基于SPEI的近百年天津地区气象干旱时空演变特征

王敏, 尹义星, 陈晓旸, 郭阳, 徐梅, 罗传军

Changing characteristics of meteorological drought in Tianjin for almost one century based on standardized precipitation evapotranspiration index

WANG Min, YIN Yixing, CHEN Xiaoyang, GUO Yang, XU Mei, LUO Chuanjun

表1 基于SPEI干旱等级划分

Tab.1 Classification of drought grades based on SPEI

等级 SPEI值 极旱 ≤-2.0 重旱 (-2.0,-1.5] 中旱 (-1.5,-1.0] 轻旱 (-1.0,-0.5] 无旱 >-0.5