The Standardized Precipitation-Evapotranspiration Index (SPEI) is a multiscalar drought index based on climatic data. It can be used for determining the onset, duration and magnitude of drought conditions with respect to normal conditions in a variety of natural and managed systems such as crops, ecosystems, rivers, water resources, etc.
To monitor patterns of drought on a regional scale over time.
Downloadable: 2 datasetsSee the full list of available data
Status - Active
Start date: 1951-01-01