斜压大气中双涡自组织与台风形成的初步研究  

PRELIMINARY STUDY ON THE RELATIONSHIP BETWEEN SELF-ORGANIZATION OF DOUBLE VORTICES AND TYPHOON FORMATION IN BAROCLINIC ATMOSPHERE

作　　者：滕代高 罗哲贤[2] 潘劲松 

机构地区：[1]浙江省气象台,浙江杭州310017 [2]南京信息工程大学遥感学院,江苏南京210044

出　　处：《热带气象学报》2009年第4期394-400,共7页Journal of Tropical Meteorology

基　　金：国家自然科学基金项目(40333028);浙江省科技厅重大项目(2007C13G1610002)共同资助

摘　　要：从数值研究和个例分析两个方面讨论了斜压大气中双涡自组织与台风形成的关系。首先,利用PSU/NCAR第五代数值天气预报模式(MM5),设计了6个弱环境流场下的理想试验,研究斜压大气中双涡自组织对台风形成的影响,结果表明:斜压大气中双涡自组织存在一个临界距离dc,其值在380 km左右。当双涡间距d≤dc时,双涡可以自组织形成台风环流,当d>dc时,自组织现象不能发生。其次,选取一个对我国有重要影响典型台风个例,分析双涡自组织对其形成的影响,结果表明双涡自组织过程是对我国有重要影响台风形成的典型方式之一。The relationship between the self-organization of double vortices （SODVs） and the formation of typhoons is discussed based on numerical simulation and case study. Firstly, the effect of SODVs on the formation of typhoons is studied with six experiments based on PSU/NCAR MM5 model. The results show that there is a critical distance dc for SODVs in baroclinic atmosphere. The two separated vortices can self-organize into a typhoon vortex when the distance between them is smaller than or equal to do but they cannot if it is larger than dc. Next, a typical case of typhoon that has serious consequence in China, Haitang （2005）, is selected to verify the above-mentioned conclusion of the experiment, whose result indicates that the SODVs is one of the important and typical ways for typhoons significantly affecting China to form.

关 键 词：天气动力学 台风形成 数值研究 斜压大气 双涡自组织 

分 类 号：P444[天文地球—大气科学及气象学]