新疆气候“湿干转折”的信号和影响探讨

姚俊强, 毛炜峄, 陈静, 迪丽努尔·托列吾别克

Signal and impact of wet-to-dry shift over Xinjiang, China

YAO Junqiang, MAO Weiyi, CHEN Jing, DILINUER Tuoliewubieke

表1 SPEI干湿等级划分表

Tab. 1 Drought and wetness classifications of SPEI

类型 SPEI值 极端湿润 SPEI ≥ 2 中等湿润 1.5 ≤ SPEI < 1.99 轻度湿润 1 ≤ SPEI < 1.49 正常 -0.99 < SPEI < 0.99 轻度干旱 -1.49 < SPEI ≤ -1 中等干旱 -1.99 < SPEI ≤ -1.5 极端干旱 SPEI ≤ -2