摘要
采用NCEP 2.5°×2.5°每6 h再分析格点资料,对1979年1月9—12日西北太平洋地区一次爆发性气旋进行了诊断分析,重点讨论了气旋爆发的天气学特征和动力因子。结果表明:爆发性气旋的发展具有明显的非地转特性,高低空急流的耦合作用、涡度平流和凝结潜热的释放是气旋爆发性发展的主要强迫因子;爆发性气旋处于高空急流之下的对流层锋区,大气的斜压性很强,斜压能量是气旋初期生成和发展动能的主要来源。
With the diagnostic analysis of an explosive cyclone occurred in Northwest Pacific,the synoptic characteristics and dynamic factors of the explosive cyclone are mainly discussed by using grid-point field from NCEP in this paper.The main results are as follow： The development of the explosive cyclone has an obvious characteristic of ageotropism.The role of coupled high/low jets,advection of potential vorticity and condensation latent heat release are important forcing factors of the explosive development of the cyclone.This explosive cyclone occurred in a tropospheric frontal zone under the high jet and barocline was strong.The baroclinic energy was a main supply of the kinetic energy when the cyclone formed and developed in initial stages.
出处
《暴雨灾害》
2009年第3期251-254,276,共5页
Torrential Rain and Disasters
关键词
爆发性气旋
急流
非地转
诊断分析
Explosive cyclone
Jet
Ageotropism
Diagnostic analysis
