摘要
通过对涡动动能方程和涡动有效位能方程的诊断分析，结果发现，斜压性是导致风暴轴入口区天气尺度涡动发展的最主要原因，而涡动发展后则主要通过非地转位势通量向下游频散能量而衰减，并进一步成为激发下游新的涡动活动发展的主要能量来源。因此，涡动非地转位势通量所引起的“下游发展效应”对风暴轴在东端弱斜压区的维持具有十分重要的作用。
A diagnostic analysis is conducted of the local eddy kinetic and potential energy functions. Evidence suggests that due to the strong baroclinicity in the entrance area of the storm tracks, the synoptic eddies there are mainly developed through baroclinic energy conversion, yet weakened by radiating large energy downstream via eddy ageostrophic geopotential fluxes, which (so called downstream developing), is in turn, the predominant energy source to intrigue further disturbances downstream, and plays an important role in the maintenance of the tracks in their eastern parts with weaker baroclinicity.
出处
《大气科学》
CSCD
北大核心
2001年第1期71-78,共8页
Chinese Journal of Atmospheric Sciences
基金
国家自然科学基金 49475258
关键词
风暴轴
斜压性
非地转
能量
storm tracks
baroclinicity
ageostrophic
energy
