Description

Growing Degree Days (GDDs) are used to estimate the growth and development of plants and insects during the growing season. Insect and plant development are very dependent on temperature and the daily accumulation of heat. The amount of heat required to move a plant or pest to the next development stage remains constant from year to year. However, the actual amount of time (days) can vary considerably from year to year because of weather conditions. Base temperatures are a point below which development does not occur for the organism in question. Base 5 temperatures are commonly used for alfalfa, canola and general plant growth. These values are calculated across Canada in 10x10 km cells.

Resources

Name	Format	Description	Link
Climate normals interactive maps	HTML		https://agriculture.canada.ca/atlas/cartes-interactives-normales-climatiques
Climate normals interactive maps	HTML		https://agriculture.canada.ca/atlas/climate-normals-interactive-maps
Using AAFC Climate Services (English)	PDF		https://agriculture.canada.ca/atlas/data_donnees/agClimate/supportdocument_documentdesupport/en/Using%20AAFC%20Climate%20Services.pdf
Pre-packaged GeoTif files (No linguistic component) annual	Unknown		https://agriculture.canada.ca/atlas/data_donnees/climateNormals/data_donnees/tif/annual/lt_gdd05/
Pre-packaged GeoTif files (No linguistic component) monthly	Unknown		https://agriculture.canada.ca/atlas/data_donnees/climateNormals/data_donnees/tif/monthly/lt_gdd05/
Pre-packaged Maps (English)	PDF		https://agriculture.canada.ca/atlas/data_donnees/climateNormals/maps_cartes/en/lt_gdd05/
Pre-packaged Maps (French)	PDF		https://agriculture.canada.ca/atlas/data_donnees/climateNormals/maps_cartes/fr/lt_gdd05/
Data Product Specification (English)	PDF		https://agriculture.canada.ca/atlas/data_donnees/climateNormals/supportdocument_documentdesupport/en/ISO_19131_30_Year_Climate_Normal_Data_-_Data_Product_Specification.pdf
Data Product Specification (French)	PDF		https://agriculture.canada.ca/atlas/data_donnees/climateNormals/supportdocument_documentdesupport/fr/Donnees_climatiques_normales_derivees_30ans_SPC_ISO_19131.pdf

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