupling, which in turn results in a warm SST bias after the withdrawal of the monsoon. © 2015, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53636
Appears in Collections: 过去全球变化的重建
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作者单位: Center for Ocean-Land-Atmosphere Studies, George Mason University, 4400 University Drive, Fairfax, VA, United States; Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, VA, United States
Recommended Citation:
Shin C.-S.,Huang B.. Slow and fast annual cycles of the Asian summer monsoon in the NCEP CFSv2[J]. Climate Dynamics,2016-01-01,47(2017-01-02)