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.

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Champ	Valeur
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Version
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Agreement Required
Purpose Constraints
Redistribution Allowed
AI Training Allowed
Data Steward
Title (French)	Indice normalisé des précipitations (INP)
Update Frequency	as_needed
Geographic Scope	[]
Criticality Level	[]
Sensitivity Level	unrestricted
Langue
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
Dictionnaire de données	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": ["SPI", "agclimate", "Farmlands", "Precipitation", "Temperature", "Crops", "Agriculture"], "fr": ["SPI", "agclimat", "Terre agricole", "Précipitation", "Température", "Cultures", "Agriculture"]}
Open Canada Collection	fgp
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Official Source