Features of tropical cyclone landfalls over East Asia corresponding to three types of Pacific warmin

来源 :Chinese Science Bulletin | 被引量 : 0次 | 上传用户:aglusaiy
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This study examines the tropical cyclone(TC)landfall activities over the East Asia in three types of decaying phase of warm sea surface temperature anomalies(SSTAs)over the equatorial central-eastern Pacific:eastern Pacific warming decaying to La Nina,eastern Pacific warming decaying to a neutral El Nino-Southern Oscillation phase,and a central Pacific warming decaying year.Results show that,for the type of eastern Pacific warming decaying to La Nina,more TCs make landfall over Hainan Island and Beibu Gulf,whereas fewer TCs reach eastern China coast.In particular,the number of landfalling TCs remarkably decreases in the decaying phase of eastern Pacific El Nino to a neutral year.During the decaying phase of central Pacific El Nino events,more TCs tend to make landfall over southern China,Indochina Peninsula and the Philippines.The anomalies of atmospheric circulation and environmental conditions induced by the SSTAs over the tropical Pacific in the different decaying types are responsible for the evident variation in features of TC landfall. This study examines the tropical cyclone (TC) landfall activities over the East Asia in three types of decaying phase of warm sea surface temperature anomalies (SSTAs) over the equatorial central-eastern Pacific: eastern Pacific warming decaying to La Nina, eastern Pacific warming decaying to a neutral El Nino-Southern Oscillation phase, and a central Pacific warming decaying year. Results show that, for the type of eastern Pacific warming decaying to La Nina, more TCs make landfall over Hainan Island and Beibu Gulf , TCs reach the declining phase of the eastern Pacific El Nino to a neutral year. During the decaying phase of central Pacific El Nino events, more TCs tend to make landfall over southern China, Indochina Peninsula and the Philippines. anomalies of atmospheric circulation and environmental conditions induced by the SSTAs over the tropical Pacific in the different decaying typ es are responsible for the evident variation in features of TC landfall.
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