Interannual variation in the tropical cyclone formation over the western North Pacific

Tsing Chang Chen*, Shu Ping Weng, Nubuo Yamazaki, Susan Kiehne

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

189 引文 斯高帕斯(Scopus)

摘要

The interannual variation in tropical cyclone genesis frequency over the western North Pacific was examined for the active tropical cyclone (including summer and fall) during 1979-94. An emphasis was put on the possible effect of the interannual variation of atmospheric circulation and monsoon trough on tropical cyclone occurrence. The major findings of this study are the following. 1) A distinct increase (decrease) of tropical cyclone genesis frequency occurs north of the climatological location of the monsoon trough in the Philippine Sea during summers (June-August) with anomalous cold (warm) sea surface temperature (SST) over the NINO3 region. The interannual variation of tropical cyclone genesis in this region results from the appearance of an anomalous cyclonic (anticyclonic) cell situated in a summer teleconnection wave train emanating from the western tropical Pacific and progressing along the rim of the North Pacific. In addition to the north-south interannual variation, there is also a longitudinal interannual variation in the summer tropical cyclone genesis frequency over this region. The contrast of tropical cyclone genesis between the regions west and east of 150°E is reduced (enhanced) when the monsoon trough extends (retreats) eastward (westward) across this longitude during warm (cold) summers. 2) For fall (September-November), there is no clear relationship between the north-south interannual variation in the tropical cyclone genesis over the western North Pacific and SST (NINO3). However, there is a perceptible tendency of the longitudinal interannual variation in tropical cyclone genesis frequency to follow the eastward extension/westward retreat of the monsoon trough in a way such as it does during the summer season.

原文英語
頁(從 - 到)1080-1090
頁數11
期刊Monthly Weather Review
126
發行號4
DOIs
出版狀態已發佈 - 1998 四月
對外發佈

ASJC Scopus subject areas

  • 大氣科學

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