Standardized Precipitation Evapotranspiration Index (SPEI)

The Standardized Precipitation Evapotranspiration Index (SPEI) is computed similarly to the SPI. The main difference is that SPI assesses precipitation variance, while SPEI also considers demand from evapotranspiration which is subtracted from any precipitation accumulation prior to assessment.

Unlike the SPI, the SPEI captures the main impact of increased temperatures on water demand.

Données et ressources

Info additionnelle

Champ Valeur
Dernière modification avril 17, 2026, 21:22 (TU)
Créé le avril 17, 2026, 21:22 (TU)
contact_email agri-geomatics-agrog@agr.gc.ca
contact_person {"en": "Government of Canada; Agriculture and Agri-Food Canada; Science and Technology Branch,agri-geomatics-agrog@agr.gc.ca", "fr": "Gouvernement du Canada; Agriculture et Agroalimentaire Canada; Direction générale de la science et de la technologie,agri-geomatics-agrog@agr.gc.ca"}
criticality_level []
data_dictionary EPSG:3857,http://www.epsg.org/,8.3.4
geographic_scope []
open_canada_collection fgp
open_canada_date_published 2017-05-05 00:00:00
open_canada_keywords {"en": ["SPEI", "agclimate", "Precipitation", "Crops", "Agriculture", "Temperature", "Farmlands"], "fr": ["SPEI", "agclimat", "Précipitation", "Cultures", "Agriculture", "Température", "Terre agricole"]}
open_canada_subject ["nature_and_environment", "science_and_technology"]
sensitivity_level unrestricted
title_fr Indice normalisé précipitations moins évapotranspiration (INPE)
update_frequency as_needed