摘要
利用常规Micaps资料和自动站资料，从环流形势、物理量、数值预报等方面，对2015年9月13日石河子发生的大风沙尘暴天气过程进行分析。结果表明，前期升温快、空气土壤干燥，北方冷空气快速南下，风力达6级以上；K指数增幅大，SI指数梯度明显，大气层结不稳定；气压梯度大、有深厚强盛的垂直上升运动和冷平流，这些条件的相互配合有利于沙尘暴天气的发生发展。 ECMWF模式对于大风沙尘暴天气具有更好的指示和预报能力。
Abstract
By using conventional Micaps data and automatic station data, the sandstorm weather process on September 13, 2015 in Shihezi was analyzed from aspects of circulation situation, physical quantity and numerical forecast.The results showed that fast heating at earlier stage, dry soil, the northern cold air moving southward fast , wind up to 6 above, greatly increase of K index, obvious gradient of SI index, unstable atmos-pheric stratification, large pressure gradient, vertical ascending motion and deep strong cold advection are conducive to the occurrence and devel-opment of sandstorm weather .Indicating and forecasting ability of the ECMWF model is better for the dust storm .
国家科技期刊平台
NSTL
维普
万方数据