摘要
运用１小时间隔的ＧＭＳ－４数字展宽红外资料和部分常规气象资料，分析了１９９３年５月５日下午至夜间发生在甘肃和宁夏等省（区）部分地区罕见的特大沙尘暴的形成原因。结果指出，这场特大沙尘暴主要由强冷锋前部的中尺度对流系统（ＭＣＳ）及其伴随的飑线造成的。它们的移动大体与地面强冷锋及７００～５００ｈＰａ间的平均气流方向一致。最后对此ＭＣＳ及其伴随的飑线的可预报性问题作了简要讨论。
The casue of formation for the black s torm over the part regions of Gansu andNingxia provinces during late afternoon and early night on 5 May 1993 are investigatedusing GMS4 S-VISSR data every hour and conventional data. The results show that itwas mainly caused by mesoscale convective system with a squall line in advance of a coldfront. It moved eastward and basicallv consorted with 700～500 hPa mean flow. Thepredictability of this″black storm″is discussed.
出处
《应用气象学报》
CSCD
北大核心
1995年第2期177-184,共8页
Journal of Applied Meteorological Science
基金
国家非教育系统出国人员资金
关键词
沙尘暴
成因
卫星云图
Black storm
Mesoscale Convective System(MCS )
Squall line
Satellite imagery
