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.
- Publisher - Current Organization Name: Agriculture and Agri-Food Canada
- Licence: Open Government Licence - Canada
Data and Resources
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Data Product Specification (English)PDFEnglish guide PDF
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Using AAFC Climate Services (French)PDFFrench guide PDF
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Data Product Specification (French)PDFFrench guide PDF
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Agroclimate Interactive Maps (English)HTMLEnglish application HTML
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Agroclimate Interactive Maps (French)HTMLFrench application HTML
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Pre-packaged GeoTIF files (No linguistic component)GeoTIFNo linguistic content; Not applicable dataset GeoTIF
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Using AAFC Climate Services (English)PDFEnglish guide PDF
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Standardized Precipitation Evapotranspiration Index (SPEI)ESRI RESTNo linguistic content; Not applicable web_service ESRI REST
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Standardized Precipitation Evapotranspiration Index (SPEI)WMSNo linguistic content; Not applicable web_service WMS
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Standardized Precipitation Evapotranspiration Index (SPEI)ESRI RESTNo linguistic content; Not applicable web_service ESRI REST
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