陇东黄土高原旱区短时强降水的时空分布特征及地形影响研究
杨丽杰, 曹彦超, 刘维成, 徐丽丽, 张洪芬, 孙子茱

Research on spatio-temporal distribution characteristics of short-term heavy rainfall and terrain influence in the Loess Plateau arid region of eastern Gansu
YANG Lijie, CAO Yanchao, LIU Weicheng, XU Lili, ZHANG Hongfen, SUN Zizhu
图7 2021年8月18—19日极端强降水期间短时强降水次数和雨量极值逐时变化(a)、次数空间分布(b)和18日21:00(c)、19日03:00(d)地面风场(风矢,单位:m·s-1)及辐合线(蓝色线)(彩色填充区为海拔高度,单位:m)以及18日16:00(e)、19日00:00(f)沿35.6°N的假相当位温(彩色填充区,单位:K)纬向垂直剖面(黑色阴影为地形)
Fig.7 The hourly evolutions of times and precipitation extremum (a) and the spatial distribution of times (b) of short-term heavy rainfall during the extremely strong precipitation process from 18 to 19 August, the surface wind field (wind vectors, Unit: m·s-1) and convergence lines (blue lines)(the color shaded for elevation, Unit: m) at 21:00 BST 18 August (c) and 03:00 BST 19 August (d), and the zonal vertical section of pseudo-equivalent potential temperature (the color shaded, Unit: K)(the black shaded for terrain) along 35.6°N at 16:00 BST 18 August (e) and 00:00 BST 19 August (f) 2021