Permafrost and the shallow thermal regime at Alert, N.W.T.

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ConferenceRoger J.E. Brown Memorial Volume. Proceedings Fourth Canadian Permafrost Conf.: 02 March 1981, Calgary, Alberta, Canada
Pages1222; # of pages: 11
SubjectPermafrost; Soils; seasons; temperature; cold regions; northwest territories, canada; terrain analysis; ground temperatures
AbstractIn 1978, a shallow permafrost and terrain analysis study was started at Canadian Forces Station Alert, N.W.T. (82 degrees 30 minutes N, 62 degrees 26 minutes W). Five holes, drilled to depths down to 60 m, were instrumented with multi- thermistor cables, and temperature measurements have been taken every two or three weeks for the last three years by DND personnel. The drilling sites were chosen to cover various terrain types accessible from the Alert station. Preliminary air photo analysis indicates that the principal landforms are of glacial and marine origin. A 60 m temperature cable (site 1), installed within 100 m of a shore-line emerging due to glacial unloading, yields temperatures 4 to 5 K warmer than two similar cables installed on inland plateau sites (sites 2 and 3). An analysis of these three sites suggests the higher subsurface temperatures at the shore site result as much from its proximity to the sea as from the period of submergence prior to 3000 years ago. Temperature cables installed in two 15 m holes (sites 4 and 5) on gentle north- and south-facing slopes have shown that aspect has little influence on temperatures at this extreme latitude.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number20806
NPARC number20375130
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Record identifier06c0c1c7-ceb7-485a-8c84-466b1b700e54
Record created2012-07-23
Record modified2016-05-09
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