Statistical characteristics of meso-scale vortex effects on the track of a tropical cyclone  

作　　者：罗哲贤 孙治安 平凡 

机构地区：[1]Remote Sensing College,Nanjing University of Information Science and Technology [2]Wuxi Research Center for Environment Science and Technology [3]Center for Australian Weather and Climate Research [4]Lab of Cloud-Precipitation Physics and Severe Storms (LACS),Institute of Atmospheric Physics,Chinese Academy of Science

出　　处：《Chinese Physics B》2011年第4期581-585,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 40775038,40875031 and 40975036);the Science Foundation of Wuxi Environment Science and Technology Research Center

摘　　要：This paper examines initial meso-scale vortex effects on the motion of a tropical cyclone （TC） in a system where coexisting two components of TC and meso-scale vortices with a barotropic vorticity equation model. The initial mesoscale vortices are generated stochastically by employing Reinaud＇s method. The 62 simulations are performed and analysed in order to understand the statistical characteristics of the effects. Results show that the deflection of the TC track at t = 24 h induced by the initial meso-scale vortices ranges from 2 km to 37 km with the mean value of 13.4 km. A more significant deflection of the TC track can be reduced when several initial meso-scale vortices simultaneously appear in a smaller TC circulation area. It ranges from 22 km to 37 km with the mean value of 28 km, this fact implies that the initial meso-scale vortices-induced deflection may not be neglected sometimes.This paper examines initial meso-scale vortex effects on the motion of a tropical cyclone （TC） in a system where coexisting two components of TC and meso-scale vortices with a barotropic vorticity equation model. The initial mesoscale vortices are generated stochastically by employing Reinaud＇s method. The 62 simulations are performed and analysed in order to understand the statistical characteristics of the effects. Results show that the deflection of the TC track at t = 24 h induced by the initial meso-scale vortices ranges from 2 km to 37 km with the mean value of 13.4 km. A more significant deflection of the TC track can be reduced when several initial meso-scale vortices simultaneously appear in a smaller TC circulation area. It ranges from 22 km to 37 km with the mean value of 28 km, this fact implies that the initial meso-scale vortices-induced deflection may not be neglected sometimes.

关 键 词：meso-scale vortex tropical cyclone statistical characteristics 

分 类 号：P444[天文地球—大气科学及气象学]