摘要
为了研究山西省中南部的强降水天气形成过程,利用常规观测资料和Micaps系统提供的资料,使用天气学诊断方法,对2012年7月8—10日发生在中南部的强降水的过程进行了分析,研究了发生强降水的影响系统和高低空流型配置,以及产生较强降水的物理机制。结果表明:较强降水发生在700 h Pa与850 h Pa"人"字型切变线的暖式切变线之间;低层幅合大值中心,对应降水较强;低层水汽幅合,中高层水汽幅散的长时间维持,保证了水汽上升运动的较长时间维持;高能舌走向与700 h Pa切变线走向一致,与干线走向一致。
The paper aims to analyze a strong precipitation weather process happened in the south-central part of Shanxi Province between July 8 to 10 in 2012, the author took general observation data and the data supplied by Micaps system, and used weather diagnosis methods to analyze the effect system of the strong precipitation, high and low air flow pattern configuration and the physical mechanism which produced strong precipitation. The results showed that： strong precipitation happened between 700 hPa and 850 hPa in the warm shear line of the ＂herringbone＂ shear line; the large value centre of the low layer of convergence was corresponding to the strong precipitation. The long-time maintaining of the convergence of the low layer aqueous vapour and the divergence of aqueous vapour at the middle and high layers ensured the longer time upward movement of the vapour, the movement of high energy tongue was in accordance with the movement of 700 hPa shear line, and was also in accordance with the movement of main line.
出处
《中国农学通报》
2015年第32期174-180,共7页
Chinese Agricultural Science Bulletin
关键词
山西中南部
区域性强降水
流型配置
物理量诊断
south-central Shanxi
regional strong precipitation
configuration
physical diagnosis
