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基于拉格朗日方法的一次南疆西部特大暴雨水汽来源分析
牟欢1,2(), 赵丽3, 王旭4(), 安大维1,2
Water vapor source analysis of a severe torrential rain in the west of southern Xinjiang based on the Lagrangian Method
Huan MOU1,2(), Li ZHAO3, Xu WANG4(), Dawei AN1,2

图3. 2018年5月300 hPa流函数异常(等值线,106 m2·s-1)和波作用通量(矢量,m2·s-2): 阴影表示气候平均4—6月纬向西风大值带(m·s-1);紫色实线表示地形高度大于1 500 m地区;打点区表示通过99.5%显著性检验的流函数异常区域(2018年5月与1981—2010年5月)

Fig.3. Horizontal distribution of anomalous stream function (contours, 106 m2·s-1) and wave activity flux (vectors, m2·s-2) in May 2018: gray shading indicating the large value belt of climate-mean westerly wind in April-May-June (m·s-1); while solid purple line area indicating the area higher than 1 500 m a.s.l., dot area representing an outlier region of a flow function that passes the 99.5% significance test (May 2018 and May 1981—2010)