摘要
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 Nina,eastern Pacific warming decaying to a neutral El Nino-Southern Oscillation phase,and a central Pacific warming decaying year.Results show that,for the type of eastern Pacific warming decaying to La Nina,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 Nino to a neutral year.During the decaying phase of central Pacific El Nino 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 Nifia, eastern Pacific warming decaying to a neutral E1 Nifio-Southern Oscilla- tion phase, and a central Pacific warming decaying year. Results show that, for the type of eastern Pacific wanning decaying to La Nifia, 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 E1 Nifio to a neutral year. During the decaying phase of central Pacific E1 Nifio events, more TCs tend to make landfall over southern China, Indochina Peninsula and the Philippines. The anomalies of atmospheric circu- lation 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.
基金
supported by the National Basic Research Program of China(2013CB956203)
the R&D Special Fundfor Public Welfare Industry(Meteorology)(GYHY201306025)
the National Natural Science Foundation of China(41175090)
the Jiangsu Collaborative Innovation Center for Climate Change
关键词
登陆热带气旋
东太平洋
衰减
变暖
类型
东亚
陆地
海温异常
Tropical cyclone
Landfall
East Asia
Sea surface temperature anomalies
E1 Nino decaying phase
