2019年雷州半岛首场暴雨过程分析  

Analysis of the First Hard Rain of 2019 in Leizhou Peninsula

作　　者：陈海亮 钟谢非 劳汉琼 梁峰铭 邝家豪 CHEN Hai-liang;ZHONG Xie-fei;LAO Han-qiong;LIANG Feng-ming;KUANG Jia-hao(Meteorological Bureau of Zhanjiang,Zhanjiang 524001)

机构地区：[1]湛江市气象局,广东湛江524001

出　　处：《广东气象》2022年第4期11-15,共5页Guangdong Meteorology

基　　金：湛江市气象局科研项目(2018A02)。

摘　　要：利用自动站、多普勒雷达、风廓线等观测资料,结合欧洲中期数值预报中心分析场0.125°×0.125°逐6 h资料,对2019年雷州半岛3月23日出现的首场暴雨进行分析。结果表明:(1)该次暴雨过程突发性强、降水强度大、局地性明显;(2)冷空气西路南下,冷锋进入倒槽,形成锋面倒槽,是引起该次暴雨过程的主要原因。当强降水在锋面启动后,强降水区向东南方向移动;(3)雷州半岛的东海岛短暂的锢囚锋是雷州半岛东部局地强降水的有利条件,也是东海岛局地特大暴雨和雷州半岛东南部暴雨形成的原因;(4)上下层湿度分布不均、饱和湿层低、中高层较干,该次对流暴雨过程也伴随出现了8~9级短时雷雨大风。Using observations from automatic weather stations,Doppler radars and wind profilers and with the use of the 0.125°×0.125°analysis fields,available every 6 hours,from the ECMWF,this work analyzes the first hard rain of 2019 that happened on March 23 in the Leizhou Peninsula.The results are shown as follows.(1)The hard rain took place abruptly and intensely and was much local.(2)It was caused mainly by cold air heading southward from the western route and a cold front advancing into a re⁃versed trough.After initiating on the frontal surface,the area of intense rain started to move to the south⁃east.(3)An occluded front briefly staying over the Donghai Island of the peninsula provided favorable con⁃ditions for the local and intense hard rain in the eastern part of the peninsula and was responsible for an unu⁃sually hard rain local to the Donghai Island and a hard rain in the southeastern part of the peninsula.(4)Due to uneven distribution of humidity between upper and low levels,low altitudes of a saturated layer and relatively dry mid⁃and upper⁃levels,the hard rain was also convective with short⁃range thunderstorm and high winds up to 8 to 9 on the Beaufort scale.

关 键 词：天气学 强对流 西路冷空气 锋面 欧洲中期数值预报中心 雷州半岛 

分 类 号：P44[天文地球—大气科学及气象学]