摘要
利用常规观测资料和NCEP 2.5°×2.5°网格再分析资料,对2009年4月16日天山翻山大风的物理机制进行了诊断分析。结果表明:高空急流、垂直环流共同作用是高空动量下传的重要动力机制,500～850 hPa较深厚的强冷平流输送是翻山大风形成的热力因子。同时得到天山翻山大风一些有益的预报指标。
Using conventional observation and NCEP（2.5°×2.5°lat/lon） reanalysis data,the physical mechanism of the gale across Tianshan Mountains in April 16,2009 was diagnosed and analyzed.The results showed that the interaction of upper jet-stream and vertical circulation was the vital dynamic mechanism of downward momentum transferring from upper air.The transportation of deep and strong cold advection between 500 hPa and 850 hPa was the thermodynamical factor for the strong wind across mountain formation.Meanwhile,some helpful forecast indices about gale across Tianshan Mountains were acquired.
出处
《沙漠与绿洲气象》
2011年第1期13-17,共5页
Desert and Oasis Meteorology
关键词
天山翻山大风
物理机制
预报指标
gale across Tianshan Mountains
physical mechanism
forecast index
