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Found 10 records similar to Standardized Precipitation Evapotranspiration Index (SPEI)

Federal

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.

Last Updated: Dec. 2, 2021
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST GeoTIF
Keywords:  SPI, agclimate, Farmlands, Crops, Agriculture, Temperature, Precipitation
Federal

Drought projections on seasonal to annual time scales are presented for Canada over the twenty-first century, based on the Standardized Precipitation Evapotranspiration Index (SPEI). Results make use of bias-corrected temperature and precipitation projections from 29 global climate models participating in the Coupled Model Intercomparison Project Phase 5 (CMIP5), and include three different forcing scenarios (RCP2.6, RCP4.5 and RCP8.5). Large differences in projected drought changes are observed among different regions. On the annual time scale, southwestern Canada and the Prairies may experience an increase in drying under a warmer climate.

Last Updated: Apr. 18, 2019
Date Published: Dec. 4, 2018
Organization: Environment and Climate Change Canada
Formats: PDF HTML NetCDF
Keywords:  Drought, Climate change, Climate, Climatology, meteorology, atmosphere, Weather and Climate
Federal

Persistent, large-area droughts are among Canada’s costliest natural disasters, having major impacts on sectors such as agriculture, industry, forestry, recreation, human health and society, and ecosystems. This dataset provides 50 km gridded, 12-month Standardized Precipitation Evapotranspiration Index (SPEI) values across land regions of Canada. Over southern areas of the country (south of 60°N) data are from 1900-2011 while in northern areas, the time period is shorter (approximately 1950-2011). The SPEI is a commonly used drought index, which evaluates the deviation of moisture deficit calculated as the difference between precipitation and potential evapotranspiration, the latter determined by temperature.

Last Updated: Jul. 23, 2021
Date Published: Oct. 24, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Drought, Exessive Moisture, Canada, Time Series, Temperature, Precipitation, gridding, interpolation, Drought
Provincial

The Standardized Precipitation Index (SPI) was generated for certain Environment Canada long-term climate stations in Ontario. The SPI quantifies the precipitation deficit and surplus for multiple time scales , including: * one month * three months * six months * nine months * 12 months * 24 months You can use the SPI to study the impact of dry and wet weather conditions to create comprehensive water management approaches. The SPI data package is distributed as a Microsoft Access Geodatabase. This is a legacy dataset that we no longer maintain or support. The documents referenced in this record may contain URLs (links) that were valid when published, but now link to sites or pages that no longer exist.

Last Updated: Dec. 9, 2020
Date Published: Oct. 20, 2020
Organization: Government of Ontario
Formats: HTML ZIP
Keywords:  Données Ontario, Government information
Federal

This application allows you to view current and historical maps of agro-climatic conditions in Canada.

The AAFC Agroclimate data can be acquired from:

Precipitation
Accumulated
Percent of Average
Departure from Average
Percentiles
Temperature
Maximum
Minimum
Crop (Corn) Heat Units
Growing Degree Days

Datasets Used

Last Updated: Jan. 13, 2020
Date Published: Oct. 1, 2019
Organization: Agriculture and Agri-Food Canada
Formats: HTML
Keywords:  Farmlands, precipitation, temperature, crops, agriculture
Federal

The term "Palmer Drought Index" has been used collectively to represent multiple indices. This index is simply a water balance model which analyzes precipitation and temperature, and used as a tool to measure meteorological and hydrological drought across space and time. All versions of the index uses the Versatile Soil Moisture Budget to model the movement of water within the system, and a daily Priestly-Taylor model to estimate evapotranspiration. The Palmer Drought Index (PDI) uses monthly temperature and precipitation data to calculate a simple soil water balance.

Last Updated: Dec. 2, 2021
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST GeoTIF
Keywords:  PDI, agclimate, PHDI, Farmlands, Agriculture, Crops, Temperature, Precipitation
Federal

The term "Palmer Drought Index" has been used collectively to represent multiple indices. This index is simply a water balance model which analyzes precipitation and temperature, and used as a tool to measure meteorological and hydrological drought across space and time. All versions of the index uses the Versatile Soil Moisture Budget to model the movement of water within the system, and a daily Priestly-Taylor model to estimate evapotranspiration. The Palmer Drought Index (PDI) uses monthly temperature and precipitation data to calculate a simple soil water balance.

Last Updated: Dec. 2, 2021
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST GeoTIF
Keywords:  PDI, agclimate, PMDI, Agriculture, Crops, Farmlands, Temperature, Precipitation
Federal

Precipitation Percentiles represents the accumulated precipitation (mm) for the time period compared to historical information for the same time period. This comparison ranks the current precipitation amount and assigns it a percentile value based on a historic record.

Products are produced for the following timeframes: Agricultural Year, Growing Season and Winter Season as well as rolling products for 30, 60, 90 and 180 days

Last Updated: Dec. 2, 2021
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML GeoTIF ESRI REST
Keywords:  PE, agclimate, Agriculture, Crops, Farmlands, Precipitation, Temperature
Federal

This data represents the dryness of the land surface based on vegetation conditions. The data is created weekly and uses weekly information on precipitation anomalies (namely the Standardized Precipitation Index or SPI) and satellite vegetation condition derived from Normalized Difference Vegetation Index (NDVI) from the MODIS Satellite. These dynamic data sets along with static data sets on land cover, soil water holding capacity, irrigation, ecozones and land surface elevation are used to model the drought severity, based on the Palmer Drought Severity Index (PDSI). The mapcubist model was trained on historical data and applied in real time to the dynamic inputs to produce drought severity ratings.

Last Updated: Nov. 17, 2021
Date Published: Sep. 8, 2020
Organization: Agriculture and Agri-Food Canada
Formats: WMS TIFF ESRI REST PDF
Keywords:  Crops, Farmlands, Precipitation, Agriculture
Federal

Departure from Average Precipitation represents the accumulated precipitation value for a location, subtracted by the long term average value. The long term average value is defined as the average amount over the 1981 – 2010 period. A negative value indicates that the location has received less than the normal amount of precipitation (mm) for that timeframe. A positive value indicates that the location has received more than the normal amount of precipitation (mm).

Last Updated: Dec. 2, 2021
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML GeoTIF ESRI REST
Keywords:  agclimate, DNP, Farmlands, Crops, Agriculture, Precipitation
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