The Beaufort Gyre Observing System 2004 : mooring recovery and deployment operations in pack ice
Kemp, John N.
Ostrom, William M.
Krishfield, Richard A.
MetadataShow full item record
KeywordArctic operations; Mooring deployments; Beaufort Gyre Observing System; Louis S. St. Laurent (Ship) Cruise JWACS
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.
Suggested CitationKemp, J., Newhall, K., Ostrom, W., Krishfield, R., & Proshutinsky, A. (2005). The Beaufort Gyre Observing System 2004: mooring recovery and deployment operations in pack ice. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/73
Showing items related by title, author, creator and subject.
Massachusetts Offshore Wind Metocean Initiative: Reducing risks and accelerating deployment timeframes via a coordinated regional observing system Kirincich, Anthony R.; Faluotico, Stephen M. (2016-12-23)AWS Truepower (AWST) has been engaged by the Massachusetts Clean Energy Center (MassCEC) to provide monthly observed data summary reports for the wind resource monitoring equipment deployed on the Woods Hole Oceanographic ...
Ostrom, William M.; Kemp, John N.; Krishfield, Richard A.; Proshutinsky, Andrey (Woods Hole Oceanographic Institution, 2004-01)The Beaufort Gyre Freshwater Experiment (BGFE) observational program was designed to measure the freshwater content of the upper ocean and sea ice in the Beaufort Gyre of the Arctic Ocean using bottom-tethered moorings, ...
Meneghello, Gianluca; Marshall, John; Cole, Sylvia T.; Timmermans, Mary-Louise (John Wiley & Sons, 2017-12-26)Using Ekman pumping rates mediated by sea ice in the Arctic Ocean's Beaufort Gyre (BG), the magnitude of lateral eddy diffusivities required to balance downward pumping is inferred. In this limit—that of vanishing residual-mean ...