辽东半岛一次大暴雨过程触发和维持机制分析

梁军, 贾旭轩, 张胜军, 冯呈呈, 李婷婷, 程航, 刘晓初

Diagnostic analysis of trigger and maintenance mechanism associated with a rainstorm over Liaodong Peninsula

LIANG Jun, JIA Xuxuan, ZHANG Shengjun, FENG Chengcheng, LI Tingting, CHENG Hang, LIU Xiaochu

图9 2017年8月4日02：00水平风场（风矢，单位：m·s-1）、正涡度（实线）和散度（阴影为辐合区域）（单位：10-5s-1）（a），垂直速度（虚线，单位：Pa·s-1）、比湿（阴影，单位：g·kg-1）和水平风与垂直速度（放大100倍）合成的流线（b）过图3（b）中线段（切变线）的垂直剖面，相对湿度（阴影，单位：%）和温度露点差（实线，单位：℃）（c）与相当位温（实线，单位：K）和温度平流（阴影，单位：10-4℃·s-1）（d）沿123.1°E的纬度-高度剖面 （横坐标上○为沙河站、▲为塔岭站、■为石灰窑站，粗线段为暴雨区，下同）

Fig.9 Vertical cross-sections along the line in fig.3 (b) （the shear line) for wind field (wind vectors, Unit: m·s-1), positive vorticity (solid lines) and divergence (the shaded areas for convergence areas) （Unit: 10-5s-1) (a)， for vertical speed （dotted lines, Unit: Pa· s-1)， specific humidity (the shaded areas， Unit: g·kg-1) and streamline of horizontal wind with vertical velocity (enlarged by 100 times) (b), the latitude-height cross sections along 123.1°E for relative humidity (the shaded areas， Unit: %) and the difference between temperature and dew-point (solid lines, Unit: ℃) (c)， for equivalent potential temperature (solid lines, Unit: K) and temperature advection (the shaded, Unit: 10-4 ℃·s-1) (d) at 02:00 on 4 August 2017 (○ denotes Shahekou Station， ▲ denotes Taling Station， ■ denotes Shihuiyao Station, and bold regions on the abscissa indicate the range of heavy precipitation，the same as below)