RESEARCH ON THE INTERANNUAL AND INTERDECADAL VARIABILITIES OF THE MONSOON TROUGH AND THEIR IMPACTS ON TROPICAL CYCLONE GENESIS OVER THE WESTERN NORTH PACIFIC OCEAN

作者：黃榮輝,皇甫靜亮,武亮,馮濤,陳光華

摘要：In this paper,we mainly summarize and review the progresses in recent climatological studies (by CMSR, IAP/CAS and some associated domestic and international institutions)on the interarmual and interdecadal variabilities of monsoon troughs and their impacts on tropical cyclones and typhoons (TCs)geneses over the western North Pacific Ocean.The climatological characteristics of monsoon troughs and four types of circulation patterns favorable to TCs genesis over the western North Pacific Ocean in summer and autumn are given in this paper.It is also shown in this paper that the monsoon trough over the western North Pacific Ocean has obvious interarmual and interdecadal variabilities.Especially,it is revealed in this paper that the interannual and interdecadal variabilities of the monsoon trough over the western North Pacific Ocean influence the TCs genesis not only through the impact on distributions of the vorticity in the lower troposphere and the divergence in the upper troposphere,the water vapor in the mid-and lower troposphere and the vertical shear of wind fields between the upper and lower troposphere over the western North Pacific Ocean,but also through the dynamical effects of the transition between convectively coupled tropical waves and providing disturbance energy.Besides,some climatological problems associated with TCs activity over the western North Pacific Ocean that need to be studied further are also pointed out in this paper.

發文機構：Center for Monsoon System Research （CMSR） State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics （LASG） College of Earth Sciences CMA-NJU Joint Laboratory for Climate Prediction Studies

關鍵詞：MONSOONTROUGHINTERANNUALVARIABILITYINTERDECADALVARIABILITYtropicalcyclonetyphoon

分類號： P433[天文地球—大氣科學及氣象學]