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Eddies in the Canada Basin, Arctic Ocean, observed from ice-tethered profilers

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dc.contributor.author Timmermans, Mary-Louise
dc.contributor.author Toole, John M.
dc.contributor.author Proshutinsky, Andrey
dc.contributor.author Krishfield, Richard A.
dc.contributor.author Plueddemann, Albert J.
dc.date.accessioned 2010-11-02T15:49:22Z
dc.date.available 2010-11-02T15:49:22Z
dc.date.issued 2008-01
dc.identifier.citation Journal of Physical Oceanography 38 (2008): 133–145 en_US
dc.identifier.uri http://hdl.handle.net/1912/4041
dc.description Author Posting. © American Meteorological Society, 2008. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 38 (2008): 133–145, doi:10.1175/2007JPO3782.1. en_US
dc.description.abstract Five ice-tethered profilers (ITPs), deployed between 2004 and 2006, have provided detailed potential temperature θ and salinity S profiles from 21 anticyclonic eddy encounters in the central Canada Basin of the Arctic Ocean. The 12–35-m-thick eddies have center depths between 42 and 69 m in the Arctic halocline, and are shallower and less dense than the majority of eddies observed previously in the central Canada Basin. They are characterized by anomalously cold θ and low stratification, and have horizontal scales on the order of, or less than, the Rossby radius of deformation (about 10 km). Maximum azimuthal speeds estimated from dynamic heights (assuming cyclogeostrophic balance) are between 9 and 26 cm s−1, an order of magnitude larger than typical ambient flow speeds in the central basin. Eddy θ–S and potential vorticity properties, as well as horizontal and vertical scales, are consistent with their formation by instability of a surface front at about 80°N that appears in historical CTD and expendable CTD (XCTD) measurements. This would suggest eddy lifetimes longer than 6 months. While the baroclinic instability of boundary currents cannot be ruled out as a generation mechanism, it is less likely since deeper eddies that would originate from the deeper-reaching boundary flows are not observed in the survey region. en_US
dc.description.sponsorship The engineering design work for the ITP was initiated by the Cecil H. and Ida M. Green Technology Innovation Program (an internal program at the Woods Hole Oceanographic Institution). Prototype development and construction were funded jointly by the U.S. National Science Foundation (NSF) Oceanographic Technology and Interdisciplinary Coordination Program and Office of Polar Programs (OPP) under Award OCE-0324233. Continued support has been provided by the OPP Arctic Sciences Section under Award ARC-0519899 and internal WHOI funding. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Meteorological Society en_US
dc.relation.uri http://dx.doi.org/10.1175/2007JPO3782.1
dc.subject Arctic en_US
dc.subject Eddies en_US
dc.subject Profilers en_US
dc.subject Stability en_US
dc.subject Salinity en_US
dc.title Eddies in the Canada Basin, Arctic Ocean, observed from ice-tethered profilers en_US
dc.type Article en_US
dc.identifier.doi 10.1175/2007JPO3782.1


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