A Study of the Effect of Topography on the Merging of Vortices  

作　　者：陈联寿 罗哲贤 

机构地区：[1]Chinese Academy of Meteorological Science, Beijing 100081 [2]Nanjing Institute of Meteorology, Nanjing 210044

出　　处：《Advances in Atmospheric Sciences》2004年第1期13-22,共10页大气科学进展（英文版）

基　　金：supported jointly by the“973”Project on heavy rain in China,the National Natural Science Foundation of China under Grant No.40333028;the Science and Technology Department of China under special project 2001 DIA20026.

摘　　要：Eight sets of numerical experiments are performed in 48 hours of integtation by using a barotropic primitive equation model with a topographic term so as to investigate the effect of topography on the merging of vortices. It is pointed out that the introduction of topography may change the track of vortices, and it causes the low vortices and vorticity lumps to be detained on the southeast side of the topography, thus creating a favorable condition for the merging of the low vortex and vorticity lumps. It is also shown that the effect of topography may cause double mergers of vortices in a horizontally shearing basic flow, and it can strengthen the low vortex remarkably.Eight sets of numerical experiments are performed in 48 hours of integtation by using a barotropic primitive equation model with a topographic term so as to investigate the effect of topography on the merging of vortices. It is pointed out that the introduction of topography may change the track of vortices, and it causes the low vortices and vorticity lumps to be detained on the southeast side of the topography, thus creating a favorable condition for the merging of the low vortex and vorticity lumps. It is also shown that the effect of topography may cause double mergers of vortices in a horizontally shearing basic flow, and it can strengthen the low vortex remarkably.

关 键 词：TOPOGRAPHY VORTEX vortices merger 

分 类 号：P435[天文地球—大气科学及气象学]