西北太平洋热带气旋路径及其与海温的关系  

THE TROPICAL CYCLONE TRACKS IN THE WESTERN NORTH PACIFIC AND THEIR RELATIONSHIP WITH OCEAN TEMPERATURE

作　　者：袁俊鹏[1] 江静[1] 

机构地区：[1]南京大学大气科学学院,江苏南京210093

出　　处：《热带气象学报》2009年第B12期69-78,共10页Journal of Tropical Meteorology

基　　金：国家重点基础研究发展项目(2006CB403600);国家自然科学基金(40775043);教育部博士点基金(200802840022)共同资助

摘　　要：利用中国气象局发布的1949—2007年共59年的热带气旋年鉴资料,对西北太平洋热带气旋路径进行分析,合并归纳得到热带气旋主要的三种路径,分别为西行、西北行和转向路径,研究发现三种路径主要是8年以下的年际变化。西行路径的热带气旋与海温的关系不明显,西北路径的热带气旋和转向路径热带气旋与局地海温的变化有相反的相关关系。当西北太平洋局地海洋暖的时候有利于西北路径热带气旋发生,局地海温冷时热带气旋多转向,且局地海温在热带气旋发生前半年左右就开始有持续的影响,这种影响不仅仅存在于海洋表层,整个温跃层以上次表层海温的热状态对热带气旋路径均有显著关系。这可能是由于西北太平洋海温持续异常对其上空的大气环流产生影响,进而影响热带气旋路径。通过研究还发现不同路径热带气旋对海洋的降温作用有显著差异。Using tropical cyclone （TC） data Administration, the tropical cyclone tracks in for 1949--2007 provided by China Meteorological the western North Pacific （WNP） are analyzed. The relationships between local SST and TC tracks are revealed. There are mainly three TC tracks： westward, northwestward and recurvature separately. The interannual variation is important in all three tracks. The relationship of SST with TC tracks is dissimilar in interannual scale. There is no significant correlation between west track and SST in WNP, while northwest and recurvature tracks have significant relationships with local SST. When WNP is warm, most TCs move northwest, while TCs appear recurving in a cool WNP. These significant correlations appear about half year before TC occurring, and they also appear in the subsurface layer in WNP. A persistent abnormality in WNP temperature will have an impact on the atmospheric circulation, which affects the TC motion. It is also found that the cyclone-induced cooling is different in different TC track.

关 键 词：气候学 热带气旋路径 相关分析 海温 

分 类 号：P461.1[天文地球—大气科学及气象学]