Data Set ID: 

Active Layer Monitoring, Arctic and Subarctic Canada, Version 6

This project involves measuring regional and site variability in maximum annual active layer development and vertical surface movement over permafrost, and monitoring sites over time in order to observe trends. The project records maximum thaw penetration, maximum heave and subsidence, late season snow depths, current depth of thaw, elevation, and soil properties. Some sites are twinned with soil- and air-temperature recording equipment.

The project includes about 60 monitoring stations extending from Fort Simpson, Canada, in the upper Mackenzie River valley to the Beaufort Sea coast at North Head, Richards Island, Canada. Ten of the sites are part of the IPA's Circumpolar Active Layer Monitoring (CALM) Program. CALM site numbers are in parentheses after the site names: North Head (C3), Taglu (C4), Lousy Point (C5), Reindeer Depot (C7), Rengleng River (C8), Mountain River (C9), Norman Wells (C11), Ochre River (C13), Willowlake River (C14), and Fort Simpson (C15). See the CALM Program Web page for geographic coordinates and site history for all CALM sites.

These data are the property of the people of Canada and the responsibility of the Geological Survey of Canada. If published, adequate acknowledgment is expected. Please contact F. M. Nixon regarding use of the data set or access to the extended data.

This is the most recent version of these data.

BASIC Level of Service

Data: Data integrity verified

Documentation: Key metadata and links to supporting documentation available

User Support: Assistance with data access and basic data usage

See All Level of Service Details

  • Frozen Ground > Active Layer > ACTIVE LAYER
  • Snow/Ice > Freeze/Thaw > FREEZE/THAW
  • Frozen Ground > Periglacial Processes > PERIGLACIAL PROCESSES
  • Snow/Ice > Permafrost > PERMAFROST
  • Frozen Ground > Permafrost > PERMAFROST
  • Soils > Permafrost > PERMAFROST
  • Snow/Ice > Snow Depth > SNOW DEPTH
  • Soils > Soil Moisture/Water Content > SOIL MOISTURE/WATER CONTENT
Data Format(s):
Spatial Coverage:
N: 69.717, 
S: 61.883, 
E: -121.6, 
W: -134.95
Platform(s):Not specified
Spatial Resolution:Not SpecifiedSensor(s):Not specified
Temporal Coverage:
  • 1 January 1991 to 31 December 2007
(updated January 2009)
Temporal ResolutionNot specifiedMetadata XML:View Metadata Record
Data Contributor(s):F. Mark Nixon, R. Mackay

Geographic Coverage

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As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Nixon, F. Mark 2003, updated January 2009. Active Layer Monitoring, Arctic and Subarctic Canada, Version 6. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: [Date Accessed].

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