基于逐日SPEI-30的黄土高原干旱演变特征及其驱动因素
刘旺旺, 刘丹, 张瑾彤, 李淑萍, 史利洁

Drought evolution characteristics and driving factors on the Loess Plateau based on daily SPEI-30
LIU Wangwang, LIU Dan, ZHANG Jintong, LI Shuping, SHI Lijie
图6 黄土高原不同时段不同季节干旱频次多年平均空间分布(单位:次)
Fig.6 Spatial distribution of multi-year average drought frequencies for different periods and seasons over the Loess Plateau (Unit: times)