固安县“8·8”短时强降水过程分析  

Analysis of Short-term Heavy Rainfall Process of “8·8” in Gu′an County

作　　者：洪亚青 郭立平 金鹏举 彭敏 石茗化 HONG Ya-qing;GUO Li-ping;JIN Peng-ju;PENG Min;SHI Ming-hua(Gu′an Meteorological Bureau of Hebei Province,065500;Langfang Meteorological Bureau)

机构地区：[1]河北省固安县气象局,河北固安065500 [2]廊坊市气象局

出　　处：《现代农业科技》2019年第24期156-159,共4页Modern Agricultural Science and Technology

摘　　要：利用国家卫星气象中心和固安的降水资料、FNL再分析资料(1°×1°),从环流背景、物理量诊断、卫星云图特征等方面对2018年8月8日固安县一次短时强降水过程进行天气动力学诊断和中尺度分析。结果表明,受副高边缘西南暖湿气流和西风槽冷空气共同影响,8日白天固安县出现短时强降雨。强降水产生于有利的天气尺度系统配置中,中层干、下层湿的层结;中低层暖区,高层冷区的不稳定温度场配置;固安K指数>37.5℃,更易存在较强对流不稳定潜势。地形对短时强降雨的强度以及落区等起重要作用。Using the National Satellite Meteorological Center and Gu′an precipitation data,FNL reanalysis data(1°×1°),a short-term heavy precipitation process in Gu′an County on August 8,2018 was analyzed by weather dynamics and mesoscale analysis from the aspects of circulation background,physical quantity diagnosis and satellite cloud image characteristics.The results showed that affected by the warm and humid airflow in the southwest of the subtropical high and the cold air in the west wind trough,there was a short-term heavy rainfall in Gu′an County during the day.Heavy precipitation was produced in a favorable weather scale system configuration,the middle layer was dry and the lower layer was wet;the middle and lower layer warm area,the unstable temperature field configuration of the high-rise cold area;the K index of Gu′an County was greater than 37.5℃,it was more prone to strong convective instability potential.The terrain played an important role in short-term heavy rainfall intensity and falling area.

关 键 词：短时强降水 环流背景 物理量诊断 卫星云图 地形作用 河北固安 

分 类 号：P426.6[天文地球—大气科学及气象学]