台风布拉万(1215)北上引发辽东半岛强降水的诊断分析  

Diagnostic Analysis of Torrential Rain Associated with Typhoon Bolaven(1215) over Liaodong Peninsula

作　　者：梁军 张胜军[2] 李婷婷 张黎红 冯呈呈 张彩凤 LIANG Jun;ZHANG Shengjun;LI Tingting;ZHANG Lihong;FENG Chengcheng;ZHANG Caifeng(Dalian Meteorological Observatory of Liaoning Province,Dalian 116001,Liaoning,China;State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China)

机构地区：[1]辽宁省大连市气象台,辽宁大连116001 [2]中国气象科学研究院灾害天气国家重点实验室,北京100081

出　　处：《干旱气象》2018年第6期990-996,1051,共8页Journal of Arid Meteorology

基　　金：国家重点基础研究发展规划项目(2015CB452804);国家自然科学基金项目(41475055;41275066;41575063);环渤海区域科技协同创新基金项目(QYXM201615;QYXM201702;QYXM201711)共同资助

摘　　要：利用中国气象局热带气旋年鉴、FY-2E卫星黑体亮度温度(TBB)产品(0. 1°×0. 1°)、大连地区逐时自动气象站雨量资料、常规观测资料和欧洲中期数值预报中心(ECMWF) ERA-Interim全球再分析资料(0. 125°×0. 125°),对1215号台风"布拉万"(Bolaven)北上引发辽东半岛东部强降水过程的环流背景和中尺度特征进行诊断分析。结果表明:(1)副高西脊点稳定在130°E附近有利于台风Bolaven北上,其与1214号台风"天秤"(Tembin)及副高之间所形成的偏南风低空急流为辽东半岛东部强降水提供了水汽和能量的补充。(2) Bolaven影响辽东半岛时处于变性减弱阶段,但位于辽东半岛东部和副高西侧的辐合带,为中尺度云团的形成和加强提供了有利的环境场。(3)辽东半岛相对于Bolaven的方位不同,其降水强度差异明显:西北侧低层水平辐合较强,水平风垂直切变较大,维持深厚上升运动,降水强度大;西南侧中低层下沉运动明显,动力抬升条件较弱,降水强度弱。(4)强降水与台风低层环流北侧辐合带内冷暖平流活动密切相关,冷暖平流交汇处对辽东半岛东部强降水有较好指示作用。Based on CMA Tropical Cyclone Yearbook,FY-2E temperature of brightness blackbody(TBB)product(0.1°×0.1°),hourly rainfall observations from Dalian’s automatic weather stations,conventional observation data and ERA-Interim reanalysis data(0.125°×0.125°),the characteristics of large scale circulation and mesoscale systems causing the torrential rain in Liaodong Peninsula as the typhoon Bolaven(1215)was moving northward were analyzed.The results are as follows:(1)It was favorable for typhoon Bolaven’s moving northward when the western ridge point of Western Pacific subtropical high(WPSH)steadily located near130°E.Southerly jet,which formed between the WPSH and the typhoon Bolaven,provided sufficient water vapor and energy for the rainstorm over Liaodong Peninsula.(2)The convergence zone which located over the eastern Liaodong Peninsula and the west side of WPSH provided a favorable environment field for the formation and strengthening of meso-scale cloud cluster during the period of the typhoon Bolaven impacting Liaodong Peninsula.And it just was at the stage of transition and weakening.(3)When Liaodong Peninsula located over different quadrant of Bolaven,it suffered from a very different rain intensity.When it located over the northwestern Bolaven,it suffered from a bigger rain rate with the intense low layer horizontal convergence,strong vertical wind shear and deep upward motion.When it located over the southwestern Bolaven,it met with a weaker rain rate with obvious subsidence movement and poor dynamic lifting condition.(4)Strong rainfall was closely related to the cold and warm advection at the lower layer in the north part of typhoon circulation,and the cold and warm advection intersection had a good indication for heavy rainfall in the eastern Liaodong Peninsula.

关 键 词：台风“布拉万” 辽东半岛 强降水 诊断 

分 类 号：P458.1[天文地球—大气科学及气象学]