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.

Data and Resources

Additional Info

Field Value
Source
Version
Author
Author Email
Maintainer
Maintainer Email
Data Level
Agreement Required
Purpose Constraints
Redistribution Allowed
AI Training Allowed
Data Steward
Title (French) Indice normalisé précipitations moins évapotranspiration (INPE)
Update Frequency as_needed
Geographic Scope []
Criticality Level []
Sensitivity Level unrestricted
Language
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"}
Contact Email agri-geomatics-agrog@agr.gc.ca
Data Dictionary EPSG:3857,http://www.epsg.org/,8.3.4
Open Canada Date Published 2017-05-05 00:00:00
Open Canada Date Modified
Open Canada Subject ["nature_and_environment", "science_and_technology"]
Open Canada Keywords {"en": ["SPEI", "agclimate", "Precipitation", "Crops", "Agriculture", "Temperature", "Farmlands"], "fr": ["SPEI", "agclimat", "Précipitation", "Cultures", "Agriculture", "Température", "Terre agricole"]}
Open Canada Collection fgp
Principal Organization
Reference Data
Official Source