基于倾斜旋转T模态主成分分析的沙颍河流域短时强降水环流分型研究

武威, 徐丽娜, 单铁良

Classification of short-term heavy rainfall circulation patterns in the Shaying River Basin using obliquely rotated T-mode principal component analysis

WU Wei, XU Lina, SHAN Tieliang

图2 槽前西南气流型（a、f）、副高外围西南气流型（b、g）、西北气流型（c、h）、低涡切变型（d、i）及台风低压型（e、j）短时强降水700 hPa位势高度场（等值线，单位：dagpm）与风场（风矢量，单位：m·s-1）的合成场（a、b、c、d、e）及降水概率（单位：%）（f、g、h、i、j）分布 （黑色线范围为沙颍河流域）

Fig.2 Composite fields of 700 hPa geopotential height field (contour lines, Unit: dagpm) and wind field (vectors, Unit: m·s-1) (a, b, c, d, e), and spatial distribution of probability (Unit: %) (f, g, h, i, j) for the short-time heavy precipitation of the pre-trough southwesterly flow pattern (a, f), the southwesterly flow pattern on the periphery of the subtropical high (b, g), the northwesterly flow pattern (c, h), the low vortex shear pattern (d, i), and the typhoon low pressure pattern (e, j) (The area outlined by the black line represents the Shaying River Basin)