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(Article of periodic en Anglais - 2010)

Document title

Interannual changes in seasonal ground freezing and near-surface heat flow beneath bottom-fast ice in the near-shore zone, Mackenzie Delta, NWT, Canada

Authors(s) and Affiliation(s)

STEVENS C.W. (1) ; MOORMAN B.J. (2) ; SOLOMON S.M. (3) ;
(1) Dep. of Geosciences, univ., Calgary, CANADA
(2) Dep. of Geography, Univ., Calgary, CANADA
(3) Geological Survey of Canada (Atlantic), Natural resources, Dartmouth, CANADA

Abstract

Interannual changes in seasonal ground freezing and near-surface heat flow beneath zones of bottom-fast ice (BFI) were examined over the winters of 2005–06 and 2006–07 within the near-shore zone of the Mackenzie Delta. Winter variability in ground thermal conditions was determined at 3 monitoring sites. When comparing conditions over the two winters, 2005–06 was characterised by a decrease in ice thickness that limited the extent of BFI and seasonal cooling of the ground. These changes in ice conditions had a greater effect on the thermal conditions at sites where water depths were close to the maximum ice thickness. The short ice contact times at these sites are important to the thermal state of permafrost, as only minimal heat exchange contributing to permafrost cooling occurs prior to freezeback of the active layer

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2010, vol. 21, no3 [pp. 256-270]

Bibliographic references : 46 ref.

Collation : 11 fig., 3 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.682

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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