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M.A. Thesis (Beaufort Sea Ice-scour Tracks)

Publication
Wahlgren, R. V. 1979. Ice-scour tracks on the Beaufort Sea Continental Shelf - their form and an interpretation of the processes creating them, unpublished M.A. thesis, Department of Geography, Carleton University, Ottawa, 183 pp.

Abstract
Quantitative geomorphological analyses are made of ice-scour tracks created by drift ice scraping the seabed of the southeastern Beaufort Sea. The data consists of measurements from echograms and sonograph mosaics. Methods are developed for making the measurements. A classification scheme for ice-scour track planimetric form is developed. The results of the analyses include: grounding ice having less than 45 m draft usually does not dig further into the sediment as the ice keel proceeds upslope; keels approaching normal to the slope leave shorter tracks than keels which travel along the slope; ice floe interaction processes can explain the various planimetric forms of tracks; deep ice keel drafts and tracks are fairly rare events; and excess pore water pressure beneath a moving, grounded ice keel evidently can support negative buoyancy of the keel. The ice-scouring process is analysed using an energy flow model which is adaptable to computer simulation.
 
Arctic Science and Technology Information System, ASTIS document number 65226.

Reference copies are available at
  • Carleton University, Ottawa, Canada (this is a link to a free download of the thesis as a pdf)
  • Memorial University of Newfoundland, Ocean Engineering Information Centre (Standard Canadian interlibrary loan code NFSMO)
  • National Library of Canada, Ottawa
  • University of Calgary, Interlibrary Loan Office (Standard Canadian interlibrary loan code ACU)

Copies may be borrowed from Library and Archives Canada via an interlibrary loan using your local library. Please reference the search result at this link (new page will open).

Ice-scour track images are available here: Natural Resources Canada Marine Geological Research in the Canadian Beaufort Sea

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