太平洋海气耦合经向模态和西北太平洋热带气旋生成频数的关系  

THE PACIFIC MERIDIONAL MODE OF COUPLED OCEAN-ATMOSPHERE AND THE CONNECTION WITH FREQUENCY OF TROPICAL CYCLONES ACTIVITY OVER THE WESTERN NORTH PACIFIC

作　　者：黄勇[1] 李崇银[1,2] 王颖[3] 

机构地区：[1]解放军理工大学气象学院,江苏南京211101 [2]中国科学院大气物理研究所,北京100029 [3]总参气象水文局,北京100081

出　　处：《热带气象学报》2009年第2期169-174,共6页Journal of Tropical Meteorology

基　　金：国家自然科学基金项目(40675051);国家973项目(2006CB403600)共同资助

摘　　要：分析了太平洋经向模(Pacific Meridional Mode,PMM)和西北太平洋热带气旋生成频数(Tropical Cyclones Number,TCN)变化的关系。PMM是太平洋热带海气耦合系统内在固有变化的动力模态,它与西北太平洋热带气旋的活动在年际变化上存在较强的相关(1960—2003年期间年际变化的相关系数为0.63)。分析表明这种关系的产生是由于与PMM有关的许多气候条件都对热带气旋的活动产生影响。而PMM和热带气旋活动之间的关系将有助于我们对热带气旋与大尺度气候变化之间关系的讨论,为构建此问题的非单纯热力或动力框架提供了新思路。The Pacific Meridional Mode（PMM） and the connection with frequency of tropical cyclones activity over the Western North Pacific are analyzed. The PMM emerges as intrinsic and true dynamical modes of the tropical coupled ocean-atmosphere system variability, and is strongly related to tropical cyclones activity on interannual time scales（interannual variability correlative coefficient is 0.63 between 1960 and 2003）. Analyses show that the connection arises due to the PMM＇s relationship with a number of local climatic conditions that all cooperate in their influence on tropical cyclones activity. This relationship between the PMM and tropical cyclones activity helps us understand how climate variations relate to tropical cyclones activity in the Pacific and offers an improved framework beyond purely thermodynamic or dynamic arguments that relates tropical cyclones to large-scale climate variations.

关 键 词：热带气旋 太平洋经向模 大气环流 

分 类 号：P444[天文地球—大气科学及气象学]