CAJ | 학술논문

运用实况自动站、高时空分辨率的雷达和数值模拟资料，对2009年7月24日的梅雨锋暴雨过程进行了分析，结果表明：（1）锋面南侧的暖区弱降水环境内，近地面的风场会有扰动涡旋出现，随着扰动涡旋趋于稳定和向上发展，降水迅速加强，形成短时暴雨，并伴随有大风出现。（2）偏西气流从边界层开始发展并加强为急流，在向东推进的过程中逐渐抬升，形成了一支从边界层倾斜入对流层低层的急流轴；而偏南气流与偏北风相遇之后，不仅形成风向的辐合和切变，而且在空间上被抬升，形成了一支斜升入流。（3）在近地面风场的切变和辐合作用下，锋生与辐合同步加强，边界层内的涡度也逐渐增强，由此带动了扰动的发生发展，扰动涡旋在边界层内率先形成，随后，在急流的东传和抬升影响下，扰动涡旋也逐步向东移动、向上发展。（4）近地面风速的加强、风向的辐合切变导致了扰动涡旋的发生和形成，并逐渐发展，这是边界层中尺度扰动涡旋发生发展的动力因子。
운용실황자동참、고시공분변솔적뢰체화수치모의자료，대2009년7월24일적매우봉폭우과정진행료분석，결과표명：（1）봉면남측적난구약강수배경내，근지면적풍장회유우동와선출현，수착우동와선추우은정화향상발전，강수신속가강，형성단시폭우，병반수유대풍출현。（2）편서기류종변계층개시발전병가강위급류，재향동추진적과정중축점태승，형성료일지종변계층경사입대류층저층적급류축；이편남기류여편북풍상우지후，불부형성풍향적복합화절변，이차재공간상피태승，형성료일지사승입류。（3）재근지면풍장적절변화복합작용하，봉생여복합동보가강，변계층내적와도야축점증강，유차대동료우동적발생발전，우동와선재변계층내솔선형성，수후，재급류적동전화태승영향하，우동와선야축보향동이동、향상발전。（4）근지면풍속적가강、풍향적복합절변도치료우동와선적발생화형성，병축점발전，저시변계층중척도우동와선발생발전적동력인자。
The heavy rainfall event along the Meiyu front on June 24, 2009 was analyzed using data from auto weather stations, high resolution radars, and simulations. The results show that several surface disturbance vortexes formed after the weak rainfall in the southern warm section of the Meiyu front. With the stabilizing and upward development of the disturbance vortex, a short duration rainstorm accompanied by gale occurred. After the strengthening and lifting of the westerly wind, a westerly jet formed with the jet axis between the planetary boundary layer and the low troposphere. Convergence and shear occurred after the southerly flow encountered the northerly wind. The southerly flow could have turned into convection through lifting by northerly wind. The vorticity of the planetary boundary layer increased gradually followed by synchronous enhancement of frontogenesis and convergence under the influence of surface shear and convergence. Then, the disturbance vortex could form and develop in the planetary boundary layer below the troposphere. The intensification of wind speed, shear, and convergence near the surface were the dynamic factors responsible for the formation of the mesoscale disturbance vortex.