华南“4.21”弓状回波的γ⁃中尺度涡旋雷达观测分析

居圆圆, 徐昕, 唐滢

Radar observation analysis of meso⁃γ⁃scale vortices in bow echo on 21 April in South China

Yuanyuan Ju, Xin Xu, Ying Tang

图5 (a) 05:00，(b) 07:00的对流有效位能(灰色阴影，单位：J·kg-1)，0.1~3 km垂直风切变(箭头)及其大小(等值线，单位：m·s-1)叠加对应的雷达组合反射率(彩色阴影，单位：dBZ)：(a)中蓝色实心三角形代表03:48，04:24，04:36，04:54时刻的中涡旋位置，(b)中蓝色实心三角形代表06:30，06:48，07:00时刻 (b) 0700 UTC： the blue triangles in (a) represent the MV positions at 0348,0424,0436 and 0454 UTC, and the blue triangles in (b) at 0630,0648 and 0700 UTC

Fig.5 Convective available potential energy (gray shading,unit：J·kg-1),0.1~3 km vertical wind shear (vector) and values (contour line,unit：m·s-1),and composite reflectivity (colorful shading,unit：dBZ ) at (a) 0500 UTC and