Description

The Homogenized Surface Pressure data consist of monthly, seasonal and annual means of hourly sea level and station pressure (hectopascals) for 626 locations in Canada. Homogenized climate data incorporate adjustments (derived from statistical procedures) to the original station data to account for discontinuities from non-climatic factors, such as instrument changes or station relocation. The time periods of the data vary by location, with the oldest data available from 1953 at some stations to the most recent update in 2014. Data availability over most of the Canadian Arctic is restricted to 1953 to present. The data will continue to be updated every few years (as time permits).

Resources

Name	Format	Description	Link
AHCCD Annual	WFS		https://api.weather.gc.ca/collections/ahccd-annual
AHCCD Annual	WFS		https://api.weather.gc.ca/collections/ahccd-annual?lang=fr
AHCCD Monthly	WFS		https://api.weather.gc.ca/collections/ahccd-monthly
AHCCD Monthly	WFS		https://api.weather.gc.ca/collections/ahccd-monthly?lang=fr
AHCCD Seasonal	WFS		https://api.weather.gc.ca/collections/ahccd-seasonal
AHCCD Seasonal	WFS		https://api.weather.gc.ca/collections/ahccd-seasonal?lang=fr
AHCCD Stations	WFS		https://api.weather.gc.ca/collections/ahccd-stations
AHCCD Stations	WFS		https://api.weather.gc.ca/collections/ahccd-stations?lang=fr
AHCCD Trends	WFS		https://api.weather.gc.ca/collections/ahccd-trends
AHCCD Trends	WFS		https://api.weather.gc.ca/collections/ahccd-trends?lang=fr
Climate Data Extraction Tool	HTML		https://climate-change.canada.ca/climate-data/#/adjusted-station-data
Adjusted / homogenized climate data EN	HTML		https://climate-scenarios.canada.ca/index.php?page=homogenized-data
Climate Data Viewer	HTML		https://climate-viewer.canada.ca/climate-maps.html
View ECCC Data Mart (English)	HTML		https://data-donnees.ec.gc.ca/data/climate/scientificknowledge/adjusted-and-homogenized-canadian-climate-data-ahccd/homogenized-surface-pressure-ahccd/
View ECCC Data Mart (French)	HTML		https://data-donnees.ec.gc.ca/data/climate/scientificknowledge/adjusted-and-homogenized-canadian-climate-data-ahccd/homogenized-surface-pressure-ahccd/?lang=fr
View Data Mart	HTML		https://dd.meteo.gc.ca/climate/ahccd
View Data Mart	HTML		https://dd.weather.gc.ca/climate/ahccd
AHCCD Stations	WMS		https://geo.weather.gc.ca/geomet-climate?lang=fr&service=WMS&version=1.3.0&request=GetCapabilities&layer=AHCCD.STATIONS
AHCCD Stations	WMS		https://geo.weather.gc.ca/geomet-climate?service=WMS&version=1.3.0&request=GetCapabilities&layer=AHCCD.STATIONS
Adjusted / homogenized climate data FR	PDF		https://scenarios-climatiques.canada.ca/index.php?page=homogenized-data
Climate Data Viewer	HTML		https://visualiseur-climatique.canada.ca/cartes-climatiques.html
Data Collection Methodology	HTML		https://www.canada.ca/en/environment-climate-change/services/climate-change/canadian-centre-climate-services/display-download/technical-documentation-adjusted-climate-data.html
Data Collection Methodology	HTML		https://www.canada.ca/fr/environnement-changement-climatique/services/changements-climatiques/centre-canadien-services-climatiques/afficher-telecharger/documentation-technique-donnees-climatiques-ajustees.html

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