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3 雷达组合反射率(阴影，单位：dBZ)，径向速度(等值线，间隔5 m·s-1)及中涡旋(绿色实心三角形)位置分布图: (a) 03:48，(b) 04:24代表北侧;(c) 03:24，(d) 06:18代表中间

Fig.3 Radar composite reflectivity (shading,unit：dBZ),radial velocity (contours，interval 5 m·s-1) and MV (green solid triangle) locations at (a) 0348 UTC and (b) 0424 UTC in the north of the QLCS, (c) 0324 UTC and (d) 0618 UTC in the middle The solid lines of the contour represent positive values (away from the radar),and the dashed lines represents negative values (towards the radar). The value of radial velocity equal to 5 m·s-1 is in blue,and greater than 5 m·s-1 in red