气象干旱指数在青藏高原东缘高寒草地的适用性评价及2022年干旱监测分析

范浩男, 王玮, 戴昂, 马林飞, 李肖康

Applicability evaluation of meteorological drought index in alpine grassland at the eastern edge of the Qinghai-Xizang Plateau and drought monitoring in 2022

FAN Haonan, WANG Wei, DAI Ang, MA Linfei, LI Xiaokang

表3 PDSI本地化校验前后干旱等级划分

Tab.3 The classification of drought grades based on PDSI before and after localization calibration

类型 PDSI（校验前）阈值区间 PDSIimproved（校验后）阈值区间 无旱 -1.0<PDSI -1.43<PDSIimproved 轻旱 -2.0<PDSI≤-1.0 -2.46<PDSIimproved≤-1.43 中旱 -3.0<PDSI≤-2.0 -3.52<PDSIimproved≤-2.46 重旱 -4.0<PDSI≤-3.0 -4.36<PDSIimproved≤-3.52 特旱 PDSI≤-4.0 PDSIimproved≤-4.36