Standardized Precipitation Index (SPI)

The Standardized Precipitation Index (SPI) has been recognized as the most accessible index for quantifying and reporting meteorological drought. On short timescales, the SPI is closely related to soil moisture, while at longer timescales, the SPI can be related to groundwater and reservoir storage. The model uses observed historical precipitation amounts to compute probability distributions which are then normalized using an incomplete gamma function over a range of timescales. The values can be interpreted as the number of standard deviations by which the observed anomaly deviates from the long-term mean. where positive values (greater than zero) result from above average conditions.

Simple

Date ( RI_367 )
2017-05-05
Date ( RI_366 )
2017-05-05
RI_414
  Government of Canada; Agriculture and Agri-Food Canada; Science and Technology Branch
Canada
https://agriculture.canada.ca
RI_412
  Government of Canada; Agriculture and Agri-Food Canada; Science and Technology Branch
Canada
https://agriculture.canada.ca/
Presentation form
mapDigital;carteNumérique RI_391
Status
completed; complété RI_593
Maintenance and update frequency
asNeeded; auBesoin RI_540
Keywords ( RI_529 )
  • SPI
  • agclimate
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Precipitation
  • Crops
  • Farmlands
  • Temperature
  • Agriculture
Use limitation
Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)
Access constraints
license; licence RI_606
Use constraints
license; licence RI_606
Spatial representation type
vector; vecteur RI_635
Spatial representation type
grid; grille RI_636
Metadata language
eng; CAN
Topic category
  • Climatology, meteorology, atmosphere
Begin date
2012-09-03
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Reference system identifier
http://www.epsg.org/ / EPSG:3857 / 8.3.4
RI_414
  Government of Canada; Agriculture and Agri-Food Canada; Science and Technology Branch
Canada
https://agriculture.canada.ca
OnLine resource
Data Product Specification (English) ( HTTPS )

Supporting Document;PDF;eng

OnLine resource
Using AAFC Climate Services (French) ( HTTPS )

Supporting Document;PDF;fra

OnLine resource
Data Product Specification (French) ( HTTPS )

Supporting Document;PDF;fra

OnLine resource
Agroclimate Interactive Maps (English) ( HTTPS )

Application;HTML;eng

OnLine resource
Agroclimate Interactive Maps (French) ( HTTPS )

Application;HTML;fra

OnLine resource
Pre-packaged GeoTIF files (No linguistic component) ( HTTPS )

Dataset;GeoTIF;zxx

OnLine resource
Using AAFC Climate Services (English) ( HTTPS )

Supporting Document;PDF;eng

OnLine resource
Standardized Precipitation Index (SPI) ( ESRI REST: Image Service )

Web Service;ESRI REST;zxx

OnLine resource
Standardized Precipitation Index (SPI) ( HTTPS )

Web Service;WMS;zxx

OnLine resource
Standardized Precipitation Index (SPI) ( ESRI REST: Image Service )

Web Service;ESRI REST;zxx

File identifier
4ae5b0d1-b811-4238-9aed-ce97363f51eb XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Hierarchy level
series; série RI_623
Date stamp
2024-08-12T13:43:22
Metadata standard name
North American Profile of ISO 19115:2003 - Geographic information - Metadata
Metadata standard version
CAN/CGSB-171.100-2009
RI_414
  Government of Canada; Agriculture and Agri-Food Canada; Science and Technology Branch
Canada
https://agriculture.canada.ca
 
 

Overviews

overview

Spatial extent

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Keywords


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