Contact Information

  • Address: Instituto Pirenaico de Ecología — CSIC, Avda., Estación Experimental de Aula Dei — CSIC, Av
  • Town: Zaragoza
  • Country: ESP
  • Website:


The 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.

List of Projects

Standardized Preciptation-Evapotranspiration Index of Drought

  • Project Page
  • Project Start Date: 1951-01-01
  • Project End Date: Ongoing