肃北县一次暴雨天气过程分析

Analysis of a Rainstorm Process in Subei County

利用自动站实测资料、MICAPS系统中物理量场实况及FY2E卫星云图资料,从环流形势、物理量场、卫星云图方面,对2015年7月3日肃北县出现的一次暴雨天气过程进行诊断分析,结果表明:中高纬度亚洲地区两槽一脊型环流形势是造成此次暴雨的天气尺度系统;700 h Pa风场切变与500 h Pa相配合,有利于形成暴雨;充足的水汽是形成此次暴雨的必要条件。暴雨发生时高层辐散、低层辐合,形成了强烈的抽吸作用;对流层内出现较强的上升运动;中低层流场的配置有利于水汽的输送和汇聚。

Using the measured data of the automatic station, the physical field live in the MICAPS system and the FY2E satellite cloud data, a rainstorm weather process was analyzed from the circulation situation, the physical field and the satellite cloud map in Subei County on July 3lh, 2015. The results showed that the two troughs and one ridge circulation situation in the middle and high latitudes of Asia was the weather scale system which was caused by rainstorm. The 700 hPa wind field shear was matched with 500 hPa, which was favorable for the fomlation of rainstorm. Adequate water vapor was necessary to form the rainstorm. When the rainstorm occurs, the high-level divergence and low-level convergence formed a strung suction effect. There was a strong upward movement in the troposphere. The configuration of the flow field in middie and lower level was favorable for the transportation and convergence of water vapor.