摘要
利用１９９４年６～８月ＧＭＳ－４红外展宽数字资料，统计和分析了青藏高原上２９３个中尺度强对流系统（ｓ－ＭＣＳ）的活动．结果表明，它们在高原上活动频繁，并且其生命史、水平尺度及强度具有较典型的中－β尺度系统特征；它们的形成和发展主要是由于地形热力效应；它们的移动方向与３００～２００ｈＰａ间的平均气流方向大体一致，并且极少移出高原．
By using GMS-4 hourly IR stretched digital data from June through August 1991, all293 severe Mesoscale Convective Systems (s-MCSs) Over Tibetan Plateau were investigatedand analysed. The results show that those s-MCSs had larger frequency and more typicalfeatures of meso-β scale system in its life cycle, size and intensity ; their initiation and development was mainly derived from the thermotopographic effect; their movement basicallyconsorted with the mean flow between 300 and 200 hpa, and few of them moved away fromTibetan Plateau.
出处
《应用气象学报》
CSCD
北大核心
1996年第4期473-478,共6页
Journal of Applied Meteorological Science
基金
高原试验研究预研项目
关键词
青藏高原
中尺度
强对流系统
时空分布
Tibetan Plateau
Severe Mesoscale Convective System (s-MCS)
Spatial andtemporal scales.
