高原低涡中涡旋波动特征的初步分析  

Preliminary Theoretical Study of Waves in the Tibetan Plateau Vortex

作　　者：李国平[1] 罗喜平 陈婷[1] 陈功[3] 

机构地区：[1]成都信息工程学院大气科学学院/高原大气和环境四川省重点实验室,四川成都610225 [2]贵州省气象台,贵州贵阳550002 [3]中国气象局成都高原气象研究所,四川成都610072

出　　处：《高原气象》2011年第3期553-558,共6页Plateau Meteorology

基　　金：国家自然科学基金项目(40875023;41065003);灾害天气国家重点实验室开放课题(2009LASW-A01)共同资助

摘　　要：将青藏高原低涡(下称高原低涡)视为受加热强迫的边界层内涡旋,分别研究了直角坐标系正压模型和柱坐标系正压模型中高原低涡所含的波动,揭示了高原低涡中各类波动的频散关系及其基本特征,对比分析了两种模型下所得结果的异同,讨论了高原低涡中的波动与流场特征的联系。本研究认为高原低涡既含有涡旋Rossby波又含有惯性重力外波,这对于加深认识高原低涡及其对高原下游广大地区天气的影响以及影响途径具有重要意义。The Tibetan Plateau Vortex（TPV） was assumed as vortices in boundary layer forced by diabatic heating in this article.On this basis,the dispersion relation and characteristics of various types of waves in TPV were deduced by working out and contrasting the linear model in orthogonal coordinate and in cylindrical coordinates,respectively,and comparison of results by those two models is given.In addition,the relationship between waves and characteristics of flow field of the vortex were also discussed.It is summarized that TPV may contain inertia-shallow gravity waves and vortex Rossby waves,this is very important to understand the TPV and its effects on the weather in the downstream of the Tibetan plateau.

关 键 词：高原低涡 流场 频散关系 涡旋ROSSBY波 惯性重力外波 

分 类 号：P433[天文地球—大气科学及气象学]