环渤海地区一次锋面强降水天气过程诊断分析  

Diagnostic Analysis of a Frontal Heavy Precipitation Process in Bohai Sea Surrounding Area

作　　者：高清源[1] 金巍[1] 高清泉 田璐[1] 韩颖[1] 徐庆喆 GAO Qing-yuan(Anshan Meteor-ological Bureau,Anshan,Liaoning 114000)

机构地区：[1]鞍山市气象局,辽宁鞍山114000 [2]廊坊市气象局,河北廊坊065000

出　　处：《农业灾害研究》2021年第8期64-65,67,共3页Journal of Agricultural Catastrophology

摘　　要：本文利用NCEP再分析资料,对2010年7月19日环渤海地区一次锋面强降水过程进行了诊断分析。结果表明:此次强降水是由冷暖气流交汇产生的,低层暖湿空气被迫抬升,形成锋面强降水天气;高低空急流的耦合作用,与锋面抬升作用相叠加,上升运动进一步加强;高空急流抽吸作用、高低空急流耦合作用以及锋面抬升作用,三者共同造成了深厚强烈的上升运动,是此次强降水主要的动力抬升机制;干冷空气随时间从高层逐渐向低层延伸,表现为干冷空气随着下沉气流向低层输送,具有明显的干侵入特征。Based on NCEP/NCAR reanalysis data,a frontal heavy precipitation process around Bohai Sea on July 19,2010 was diagnosed and analyzed.The results show that:the heavy precipitation around Bohai Sea is caused by the intersection of cold and warm air,the warm and wet air in the lower layer is forced to rise,forming the front heavy precipitation weather.The coupling effect of high-level jet and low-level jet is superimposed with frontal uplift,and the upward movement is further strengthened.The suction of upper level jet,the coupling of upper level jet and low level jet,and the frontal uplift jointly lead to the deep and strong upward movement,which is the main dynamic uplift mechanism of the heavy rainfall.The dry cold air gradually extends from the upper troposphere to the lower troposphere with time,which shows that the dry cold air is transported to the lower troposphere with sinking air,and has obvious dry invasion characteristics.

关 键 词：锋面 耦合 干侵入 动力抬升 

分 类 号：P458.121[天文地球—大气科学及气象学]