Large Scale Perturbations in Extratropical Atmosphere-Part Ⅰ: On Rossby Waves  

作　　者：Y. L. McHall 

机构地区：[1]Department of Earth, Atmospheric and Planetary Sciences, MIT, MA 02139, USA

出　　处：《Advances in Atmospheric Sciences》1993年第2期169-180,共12页大气科学进展（英文版）

摘　　要： This study reexamines the propagation mechanism and geostrophic property of the classical two-dimensional Rossby waves in a non-divergent barotropic atmosphere. It will be found that propagation of large scale atmospheric waves depends crucially on horizontal divergence. A small Rossby number in Rossby waves is not sufficient for the waves to have a small ageostrophic component, because the two-dimensional classical Rossby waves do not manifest the geostrophic balance as good as observed in the atmosphere.This study reexamines the propagation mechanism and geostrophic property of the classical two-dimensional Rossby waves in a non-divergent barotropic atmosphere. It will be found that propagation of large scale atmospheric waves depends crucially on horizontal divergence. A small Rossby number in Rossby waves is not sufficient for the waves to have a small ageostrophic component, because the two-dimensional classical Rossby waves do not manifest the geostrophic balance as good as observed in the atmosphere.

关 键 词：TH Large Scale Perturbations in Extratropical Atmosphere-Part On Rossby Waves 

分 类 号：P4[天文地球—大气科学及气象学]