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12 2017年8月5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（阴影为不小于12 g·kg-1的比湿区）和水平风与垂直速度（放大100倍）合成的流线（b）过图3（d）中线段（切变线）的垂直剖面，相对湿度（阴影为不小于60%的湿度区）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123.3°E的纬度-高度剖面 （横坐标上△为董铧炉站、□为同兴站，粗线段为暴雨区）

Fig.12 Vertical cross-sections along the line in fig.3(d) （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 for specific humidity≥12 g·kg-1) and streamline of horizontal wind with vertical velocity (enlarged by 100 times) (b), the latitude-height cross sections along 123.3°E for relative humidity (the shaded areas for relative humidity≥60%) 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 5 August 2017 (△ denotes Donghualu Station, □ denotes Tongxing Station, and bold regions on the abscissa indicate the range of heavy precipitation)