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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: May 4, 2022
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: Feb. 21, 2022
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
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: May 4, 2022
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: May 4, 2022
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: May 4, 2022
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

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: May 4, 2022
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
Federal

Accumulated Precipitation represents the amount of total precipitation in mm (solid and/or liquid) which has been recorded over a given period of time.

Products are produced for the following timeframes: Agricultural Year, Growing Season, Winter Season, as well as rolling products for 7, 14, 30, 60, 90, 180, 270, 365, 730, 1095, 1460 and 1825 days.

Last Updated: May 4, 2022
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML GeoTIF ESRI REST
Keywords:  AC, agclimate, Farmlands, Agriculture, Crops, Precipitation
Federal

Percent of Average Precipitation represents the accumulation of precipitation for a location, divided by the long term average value. The long term average value is defined as the average amount over the 1981 – 2010 period. Products are produced for the following timeframes: Agricultural Year, Growing Season, Winter Season, as well as rolling products for 30, 60, 90, 180, 270, 365, 730, 1095, 1460 and 1825 days.

Last Updated: May 4, 2022
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST GeoTIF
Keywords:  agclimate, AV, Farmlands, Temperature, Precipitation, Agriculture, Crops
Federal

The Versatile Soil Moisture Budget (VSMB) is a soil water budget model that is continuous and deterministic in nature and was developed by AAFC. It is based on the premise that the water available for plant growth is gained by precipitation or irrigation, and lost through evapotranspiration and runoff as well as lateral and deep drainage. The daily net loss or gain is added or subtracted from the water already present in the rooting zone. Water is withdrawn simultaneously, but at different rates, from different soil depths, depending on the potential evapotranspiration, the stage of crop development, the water release characteristics of each soil layer and the available water.

Last Updated: Jul. 27, 2021
Date Published: May 5, 2017
Organization: Agriculture and Agri-Food Canada
Formats: WMS PDF HTML ESRI REST TIFF
Keywords:  Soil Moisture, Farmlands, Crops, Agriculture, Temperature, Precipitation
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