Table 3 The scPDSI drought category classification.
From: Assessing the Impacts of Drought on Grassland Net Primary Production at the Global Scale
scPDSI value Class | Situation classification |
|---|---|
−0.99 to 0.99 | Normal or wet spell |
−1.99 to −1.00 | Mild drought |
−2.99 to −2.00 | Moderate drought |
−3.99 to −3.00 | Severe drought |
Below −4.00 | Extreme drought |
