上层海洋热力异常对西北太平洋热带气旋气候特征的影响  

The Relationship between Upper Oceanic Heat Anomaly and Tropical Cyclone Activity in the Western North Pacific

作　　者：储惠芸[1] 王元[1] 伍荣生[1] 

机构地区：[1]南京大学中尺度灾害性天气教育部重点实验室大气科学系,南京210093

出　　处：《南京大学学报（自然科学版）》2007年第6期581-588,共8页Journal of Nanjing University（Natural Science）

基　　金：国家自然科学基金(40333025);上海台风研究基金(2006STB04)

摘　　要：重点分析了1970—2003年期间西北太平洋的热带气旋活动特征与海洋表面温度、上层海洋的热力异常变化以及对流层低层的大尺度环流特征之间的关系.分析结果发现在西北太平洋海域,热带气旋活动趋势与上层海洋热力异常变化(上层海洋热含量)以及对流层低层的西风异常之间有着显著的相关关系,而与海洋表面温度无显著关系.并在此基础上探讨了这种关系存在的物理机制.In this paper, the relationship among the tropical cyclone activity and the sea surface temperature（SST）, and among the upper oceanic heat storage anomaly and the tropical large-scale anomalous circulation is analyzed, which is over the west-north Pacific Ocean during a 34-yr period from 1970 to 2003. The results have shown that the trend of upper oceanic heat storage（0 - 400 m） and the westerly anomalies are well consistent with those on the tropical activity. This statistics assessment as well as the physical mechanism analysis suggests that for the oceanatmosphere correlation, the oceanic heat storage is a much better indicative variable than SST, and that is particular true when the cyclone activities and its annual variation are in major concern.

关 键 词：热带气旋 上层海洋热含量 西风异常 海表温度 

分 类 号：P444[天文地球—大气科学及气象学]