Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange


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dc.contributor.author Kadko, David
dc.contributor.author Pickart, Robert S.
dc.contributor.author Mathis, Jeremy T.
dc.date.accessioned 2010-06-08T19:47:10Z
dc.date.available 2010-06-08T19:47:10Z
dc.date.issued 2008-02-22
dc.identifier.citation Journal of Geophysical Research 113 (2008): C02018 en_US
dc.identifier.uri http://hdl.handle.net/1912/3613
dc.description Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 113 (2008): C02018, doi:10.1029/2007JC004429. en_US
dc.description.abstract Radioisotope evaluation of a cold-core, anticyclonic eddy surveyed in September 2004 on the Chukchi Sea continental slope was used to determine its age since formation over the shelf environment. Because the eddy can be shown to have been generated near the shelf break, initial conditions for several age-dependent tracers could be relatively well constrained. A combination of 228Ra/226Ra, excess 224Ra, and 228Th/228Ra suggested an age on the order of months. This age is consistent with the presence of elevated concentrations of nutrients, organic carbon, suspended particles, and shelf-derived neritic zooplankton within the eddy compared to ambient offshore water in the Canada Basin but comparable to values measured in the Chukchi shelf and shelf-break environment. Hence this feature, at the edge of the deep basin, was poised to deliver biogeochemically significant shelf material to the central Arctic Ocean. en_US
dc.description.sponsorship This work was supported by National Science Foundation Polar Programs grants OPP-662690 and OPP-66040N to the University of Miami (DK), and Office of Naval Research grant N00014-02-1-0317 (RP). en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2007JC004429
dc.subject Arctic en_US
dc.subject Eddy en_US
dc.subject Radium en_US
dc.title Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange en_US
dc.type Article en_US
dc.identifier.doi 10.1029/2007JC004429

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