双涡互旋的数值模拟试验  

A numerical simulation experiment on the rotation of the twin-vortex

作　　者：吴德辉[1] 连东英 

机构地区：[1]南京信息工程大学大气科学系,江苏南京210044 [2]三明市气象局,福建三明365000

出　　处：《台湾海峡》2005年第3期377-382,共6页Journal of Oceanography In Taiwan Strait

摘　　要：本文应用准地转正压无辐散模式对双涡的相互作用进行了数值模拟试验.试验结果表明:(1)只考虑相对涡度平流的情况下双涡以互旋为主,而且随着初始间距的缩小,互旋越来越明显.双涡的相互作用与它们的初始间距以及它们的强度和结构有密切的关系.(2)双涡的移动加速和减速都是出现在它们移动方向改变的时刻,当移动方向向逆时针方向变化时移速减慢,否则加快.A numerical simulation experiment is performed on the interaction of twin-vortex by using quasi-geostrophic barotropical non-divergence model. Results indicate that （1） the twin-vortex mainly shew rotation towards each other if only relative vorticity advection considered. This kind of rotation becomes more evident with the decreasing of the initial distance. The interaction of the rotation is closely related to their initial distance, strengths and structure, （2） the acceleration and deceleration of the movement of the twin-vortex happen when the vortex shift their movement direction.The speed gets reduced when vortex veers anti-clockwise and vice versa.

关 键 词：气象学 双涡互旋 数值模拟试验 热带气旋 

分 类 号：P444[天文地球—大气科学及气象学]