南海热带气旋引起的海表面温度变化特征分析  

The variation features of SST induced by tropical cyclones over SCS

作　　者：蒋小平 钟中[2] 赵思楠 姜洪峰 

机构地区：[1]解放军75200部队司令部测绘气象室 [2]解放军理工大学气象学院 [3]解放军总参气象水文中心

出　　处：《气象科学》2008年第6期614-618,共5页Journal of the Meteorological Sciences

基　　金：国家自然科学基金项目(40675065)

摘　　要：本文利用热带降雨测量卫星微波成像的微波遥感资料反演的高分辨率海表面温度(SST)资料,分别分析了南海4种典型热带气旋所引起的SST变化特征。结果表明,由于路径、移速和海面热力状况等方面的差异,这4种热带气旋在南海造成的海面降温具有不同的特征。热带气旋Imbudo(0308)属快速移动的西行路径型,在其路径的右侧造成了较大的降温区,降温中心离热带气旋中心约120 km;热带气旋Chanchu(0601)为西行北翘型,在其路径两侧分别形成两个降温中心;打转型热带气旋很容易在其打转处形成降温中心,热带气旋Kai-Tak(0004)在海面造成了9.75℃的降温,在其打转处存在一个持续时间很长的冷涡;热带气旋Vongfong(0214)由于其左侧是南海西部夏季冷涡,混合层深度较浅,其作用使得冷涡加强,并在其路径的左侧造成大面积降温区。The variation features of SST of four typical tropical cyclones over the SCS have been analysed in terms of retrieved data from TRMM/TMI with high resolution. The results show that the cooling feature of SST is different significantly for different tropical cyclone, due to the distinction on track, moving speed and thermal state of sea surface. Imbudo （0308） moves swiftly westward, and the large cooling area is over the right to its track, with a cooling center about 120 km away from the center of Imbudo. Chanehu moves westward with north turning, and two cooling centers are at the opposite side of its track, respectively. For the tropical cyclone looping over the SCS, the cooling center is in the sea area where the tropical cyclone takes a loop form , an abnormal cooling at -9.75 ℃ occurred for Kai-Tak （0004）. Such a large scale cooling has never been reported up to now, and long-lived cold eddy persists in the rotation center of Kai-Tak disclosed by the sea surface height anomaly from satellite altimeter data. It is also found that the cold eddy over the west of SCS intensified and a large cooling area appeared because a shallow cold eddy is on the right of the track of Vongfong （0214）.

关 键 词：海表面温度 热带气旋 冷涡 

分 类 号：P444[天文地球—大气科学及气象学]