ANALYSIS OF THE WESTWARD EXTENSION OF WESTERN PACIFIC SUBTROPICAL HIGH DURING A HEAVY RAIN PERIOD OVER SOUTHERN CHINA IN JUNE 2005-中国期刊网

摘要 TheNCEP/NCARIIdailymeanreanalysisdataandobservedprecipitationdataareemployedtoinvestigatethewestwardextensionofthewesternPacificsubtropicalhigh(WPSH)duringtheheavyrainperiodoverthesouthernChinainJune2005.Resultsshowthattheremayexistarelationshipbetweentheeast-westshiftoftheWPSHandtheprocessofasouthernChinaheavyrain.TheanalysisindicatesthattheverticalmotionintheWPSHareaismainlycausedbythelatentheatreleaseofmonsoonrainbeltsonitsnorthernandsouthernsides.TheverticalmotioncouldcausetheaccumulationofairmassinthecenterandwestoftheWPSH,whichleadstoitsstrengthening.TheappearanceofthenorthernandsouthernmonsoonrainbeltscouldnotonlyenhancetheWPSHbystrengtheningthedescendingdraft,butalsoexcitethedevelopmentofpositivevorticityandrestricttheWPSH'smovementinthenorth-southdirection.Moreover,theIndianmonsoonrainfalltothewestoftheWPSHmayexcitethedevelopmentofanticyclonicvorticityonitseasternside,whichleadstothewestwardextensionoftheWPSH.

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ANALYSIS OF THE WESTWARD EXTENSION OF WESTERN PACIFIC SUBTROPICAL HIGH DURING A HEAVY RAIN PERIOD OVER SOUTHERN CHINA IN JUNE 2005

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ANALYSIS OF THE WESTWARD EXTENSION OF WESTERN PACIFIC SUBTROPICAL HIGH DURING A HEAVY RAIN PERIOD OVER SOUTHERN CHINA IN JUNE 2005

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