湖南2022/2023年夏秋冬季持续极端干旱事件特征及成因分析

谢傲, 罗伯良, 邓剑波, 高霞霞

Characteristics and cause analysis of extreme and persistent drought in summer, autumn and winter in 2022/2023 in Hunan Province

XIE Ao, LUO Boliang, DENG Jianbo, GAO Xiaxia

表1 基于SPI的气象干旱等级划分

Tab.1 Classification of meteorological drought grade based on SPI

干旱等级 干旱类型 SPI 1 无旱 -0.5<SPI 2 轻旱 -1.0<SPI≤-0.5 3 中旱 -1.5<SPI≤-1.0 4 重旱 -2.0<SPI≤-1.5 5 特旱 SPI≤-2.0