内蒙古中西部一次强沙尘暴天气过程的诊断分析Ⅰ——背景场分析

Diagnostic analysis of a server sandstorm in the midwest Inner Mongolia

利用NCEP/NCAR再分析资料和自动站观测资料对2009年4月23日-24日出现在我国内蒙古中西部的一次强沙尘暴天气过程,从高低空环流系统配置、风速场方面对沙尘暴影响机理进行了分析研究。结果表明:这次强沙尘暴的主要影响系统是蒙古气旋;高空动量下传对沙尘暴发展有重要作用。

According to the encryption sounding data, the automatic meteorological observing data and the conventio observing data, we analyzed a case of weather events occurred in the Midwest Inner Mongolia Autonomous Region on April 23 -24, 2009. The high and low air circulation system configuration and the momentum have been studied, The result showed that： （ I ） Mongolian cyclone was the main system producing the strong dust sorm. （2） The momentum of the high ahitude was of the great importance factor for sandstorm development.