台风“狮子山”与中纬度系统相互作用所致暴雨成因分析  

Analysis of Rainstorm Caused by the Interaction between Mid-Latitude System and the Typhoon Lionrock

作　　者：任丽[1] 赵玲[1] 孙磊[2] 韩冰[1] 张月[1] REN Li;ZHAO Ling;SUN Lei;HAN Bing;ZHANG Yue(Heilongjiang Meteorological Observatory,Harbin 150030,China;Suihua Meteorological Bureau,Harbin 152002,China)

机构地区：[1]黑龙江省气象台,黑龙江哈尔滨150030 [2]绥化市气象局,黑龙江哈尔滨152002

出　　处：《沙漠与绿洲气象》2019年第1期44-51,共8页Desert and Oasis Meteorology

基　　金：黑龙江省龙云气象科技有限责任公司气象院士工作站(YSZD201702)资助

摘　　要：使用常规观测资料和NCEP FNL的1.0°×1.0°气象再分析资料,对2016年第10号(简称1610号)台风"狮子山"北上与中纬度系统相互作用在中国东北地区引发暴雨过程进行追踪和诊断分析,探究此次暴雨天气发生、发展的动力学、热力学和不稳定机制。分析结果表明:东北地区的强降水先后由西风带低涡和台风"狮子山"2个系统活动造成。在2个气旋逐渐接近过程中,台风东北侧的东南急流把海上的热量和水汽向低涡环流输送,在倒槽切变处辐合抬升,产生暴雨。大暴雨区位于倾斜锋区附近,对流稳定,中层存在湿对称不稳定,有利于加强降水强度。东北地区东部处于高空急流核右后方和低空急流核前方,高、低空急流耦合的区域,使高层强辐散和低层强辐合叠置,加强了暴雨区的上升运动,从而加强了降水强度。地形对暴雨有增幅作用。Based on the conventional observational data and NCEP 1°×1° reanalysis data,the dynamics,thermodynamics and unstable mechanism of the occurrence and development of the rainstorm were analyzed,which was triggered by the interaction between the typhoon Lionrock(1610)moving north and mid-latitude system in northeast China.The major conclusions were as follow:the heavy precipitation in northeast China was caused by the low vortexes of the westerly wind belt and the typhoon Lionrock.During the gradual approach of the two cyclones,the southeast jet on the northeast side of the typhoon sent the heat and water vapor which were convergence in shear area of inverted trough and resulted in heavy rainfall from sea to the low eddy circulation.The heavy rainfall area was located near the inclined frontal zone which has convective stability and moist symmetry instability in the middle layer.Such a configuration was conducive to strengthening precipitation intensity.The eastern part of the northeast China was located on the right rear of the upper jet nuclear and the left front of the low jet nuclear.The coupling area of high-low jet induced high divergence area overlaying on the low convergence area,which consequently led to the enhancement of ascending movement and strengthening of the precipitation intensity.The terrain had an amplitude effect to rainstorm.

关 键 词：台风 低涡 湿位涡 地形 

分 类 号：P458.1[天文地球—大气科学及气象学]