不同雨强台风的诊断对比与数值试验研究
投稿时间:1994-03-25  修订日期:1994-12-20  点此下载全文
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作者单位
丁治英 南京气象学院气象学系, 南京, 120044 
陈久康 南京气象学院气象学系, 南京, 120044 
基金项目:“85-906-07-04-02”课题资助
中文摘要:通过对不同雨强台风的诊断对比及数值试验得出一些结论。台风暴雨与锋区、高低空急流有关。强锋区可导致200hPa西南风高空急流与右后方非地转辐散的加强,并在其作用下,激发重力惯性波。其调整过程,即为暴雨的突然增幅过程。调整时间约3~6小时。调整过程使低空急流加强,加大向暴雨区的水汽动量输送,有利于降水加强。调整过程结束后,雨量变化平稳。
中文关键词:台风  对比  锋区  高空急流
 
DIAGNOSIS,COMPARATIVE ANAL YSIS AND SIMULATION OF TYPHOONS WIHD DIFFRENT RAINFALL INTENSITIES
Abstract:Some conclusions have drawn from the diagnosis,comparative analysis and numerical study of typhoons with varied precipitation intensities. It is found that the typhoon rainstorm is associated with the presence of a frontal zone,high- and low-level jet;an intense frontal zone is responsible for the enhancement of 200 hPa southwesterly jet and ageostrophic divergence on the rear right,whose effect will excite gravity-inertia waves;the adjustment(spanning 3~6h)is none other than the abrupt intensification of the rainstorm,giving rise to the strengthening of low level jet that carries abundant water and momentum into the rainfall area for still heavier rain;after the ending of the adjustment,precipitation is kept steady.
keywords:typhoon  comparative analysis  frontal zone  high-level jet
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