The Beaufort Gyre Observing System 2004 : mooring recovery and deployment operations in pack ice


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dc.contributor.author Kemp, John N.
dc.contributor.author Newhall, Kris
dc.contributor.author Ostrom, William M.
dc.contributor.author Krishfield, Richard A.
dc.contributor.author Proshutinsky, Andrey
dc.coverage.spatial Beaufort Gyre
dc.coverage.spatial Arctic Ocean
dc.date.accessioned 2005-08-10T18:13:27Z
dc.date.available 2005-08-10T18:13:27Z
dc.date.issued 2005-05
dc.identifier.uri http://hdl.handle.net/1912/73
dc.description.abstract Situated beneath the Arctic perennial ice pack, the principal components of the Beaufort Gyre Observing System are three deep-ocean bottom-tethered moorings with CTD and velocity profilers, upward looking sonars for ice draft measurements, and bottom pressure recorders. A major goal of this project is to investigate basin-scale mechanisms regulating freshwater and heat content in the Arctic Ocean and particularly in the Beaufort Gyre throughout several complete annual cycles. The methods of recovering and re-deploying the 3800 m long instrumented moorings from the Canadian Coast Guard Icebreaker Louis S. St. Laurent in August 2004 are described. In ice-covered regions, deployments must be conducted anchor-first, so heavier wire rope and hardware must be incorporated into the mooring design. Backup buoyancy at the bottom of the mooring is advised for backup recovery should intermediate lengths of the mooring system get tangled under ice floes during recovery. An accurate acoustic survey to determine the exact location of the mooring, adequate ice conditions, and skilled ship maneuvering are all essential requirements for a successful mooring recovery. Windlass (or capstan) procedures could be used for the recovery, but a traction winch arrangement is recommended. en
dc.description.sponsorship Funding was provided by the National Science Foundation under Grant Number OPP-0230184 and Woods Hole Oceanographic Insitution’s Ocean and Climate Change Institute. en
dc.format.extent 2040937 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Woods Hole Oceanographic Institution en
dc.relation.ispartofseries WHOI Technical Reports en
dc.relation.ispartofseries WHOI-2005-05 en
dc.subject Arctic operations en
dc.subject Mooring deployments en
dc.subject Beaufort Gyre Observing System en
dc.title The Beaufort Gyre Observing System 2004 : mooring recovery and deployment operations in pack ice en
dc.type Technical Report en
dc.identifier.doi 10.1575/1912/73

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