CAJ | 학술논문

　　对2003、2007年江淮梅雨期的中尺度对流涡旋（MCV）进行了统计分析，结果表明我国梅雨锋上MCV活跃，这些MCV与强降水有关。2003、2007年江淮梅雨期有9个MCV发生，大多数的MCV发生在32°N～35°N之间的江苏境内。采用ARPS（Advanced Regional Prediction System）的资料分析系统（ADAS）和WRF模式模拟了2个MCV的发展过程，并使用数值模拟结果分析了它们的结构特征。MCV一般发生在强对流系统的北侧，其涡旋环流一般在600 hPa以下，对应涡旋区域对流层高层为强辐散，涡度最强的中心在对流层中层，但正涡度区可伸展到300 hPa。初始阶段MCV的中心为上升运动和中性层结，成熟阶段MCV的中心转为下沉运动，同时其南侧有新的对流发生。发展型和不发展型的MCV对比发现，涡旋对流层高层有涡度增加以及二次对流的潜热释放多，可能是发展型MCV维持时间较长的原因。此外，MCV发展过程中南侧急流的增强对MCV中对流的触发和维持有一定作用。
　　대2003、2007년강회매우기적중척도대류와선（MCV）진행료통계분석，결과표명아국매우봉상MCV활약，저사MCV여강강수유관。2003、2007년강회매우기유9개MCV발생，대다수적MCV발생재32°N～35°N지간적강소경내。채용ARPS（Advanced Regional Prediction System）적자료분석계통（ADAS）화WRF모식모의료2개MCV적발전과정，병사용수치모의결과분석료타문적결구특정。MCV일반발생재강대류계통적북측，기와선배류일반재600 hPa이하，대응와선구역대류층고층위강복산，와도최강적중심재대류층중층，단정와도구가신전도300 hPa。초시계단MCV적중심위상승운동화중성층결，성숙계단MCV적중심전위하침운동，동시기남측유신적대류발생。발전형화불발전형적MCV대비발현，와선대류층고층유와도증가이급이차대류적잠열석방다，가능시발전형MCV유지시간교장적원인。차외，MCV발전과정중남측급류적증강대MCV중대류적촉발화유지유일정작용。
The statistics of mesoscale convective vortices (MCVs) occurring in the Yangtze–Huaihe River basin during the Meiyu period of 2003 and 2007 show that MCVs along the Meiyu front were highly active and could have induced severe flooding. Most of the nine MCVs identified during Meiyu period of 2003 and 2007 were formed at 32°N–35°N near the Jiangsu Province. The WRF (Weather Research and Forecasting) model and the ARPS (Advanced Regional Prediction System) data analysis system (ADAS) are employed to simulate two MCVs, in order to study the development and structure of MCVs. It is determined that MCVs form to the north of convection system with a closed vortex circulation maintained below 600 hPa and a vorticity maximum in the middle troposphere. In addition, positive vorticity could reach 300 hPa. The evolution of MCVs can be divided into three stages:Initiation, maturity, and dissipation. During the initiation stage, an updraft can be found in the center of the MCV with neutral stratification. During the mature stage, a downdraft occurs in the center of the MCV, and secondary convections develop southeast region of the MCV. Compared with undeveloped MCVs, developed MCVs may result from the increase of vorticity in the high-level troposphere and more latent heating from secondary convections. Furthermore, the intensified jet is favorable for the triggering and development of new convections of the MCV.