【摘要】 利用常规观测资料和各种物理量场,对2010年5月4日内蒙古锡林郭勒盟(以下简称锡盟)出现的最大范围的大到暴雨天气过程的环流特征及物理量进行分析。结果表明:强烈的上升运动和水汽条件,为大到暴雨天气的产生提供了良好动力和水汽条件;高空冷槽、低层稳定切变、低空急流是此次过程的主要影响系统,高层辐散,低层辐合的配置产生了大范围上升运动,西南涡的维持为锡盟地区建立了充沛的水汽通道,动力抬升、充沛的水汽和长时间维持的低涡是这次降水的主要条件。更多还原

【Abstract】 Using conventional observational data and various physical quantity field,the circulation characteristics and physical quantity of weather process of maximum scope heavy-hard rain that happened in Xilin Gol league was analyzed on May 4th,2010.The results showed that strong upward motion and moisture conditions provided a good momentum and moisture conditions for the production of heavy-hard rain,and high-altitude cold vortex,the stable lower layers shear,low-level jet stream were the main influence system.The configurations of high-level divergence and low-level convergence produced a wide range of ascending motion.The maintenance of the southwest vortex area established abundant water vapor channel for the Xilin Gol league.The main precipitation conditions were dynamic lifting,abundant moisture and the low vortex maintain for a long time.更多还原