西北地区一次斜压槽引发的强沙尘暴研究  

Study of a Dust-devil caused by tilted trough in Northwest China

作　　者：徐建芬[1] 孙兰东[1] 许东蓓[1] 王宝鉴[1] 

机构地区：[1]兰州中心气象台,甘肃兰州730020

出　　处：《干旱气象》2001年第2期40-44,共5页Journal of Arid Meteorology

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.

关 键 词：沙尘暴 斜压槽 次级环流 

分 类 号：P425.5+5[天文地球—大气科学及气象学] P458