不同低层湿度条件下青岛两次气旋暴雨过程分析  

Analysis of Two Cyclone Heavy Rain Processes with Different Low-Level Humidity Conditions in Qingdao

作　　者：刘煦 马艳 凌艺 江敦双 万夫敬 Liu Xu;Ma Yan;Ling Yi;Jiang Dunshuang;Wan Fujing(Qingdao Meteorological Service,Shangdong,Qingdao 266003;Qingdao Engineering Technology Research Center for Meteorological Disaster Prevention,Shangdong,Qingdao 266003)

机构地区：[1]山东省青岛市气象局,青岛266003 [2]山东省青岛市气象灾害防御工程技术研究中心,青岛266003

出　　处：《气象科技》2019年第5期818-829,共12页Meteorological Science and Technology

基　　金：青岛市气象局科研项目（2016qdqxq17）资助

摘　　要：利用常规气象观测资料和ECMWF再分析资料,对2013年5月26-27日(简称"05·26"过程)和2014年5月10-11日(简称"05·10"过程)青岛的两次气旋暴雨过程进行对比分析。结果表明:"05·26"过程强降水开始前850hPa相对湿度大,降水持续时间长,"05·10"过程强降水开始前850hPa相对湿度小,且具有明显的短时强降水的特征。较好的低层风速、湿度条件,持续较长的上升运动以及源源不断的水汽输送是"05·26"过程降水时间长,累计雨量大的主要原因。地面辐合线的触发作用以及强的垂直上升速度则是"05·10"过程产生短时强降水的有利条件。Based on the conventional meteorological observation data and ECMWF reanalysis data,two cyclone heavy rain processes in 26 and 27 May 2013(Process 0526)and 10 and 11 May 2014(Process0510)in Qingdao are analyzed.The results indicate that in Process 0526,the relative humidity at 850 hPa before the heavy rain was higher and the duration of rainfall was longer,and in Process 0510,the relative humidity at 850 hPa before the heavy rain was lower and the duration of rainfall was shorter,but stronger.The main causes of longer duration and the larger accumulated of Process 0526 was the better low-level wind speed and relative humidity conditions and long-lasting upward motion,as well as continuous water vapor transport.In the process of Process 0510,the ground convergence line was a key factor in triggering the short-time extreme heavy rainfall,and the stronger upward motion was favorable for the short time extreme heavy rainfall.

关 键 词：气旋暴雨 水汽输送 低空急流 对比分析 

分 类 号：P458[天文地球—大气科学及气象学]