期刊
INTERNATIONAL JOURNAL OF CLIMATOLOGY
卷 30, 期 6, 页码 827-843出版社
WILEY-BLACKWELL
DOI: 10.1002/joc.1943
关键词
South China Sea tropical cyclones; interannual variability; interdecadal variability
资金
- City University of Hong Kong
This study attempts to identify the factors affecting annual tropical cyclone (TC) activity in the South China Sea (SCS) using data during the period 1965-2005. The results indicate that the total number of TCs and number of TCs entering the SCS from the Western North Pacific are below normal in El Nino events but above normal during La Nina events. However, for TCs formed inside the SCS, the difference in numbers between the two phases of the El Nino-Southern Oscillation (ENSO) is not as obvious. In addition, the positive phase of the Pacific Decadal Oscillation (PDO) generally favours less TCs in all categories, while the negative PDO phase favours more. These results may be explained by the fact that the ENSO and the PDO affect TC behaviour through altering the conditions in the WNP to be favourable or unfavourable for TC genesis and movement into the SCS. Copyright (C) 2009 Royal Meteorological Society
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