云南局地暴雨分型研究  

Study on the local rainstorm classification in Yunnan Province

作　　者：马志敏[1] 杨素雨[1] 王治国 牛法宝[1] 连钰 朱莉[1] MA Zhi-min;YANG Su-yu;WANG Zhi-guo;NIU Fa-bao;LIAN Yu;ZHU Li(Yunnan Meteorological Observatory,Kunming 650034,China)

机构地区：[1]云南省气象台

出　　处：《云南大学学报（自然科学版）》2020年第1期108-118,共11页Journal of Yunnan University(Natural Sciences Edition)

基　　金：云南省科技厅社会发展项目(2018BC007);云南省气象局重点项目(TQ201701);云南省气象台山洪地质灾害防治气象保障工程2019年建设项目;国家重点研发计划课题(2018YFC1507603);中国气象局预报员专项(CMAYBY2016-068)

摘　　要：基于常规观测资料与NCEP再分析资料统计2011-2015年云南局地暴雨过程,对所选个例进行分型研究.结果表明:局地暴雨可分为副热带高压外围型、两高辐合型、切变线型、热带低压型、孟加拉湾槽型5种类型;副热带高压外围型与两高辐合型暴雨发生频率最高,即副热带高压影响下有利于产生局地暴雨过程;卫星云图显示,该型暴雨主要由MβCS系统直接产生,MαCS与层状云个例较少,强降雨区位于系统边缘,产生于系统移动发展或移动减弱过程中;强降雨区位于TBB梯度大值带,TBB降低时间提前强降雨开始时间2~3 h,强降雨发展滞后于云团发展.By counting the local rainstorm processes in Yunnan Province from 2011 to 2015,based on conventional observation data and NCEP re-analytical data,we divided and analyzed the cases of different types.The results show that the local rainstorms can be divided into five types,namely peripheral type of subtropical high,two-high convergence type,shear line type,tropical low pressure type and the Bay of Bengal trough type.The occurrence frequency of peripheral type of subtropical high and two-high convergence type is higher;that is to say,under the influence of subtropical high,it is advantageous to produce local rainstorm processes.The satellite cloud image revealed that,an MβCS causes such rainstorms directly,the MαCS and stratiform clouds are fewer,and the heavy rainfall areas are located at the edge of the system and occur in the processes of the system mobile development or mobile weakening.The heavy rainfall areas are located in the high value zone of TBB gradient,the TBB reduction takes place 2-3 hours prior to the start of the strong rainfall,and the development of heavy rainfall lags behind the cloud group development.

关 键 词：局地暴雨 MβCS 副热带高压 降雨强度 云南 

分 类 号：P426.6[天文地球—大气科学及气象学]