摘要
2018年7月24日傍晚至25日白天,黑龙江省自西向东出现了一次区域性的暴雨和局地极端短时强降水天气过程。利用常规资料对25日黑龙江省鹤北镇形成的局地极端短时强降水原因进行分析。结果表明:此次极端强降水过程是由多种影响系统共同作用造成的,通过订正探空站,其对流不稳定能量增加,层结曲线表现为明显的短时强降水特征,暖云层厚度大,降水效率高,此次降水过程是以积云为主的混合性降水回波,强回波中心强度多为50 dBz以下,且垂直方向上高度均在融化层以下,表明产生此次极端短时强降水的特征为低质心的热带海洋型降水。
A regional rainfall and local flash heavy rain occurred from west to east of Heilongjiang province during the evening of 24 to 25 July,2018.Aanalyzed the forming reason of local extreme rainfall in Hebei Town with conventional elements data.The result show that:This extreme rainfall was caused by a combination of influence systems;By correction sounding station,the convective instability increased,the stratification curve showed obvious flash heavy rain.Warm cloud thickness is large,precipitation efficiency is high;This precipitation was a mixed precipitation echo dominated by cumulus clouds.The intensity of main echo center is mostly below 50 dBz and the vertical height is below the melting layer.It indicated that the extreme heavy rainfall is characterized by the tropical ocean precipitation with low echo centroiding.
作者
周奕含
齐铎
韩冰
ZHOU Yi-han;QI Duo;HAN Bing(Meteorological observatory of Heilongjiang province,Heilongjiang Harbin 150030)
出处
《黑龙江气象》
2019年第4期6-7,12,共3页
Heilongjiang Meteorology
关键词
短时强降水
副热带高压
暖云降水
低质心降水
short-term heavy precipitation
subtropical high
warm cloud precipitation
low-echo-centroid precipitation
作者简介
第一作者:周奕含(1989-),女,黑龙江省哈尔滨市人,成都信息工程大学,本科生,工程师.
