Adjusted and Homogenized Canadian Climate Data (AHCCD)

This web site provides adjusted and homogenized climate data for many climatological stations in Canada. These data were created for use in climate research including climate change studies. They incorporate a number of adjustments applied to the original station data to address shifts due to changes in instruments and in observing procedures. Sometimes the observations from several stations were joined to generate a long time series.


Users are strongly cautioned to determine the data suitability for their application. They should also be aware that ongoing research on adjustment techniques may result in future revisions of the datasets. The datasets are updated annually with the most recent data.


The adjusted and homogenized data are provided for four climate elements: Surface air temperature, Precipitation, Surface pressure, and Surface wind speed.


References

Mekis, É. and L.A. Vincent, 2011: An overview of the second generation adjusted daily precipitation dataset for trend analysis in Canada. Atmosphere-Ocean, 49(2), 163-177.

Vincent, L. A., M. M. Hartwell, and X. L. Wang, 2020: A third generation of homogenized temperature for trend analysis and monitoring changes in Canada’s climate. Atmosphere-Ocean., 58:3, 173-191, doi:10.1080/07055900.2020.1765728.

Wan, H., X. L. Wang, V. R. Swail, 2010: Homogenization and trend analysis of Canadian near-surface wind speeds. Journal of Climate, 23, 1209-1225.

Wan, H., X. L. Wang, V. R. Swail, 2007: A quality assurance system for Canadian hourly pressure data. J. Appl. Meteor. Climatol., 46, 1804-1817.

Basic view

Metadata Record Information

File Identifier
9c4ebc00-3ea4-4fe0-8bf2-66cfe1cddd1d XML
Date Stamp
2023-04-11T18:38:51
Metadata language

eng; CAN
Character set
UTF8
Hierarchy Level
Series
Author
  Government of Canada; Environment and Climate Change Canada - Environment and Climate Change Canada ( Public inquiries centre )
Fontaine Building 12th floor, 200 Sacré-Coeur Blvd , Gatineau , Quebec , K1A 0H3 , Canada
1-800-668-6767
http://ec.gc.ca
 

Data identification

Date (Publication)
2000-01-01
Date (Creation)
2000-01-01
Status
Completed
Metadata language

eng; CAN
Character set
UTF8
Topic category
  • Climatology, meteorology, atmosphere
Maintenance and Update Frequency
As needed
Spatial representation type
Text, table
Point of contact
  Government of Canada; Environment and Climate Change Canada - Megan Hartwell

Keywords

Theme

  • surface air temperature, precipitation, surface pressure, surface wind speed

ECCC Information Category EN

  • Weather and Climate

Government of Canada Core Subject Thesaurus

  • Climate

  • Climate change

Business Functions

  • Provide Climate Information Products and Services

  • Expand Scientific Knowledge for Climate Monitoring and Prediction

Geography

  • National (CA)

external.theme.EC_Branch

  • Science and Technology Branch

external.theme.EC_Directorate

  • Atmospheric Science and Technology

external.theme.GC_Security_Level

  • Unclassified
 
Use Limitation

Open Government Licence - Canada ( http://open.canada.ca/en/open-government-licence-canada )

Access Constraints
License
Use Constraints
License
Begin Date
1900-01-01
End Date
2012-12-31

Extent

N
S
E
W
thumbnail


 
 

Ref. system Reference Systems

Reference system identifier
/ EPSG:4326 /
 

Distribution

Distribution Formats

Distribution format
  • TXT ( 2 )

 
Distributor
  Government of Canada; Environment and Climate Change Canada - Environment and Climate Change Canada ( Public inquiries centre )
Fontaine Building 12th floor, 200 Sacré-Coeur Blvd , Gatineau , Quebec , K1A 0H3 , Canada
1-800-668-6767
http://ec.gc.ca
 
 

Overviews

N
S
E
W
thumbnail


Keywords

surface air temperature, precipitation, surface pressure, surface wind speed
Business Functions
Expand Scientific Knowledge for Climate Monitoring and Prediction Provide Climate Information Products and Services
ECCC Information Category EN
Weather and Climate
Government of Canada Core Subject Thesaurus
Climate Climate change
external.theme.EC_Branch
Science and Technology Branch
external.theme.EC_Directorate
Atmospheric Science and Technology
external.theme.GC_Security_Level
Unclassified

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