CAJ | 학술논문

利用NCAR/NCEP再分析（1°×1°）资料，区域自动站观测、FY-2D/2E卫星观测和GPS/MET水汽监测等资料，对2012年6月7-18日长春地区发生在同一东北冷涡系统不同演变阶段的3次强对流天气过程进行对比诊断分析。结果表明：在冷涡形成期，高低空急流耦合产生的次级环流上升支，触发锋前不稳定能量释放，导致中β尺度孤立深厚湿对流系统出现；在冷涡发展期，对流层高层干冷空气向对流层中下层侵入，形成高空露点锋，触发有组织的中α尺度对流系统；在冷涡消亡期，低涡减弱为高空槽并快速东移，其后部冷空气置于低层大范围暖湿空气之上，地面中尺度辐合触发不稳定能量释放，形成中β尺度对流系统。
이용NCAR/NCEP재분석（1°×1°）자료，구역자동참관측、FY-2D/2E위성관측화GPS/MET수기감측등자료，대2012년6월7-18일장춘지구발생재동일동북랭와계통불동연변계단적3차강대류천기과정진행대비진단분석。결과표명：재랭와형성기，고저공급류우합산생적차급배류상승지，촉발봉전불은정능량석방，도치중β척도고립심후습대류계통출현；재랭와발전기，대류층고층간랭공기향대류층중하층침입，형성고공로점봉，촉발유조직적중α척도대류계통；재랭와소망기，저와감약위고공조병쾌속동이，기후부랭공기치우저층대범위난습공기지상，지면중척도복합촉발불은정능량석방，형성중β척도대류계통。
Using the NCEP/NCAR reanalysis data with 1 °×1 °spatial resolution,meteorological data from regional automatic weather stations (AWS),FY-2D/2E satellite image and GPS/MET data,three severe convective weath-er events in different stages of Northeast China cold vortex on June 7 to 18,2012 over Changchu area were diag-nosed and compared.The results show that during the forming stage of Northeast China cold vortex,an isolated-deep-moist convection of meso-β-scale is triggered by the ascending branch of secondary circulation induced by coupled high/low jets.During the developing stage of Northeast China cold vortex,a convective system of meso-α-scale is triggered by invasion of dry-cold air from upper to middle and lower troposphere,so forms an upper dew point front at the same time.During the weakening stage of Northeast China cold vortex,a convective system of meso-β-scale is formed by the weakening of Northeast China cold vortex to an upper trough moving eastward, whose rear part is cold air above the large range of low-level warm and moist air,and surface meso-scale conver-ges in the same time.