Standardized Precipitation Evapotranspiration Index (SPEI)

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. 2022-05-04 Agriculture and Agri-Food Canada agri-geomatics-agrog@agr.gc.ca Nature and EnvironmentScience and TechnologySPEIagclimateAgricultureCropsFarmlandsTemperaturePrecipitation Data Product Specification (English)PDF https://agriculture.canada.ca/atlas/supportdocument_documentdesupport/aafcAgClimate/en/ISO_19131_AgClimate_-_Data_Product_Specification.pdf Using AAFC Climate Services (French)PDF https://agriculture.canada.ca/atlas/supportdocument_documentdesupport/aafcAgClimate/fr/Utilisation_des_services_climatiques_dAAC.pdf Data Product Specification (French)PDF https://agriculture.canada.ca/atlas/supportdocument_documentdesupport/aafcAgClimate/fr/Donnees_agroclimat_-_SPC.pdf Agroclimate Interactive Maps (English)HTML https://agriculture.canada.ca/atlas/agclimate Agroclimate Interactive Maps (French)HTML https://agriculture.canada.ca/atlas/agclimat Pre-packaged GeoTIF files (No linguistic component)GeoTIF https://agriculture.canada.ca/atlas/data_donnees/cli/agClimate/tif/spei/ Using AAFC Climate Services (English)PDF https://agriculture.canada.ca/atlas/supportdocument_documentdesupport/aafcAgClimate/en/Using_AAFC_Climate_Services.pdf Standardized Precipitation Evapotranspiration Index (SPEI)ESRI REST https://agriculture.canada.ca/atlas/rest/services/app_agclimate_agclimat/agclimate_spei/ImageServer Standardized Precipitation Evapotranspiration Index (SPEI)WMS https://agriculture.canada.ca/atlas/services/app_agclimate_agclimat/agclimate_spei/ImageServer/WMSServer?request=GetCapabilities&service=WMS Standardized Precipitation Evapotranspiration Index (SPEI)ESRI REST https://agriculture.canada.ca/atlas/rest/services/app_agclimate_agclimat/agclimate_spei/ImageServer

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.

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Country: Canada

Electronic Mail Address: agri-geomatics-agrog@agr.gc.ca

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