房山区2021年汛期一次强对流天气过程分析  

Analysis of a Severe Convective Weather Process in Flood Season of Fangshan District in 2021

作　　者：安祎聪 马俊岭 宋歌 徐冰 An Yicong;Ma Junling;Song Ge;Xu Bing(Fangshan District Meteorological Service,Beijing 102488,China)

机构地区：[1]北京市房山区气象局,北京102488

出　　处：《黑龙江科学》2022年第24期46-48,共3页Heilongjiang Science

基　　金：北京市气象局青年基金项目“RMAPS-NOW在房山区强对流天气中的应用”(BMBKJ202003017)。

摘　　要：利用Micaps常规气象观测及北京南郊观象台高空探测和风廓线、多普勒天气雷达和X波段雷达组网等资料,对2021年8月23日房山区汛期一次强对流天气过程进行分析。结果表明,此次强对流天气过程是受冷涡和高空槽东移共同影响,位于山东半岛的低涡气旋头部有偏东风发展,偏东风掀起了渤海湾地区海风锋对流的发展,率先影响到了河北东部、京津冀地区,移动过程中与冷涡高空槽系统合并,加之房山区特有的地形作用,配合偏东风在山前辐合加强,这是造成此次局地暴雨的重要因素。从当日不同时次探空来看,CAPE值和DCAPE值均较高,中低层湿度深厚,中高层有明显干侵入,0℃层、-20℃层高度较好,这样的探空对于产生短时强降水、大风、冰雹是十分有利的。The study uses the data from Micaps routine meteorological observation, and the aerological sounding and wind profile, Doppler weather radar and X ray radar of the observatory in southern suburbs in Beijing;and analyzes the convective weather in Fangshan District on Aug. 23, 2021. The results show that the convective weather is influenced by cold vortex and upper trough eastward-moving. The head of vortex in Shandong Peninsula develops to partial east wind. The partial east wind raises the development of sea breeze front convection in Bohai Bay area, and influences East Hebei, and Beijing, Tianjin and Hebei Area, combines with cold vortex upper trough system when moving. The important factor of the local storm is the special terrain of Fangshan District, with the easterly wind in front of the mountain convergence strengthening. From different air soundings on the day, CAPE and DCAPE values are relatively high, with great humidity in middle and low layer, and obvious stem invasion in middle and high layer. Those in the height of 0℃ and-20℃ layers are relatively good. This sounding is beneficial to short time heavy precipitation, high wind and hail.

关 键 词：风廓线 海风锋 地形作用 山前辐合 

分 类 号：P458.121.1[天文地球—大气科学及气象学]