一次典型东北冷涡降水的过程分析  

Analysis of Cold Vortex Precipitation Process in Northeast China

作　　者：李铭鉴 宋佳 崔一鸣 宫勋 陈鑫 LI Mingjian;SONG Jia;CUI Yiming;GONG Xun;CHEN Xin(Tieling Meteorological Observatory,Tieling 112000,China;Xifeng County Meteorological Observatory,Xifeng 112400,China)

机构地区：[1]铁岭市气象台,辽宁铁岭112000 [2]西丰县气象台,辽宁西丰112400

出　　处：《安徽农学通报》2022年第8期173-180,共8页Anhui Agricultural Science Bulletin

摘　　要：选取2012年6月11-18日由东北冷涡造成的降水天气过程,采用常规和非常规气象观测资料、NCEP/NCAR再分析资料和卫星雷达资料,从大尺度背景场及中小尺度对流系统出发,从冷源条件、水汽条件、触发机制等方面进行诊断分析。结果表明,此次过程中冷涡来自上游小槽东移发展,冷涡中心与正涡度中心对应较好,冷涡发展初期低层有辐合、整层上升;而在成熟阶段,整层辐合上升运动则与冷涡的发展十分匹配;充足的水汽条件为此次冷涡降水提供了有利的条件。By using conventional observation data,NCEP/NCAR reanalysis data,radar data and satellite data,a diag⁃nostic analysis about northeast china cold vortex precipitation process from July 11th to 18th,2012 was performed.Large-scale circulation,the mainly precipitation systems,moisture condition,physic fields etc.were analyzed.The results showed:the cold vortex was caused by the small upstream troughs that moved to the east.A fine correspond⁃ing relationship between the vortex center and the center of positive vorticity was found.At early development stages,convergence occurred at low-level and the whole layer raised.At mature stage,the whole layer of convergence co rise coincides with the development of cold vortex;the moisture air delivered the cold vortex plentiful water vapor.

关 键 词：东北冷涡 区域降水 天气诊断分析 

分 类 号：P426.621[天文地球—大气科学及气象学]