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A Review of Recent Advances in Research on Asian Monsoon in China

HE Jinhai~1 JU Jianhua~* WEN Zhiping~(?) LU Junmei~4 JIN Qihua~1 1 College of Atmospheric Sciences,Nanjing University of Information Science & Technology,Nanjing 210044 2 China Meteorological Administration Training Centre,Beijing 100081 3 Department of Atmospheric Science,Sun Yat-Sen University,Guangzhou 510275 4 Chinese Academy of Meteorological Sciences,Beijing 100081  
This paper reviews briefly advances in recent research on monsoon by Chinese scholars,including pri- marily:(1)the establishment of various monsoon indices.In particular,the standardized dynamic seasonal variability index of the monsoon can delimit the geographical distribution of global monsoon systems and determine quantitatively the date of abrupt change in circulation.(2)The provision of three driving forces for the generation of monsoon.(3)The revelation of the heating-pump action of the Tibetan Plateau,which strengthens southerlies in the southern and southeastern periphery of the Plateau and results in a strong rainfall center from the northern Bay of Bengal(BOB)to the Plateau itself.(4)Clarification of the initial onset of the Asian Summer Monsoon(ASM)in the BOB east of 90°E,Indochina Peninsula(ICP)and the South China Sea,of which the rapid northward progression of tropical convection in the Sumatra and the rapid westward movement of the South Asia High to the Indochina Peninsula are the earliest signs.(5)The provision of an integrated mechanism for the onset of the East Asian Summer Monsoon(EASM),which emphasizes the integrated impact of sensible heat over Indian Peninsula,the warm advection of the Tibetan Plateau and the sensible heat and latent heat over the Indochina Peninsula on the one hand,and the seasonal phase-lock effect of the northward propagation of low frequency oscillation on the other.(6)The revelation of the"planetary-scale moisture transport large-value band"from the Southern Hemisphere through to the Asian monsoon region and into the North Pacific,which is converged by several large-scale moisture trans- port belts in the Asian-Australian monsoon regions and whose variation influences directly the temporal and spatial distribution of summer rainfall in China.(7)Presenting the features of the seasonal advance of the EASM,the propagation of intraseasonal oscillation,and their relationship with rainfall in China;indicating that the intraseasonal oscillation of the EASM propagates in the form of a wave-train along the coast and behaves as monsoon surge propagating northward.(8)Describing the interannual and interdecadal varia- tion of Asian monsoon,revealing the factors affecting it,and possible mechanisms of the variation of Asian monsoon.An elementary outlook on the existing problems and future direction of monsoon research is also provided.
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