摘要
利用T10 6数值预报及常规气象资料 ,对 1998年 4月 15日西北地区强沙尘暴进行分析 ,分析结果表明 ,这是一次由斜压槽及冷锋锋生触发的沙尘暴 ,高空急流及其下部的Ferrel环流对沙尘暴发生起到重要作用 ;强沙尘暴发生在高空急流出口区右侧、5 0 0hPa正涡度中心下风方和次级反环流的上升运动区内。
A severe dust-devil,happened in northwest China on April 15 in 1998,was analyzed by using the normal meteorological data and NWP data of T106.The result shows the severe dust-devil caused by tilted trough and frontgenesins of cold front,high jet and Ferrel circulation are the main thermodynamics reason,severe dust-devil happened at the south side of high jet exit region and downwind of vorticity centre of 500hPa and ascending region of sub-circulation.
出处
《干旱气象》
2001年第2期40-44,共5页
Journal of Arid Meteorology
关键词
沙尘暴
斜压槽
次级环流
dust-devil
tilted trough
sub-circulation
