CAJ | 학술논문

利用常规资料和NCEP再分析资料，对2011年8月1—2日河南省区域性暴雨过程的环流形势、水汽条件和垂直螺旋度进行了分析，结果发现：这次暴雨是一次较为典型的西南涡东北移影响河南所造成的暴雨过程，500hPa高原槽东移，副热带高压减退之后又增强，中低层西南涡沿切变线东北移出，河南处于涡前的西南低空急流出口区前方及前方左侧，具备了区域性暴雨产生的动力与水汽条件。在本次暴雨过程中，700hPa水汽通量变化对强降水落区有很好的指示作用：豫西南的暴雨区位于水汽通量大值中心附近和前端水汽通量等值线密集带内，豫中东部的暴雨区位于水汽通量大值中心北部水汽通量等值线密集带内、大值中心运动方向的左侧。水汽通量散度场上，850hPa水汽通量散度的变化与暴雨的开始时段和强度有很好的对应：水汽通量散度转为辐合、辐合层增厚为强降水开始的标志，辐合量突然增大标志着降水强度增大。700hPa垂直螺旋度的迅速增强与强降水发生时段有较好的对应，强降水产生在垂直螺旋度大值轴的东南侧。
이용상규자료화NCEP재분석자료，대2011년8월1—2일하남성구역성폭우과정적배류형세、수기조건화수직라선도진행료분석，결과발현：저차폭우시일차교위전형적서남와동북이영향하남소조성적폭우과정，500hPa고원조동이，부열대고압감퇴지후우증강，중저층서남와연절변선동북이출，하남처우와전적서남저공급류출구구전방급전방좌측，구비료구역성폭우산생적동력여수기조건。재본차폭우과정중，700hPa수기통량변화대강강수락구유흔호적지시작용：예서남적폭우구위우수기통량대치중심부근화전단수기통량등치선밀집대내，예중동부적폭우구위우수기통량대치중심북부수기통량등치선밀집대내、대치중심운동방향적좌측。수기통량산도장상，850hPa수기통량산도적변화여폭우적개시시단화강도유흔호적대응：수기통량산도전위복합、복합층증후위강강수개시적표지，복합량돌연증대표지착강수강도증대。700hPa수직라선도적신속증강여강강수발생시단유교호적대응，강강수산생재수직라선도대치축적동남측。
Using the conventional data and NCEP reanalysis data in Henan on 1--2, August 2011, the paper analyzed the circulation situation, water vapor condition and vertical helicity of the torrential rain. The results showed that： the moving to the northeast nearly to Henan by the southwest vortex is the typical effects. The plateau trough at 500 hPa moves toward to the east, subtropical anticyclone becomes weaker and then stronger, the southwest vortex in the middle-low level moves along with shear line to the northeast. Henan lies in the front and the front left side of southwest low-level jet export, which provide an advantageous dynamic and water vapor condition to the torrential rain event. The water vapor transport at 700 hPa has a very important indication in this rainfall area. The torrential area in southwestern Henan is near the maximal value of vapor flux and in the front of density gradient with it. The torrential area in central and eastern Henan is in the north of density gradient with vapor flux and the left of the direction of its maximal value＇ s movement. The change of vapor flux divergence at 850 hPa and the begin and strength of the rain have more correlation. The vapor flux divergence turns to convergence, and the convergence layer becomes heavy is the symbol of starting of torrential rain, the sudden enlargement of vapor flux divergence meaning the enlargement of the Strength of the rain. The rapidly increasing of vertical helicity at 700 hPa is corresponded to the rain happen time ; the heavy precipitation occurred in the southeast of the vertical helicity maximal value axis.