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

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. Radioisotope eva...

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Published in:Journal of Geophysical Research
Main Authors: Kadko, David, Pickart, Robert S., Mathis, Jeremy T.
Format: Article in Journal/Newspaper
Language:English
Published: American Geophysical Union 2008
Subjects:
Online Access:https://hdl.handle.net/1912/3613
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spelling ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3613 2023-05-15T14:53:38+02:00 Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange Kadko, David Pickart, Robert S. Mathis, Jeremy T. 2008-02-22 application/pdf https://hdl.handle.net/1912/3613 en_US eng American Geophysical Union https://doi.org/10.1029/2007JC004429 Journal of Geophysical Research 113 (2008): C02018 https://hdl.handle.net/1912/3613 doi:10.1029/2007JC004429 Journal of Geophysical Research 113 (2008): C02018 doi:10.1029/2007JC004429 Arctic Eddy Radium Article 2008 ftwhoas https://doi.org/10.1029/2007JC004429 2022-05-28T22:58:02Z 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. 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. 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). Article in Journal/Newspaper Arctic Arctic Ocean canada basin Central Arctic Chukchi Chukchi Sea Zooplankton Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Arctic Ocean Canada Chukchi Sea Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) Journal of Geophysical Research 113 C2
institution Open Polar
collection Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
op_collection_id ftwhoas
language English
topic Arctic
Eddy
Radium
spellingShingle Arctic
Eddy
Radium
Kadko, David
Pickart, Robert S.
Mathis, Jeremy T.
Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange
topic_facet Arctic
Eddy
Radium
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. 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. 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).
format Article in Journal/Newspaper
author Kadko, David
Pickart, Robert S.
Mathis, Jeremy T.
author_facet Kadko, David
Pickart, Robert S.
Mathis, Jeremy T.
author_sort Kadko, David
title Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange
title_short Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange
title_full Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange
title_fullStr Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange
title_full_unstemmed Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange
title_sort age characteristics of a shelf-break eddy in the western arctic and implications for shelf-basin exchange
publisher American Geophysical Union
publishDate 2008
url https://hdl.handle.net/1912/3613
long_lat ENVELOPE(-169.167,-169.167,70.550,70.550)
geographic Arctic
Arctic Ocean
Canada
Chukchi Sea
Chukchi Shelf
geographic_facet Arctic
Arctic Ocean
Canada
Chukchi Sea
Chukchi Shelf
genre Arctic
Arctic Ocean
canada basin
Central Arctic
Chukchi
Chukchi Sea
Zooplankton
genre_facet Arctic
Arctic Ocean
canada basin
Central Arctic
Chukchi
Chukchi Sea
Zooplankton
op_source Journal of Geophysical Research 113 (2008): C02018
doi:10.1029/2007JC004429
op_relation https://doi.org/10.1029/2007JC004429
Journal of Geophysical Research 113 (2008): C02018
https://hdl.handle.net/1912/3613
doi:10.1029/2007JC004429
op_doi https://doi.org/10.1029/2007JC004429
container_title Journal of Geophysical Research
container_volume 113
container_issue C2
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