CAJ | 학술논문

利用武汉站风廓线雷达和地基微波辐射计获取的高时空分辨率资料,结合雷达回波和地面自动站加密观测资料,分析了2011年6月9日武汉短时强降水过程的中尺度对流系统。结果表明：引起短时强降水的是一个尾随层云类中尺度对流系统。降水开始前15 min,对流层中低层有显著倾斜上升气流,并在其前后形成两个小尺度涡旋,与冷池和风切变抗衡下新单体的生成模型相一致。强降水开始前,地面气压迅速降低,地面风速迅速增大,云底高度波动降低;降水发生后,成熟单体前部边界层和高层为相对＂对流线＂前进方向由后向前的水平运动,对流层低层为由前向后的水平运动,成熟单体后部边界层、对流层低层和高层为相对＂对流线＂由前向后的水平运动,中层为由后向前的水平运动,这些特征与线状中尺度对流系统成熟阶段模型相符。
이용무한참풍곽선뢰체화지기미파복사계획취적고시공분변솔자료,결합뢰체회파화지면자동참가밀관측자료,분석료2011년6월9일무한단시강강수과정적중척도대류계통。결과표명：인기단시강강수적시일개미수층운류중척도대류계통。강수개시전15 min,대류층중저층유현저경사상승기류,병재기전후형성량개소척도와선,여랭지화풍절변항형하신단체적생성모형상일치。강강수개시전,지면기압신속강저,지면풍속신속증대,운저고도파동강저;강수발생후,성숙단체전부변계층화고층위상대＂대류선＂전진방향유후향전적수평운동,대류층저층위유전향후적수평운동,성숙단체후부변계층、대류층저층화고층위상대＂대류선＂유전향후적수평운동,중층위유후향전적수평운동,저사특정여선상중척도대류계통성숙계단모형상부。
The mesoscale convective system in a short-term severe precipitation process in Wuhan on 9 June 2011 was analyzed by using the observation data with high spatial and temporal resolution from wind profiler radar and ground-based microwave radiometer,radar echo data and surface automatic weather observations.The results show that this short-term severe precipitation was caused by a linear trailing stratiform mesoscale convective system(TS MCS).Fifteen min before the precipitation happening,strong tilting updraft occurred in the mid-and low-level and formed two small scale vertical vortices in front and at back of it.This characteristic conformed to the new cell generation model in balance between cool pool and wind shear.Before the severe precipitation occurred the surface air pressure rapidly fell,wind speed suddenly increased and,cloud base fluctuated in a drop process.After the severe precipitation occurred,in the front part of MCS the airflows moved from back to front relative to the"convection line"movement in boundary layer and high level of the troposphere,and moved from front to back in low level.In the back part of MCS the airflows moved from front to back in boundary layer,low and high levels of the troposphere,and moved from back to front in middle level.These airflow characteristics conformed to mature stage model of linear mesoscale convective system.