Eddy transport of organic carbon and nutrients from the Chukchi Shelf : impact on the upper halocline of the western Arctic Ocean
Author Posting. © American Geophysical Union, 2007. 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 112 (2007): C05011, doi:10.1029/2006JC003899. In September 200...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3659 2023-05-15T14:58:08+02:00 Eddy transport of organic carbon and nutrients from the Chukchi Shelf : impact on the upper halocline of the western Arctic Ocean Mathis, Jeremy T. Pickart, Robert S. Hansell, Dennis A. Kadko, David Bates, Nicholas R. 2007-05-04 application/pdf https://hdl.handle.net/1912/3659 en_US eng American Geophysical Union https://doi.org/10.1029/2006JC003899 Journal of Geophysical Research 112 (2007): C05011 https://hdl.handle.net/1912/3659 doi:10.1029/2006JC003899 Journal of Geophysical Research 112 (2007): C05011 doi:10.1029/2006JC003899 Arctic Eddy Carbon Nutrients Shelf-basin exchange Chukchi Sea Article 2007 ftwhoas https://doi.org/10.1029/2006JC003899 2022-05-28T22:58:02Z Author Posting. © American Geophysical Union, 2007. 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 112 (2007): C05011, doi:10.1029/2006JC003899. In September 2004 a detailed physical and chemical survey was conducted on an anticyclonic, cold-core eddy located seaward of the Chukchi Shelf in the western Arctic Ocean. The eddy had a diameter of ∼16 km and was centered at a depth of ∼160 m between the 1000 and 1500 m isobaths over the continental slope. The water in the core of the eddy (total volume of 25 km3) was of Pacific origin, and contained elevated concentrations of nutrients, organic carbon, and suspended particles. The feature, which likely formed from the boundary current along the edge of the Chukchi Shelf, provides a mechanism for transport of carbon, oxygen, and nutrients directly into the upper halocline of the Canada Basin. Nutrient concentrations in the eddy core were elevated compared to waters of similar density in the deep Canada Basin: silicate (+20 μmol L−1), nitrate (+5 μmol L−1), and phosphate (+0.4 μmol L−1). Organic carbon in the eddy core was also elevated: POC (+3.8 μmol L−1) and DOC (+11 μmol L−1). From these observations, the eddy contained 1.25 × 109 moles Si, 4.5 × 108 moles NO3 −, 5.5 × 107 moles PO3 −, 1.2 × 108 moles POC, and 1.9 × 109 moles DOC, all available for transport to the interior of the Canada Basin. This suggests that such eddies likely play a significant role in maintaining the nutrient maxima observed in the upper halocline. Assuming that shelf-to-basin eddy transport is the dominant renewal mechanism for waters of the upper halocline, remineralization of the excess organic carbon transported into the interior would consume 6.70 × 1010 moles of O2, or one half the total oxygen consumption anticipated arising from all export processes impacting the upper halocline. This work was supported by the National Science Foundation, and ... Article in Journal/Newspaper Arctic Arctic Ocean canada basin Chukchi Chukchi Sea 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) Pacific Journal of Geophysical Research 112 C5 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Arctic Eddy Carbon Nutrients Shelf-basin exchange Chukchi Sea |
spellingShingle |
Arctic Eddy Carbon Nutrients Shelf-basin exchange Chukchi Sea Mathis, Jeremy T. Pickart, Robert S. Hansell, Dennis A. Kadko, David Bates, Nicholas R. Eddy transport of organic carbon and nutrients from the Chukchi Shelf : impact on the upper halocline of the western Arctic Ocean |
topic_facet |
Arctic Eddy Carbon Nutrients Shelf-basin exchange Chukchi Sea |
description |
Author Posting. © American Geophysical Union, 2007. 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 112 (2007): C05011, doi:10.1029/2006JC003899. In September 2004 a detailed physical and chemical survey was conducted on an anticyclonic, cold-core eddy located seaward of the Chukchi Shelf in the western Arctic Ocean. The eddy had a diameter of ∼16 km and was centered at a depth of ∼160 m between the 1000 and 1500 m isobaths over the continental slope. The water in the core of the eddy (total volume of 25 km3) was of Pacific origin, and contained elevated concentrations of nutrients, organic carbon, and suspended particles. The feature, which likely formed from the boundary current along the edge of the Chukchi Shelf, provides a mechanism for transport of carbon, oxygen, and nutrients directly into the upper halocline of the Canada Basin. Nutrient concentrations in the eddy core were elevated compared to waters of similar density in the deep Canada Basin: silicate (+20 μmol L−1), nitrate (+5 μmol L−1), and phosphate (+0.4 μmol L−1). Organic carbon in the eddy core was also elevated: POC (+3.8 μmol L−1) and DOC (+11 μmol L−1). From these observations, the eddy contained 1.25 × 109 moles Si, 4.5 × 108 moles NO3 −, 5.5 × 107 moles PO3 −, 1.2 × 108 moles POC, and 1.9 × 109 moles DOC, all available for transport to the interior of the Canada Basin. This suggests that such eddies likely play a significant role in maintaining the nutrient maxima observed in the upper halocline. Assuming that shelf-to-basin eddy transport is the dominant renewal mechanism for waters of the upper halocline, remineralization of the excess organic carbon transported into the interior would consume 6.70 × 1010 moles of O2, or one half the total oxygen consumption anticipated arising from all export processes impacting the upper halocline. This work was supported by the National Science Foundation, and ... |
format |
Article in Journal/Newspaper |
author |
Mathis, Jeremy T. Pickart, Robert S. Hansell, Dennis A. Kadko, David Bates, Nicholas R. |
author_facet |
Mathis, Jeremy T. Pickart, Robert S. Hansell, Dennis A. Kadko, David Bates, Nicholas R. |
author_sort |
Mathis, Jeremy T. |
title |
Eddy transport of organic carbon and nutrients from the Chukchi Shelf : impact on the upper halocline of the western Arctic Ocean |
title_short |
Eddy transport of organic carbon and nutrients from the Chukchi Shelf : impact on the upper halocline of the western Arctic Ocean |
title_full |
Eddy transport of organic carbon and nutrients from the Chukchi Shelf : impact on the upper halocline of the western Arctic Ocean |
title_fullStr |
Eddy transport of organic carbon and nutrients from the Chukchi Shelf : impact on the upper halocline of the western Arctic Ocean |
title_full_unstemmed |
Eddy transport of organic carbon and nutrients from the Chukchi Shelf : impact on the upper halocline of the western Arctic Ocean |
title_sort |
eddy transport of organic carbon and nutrients from the chukchi shelf : impact on the upper halocline of the western arctic ocean |
publisher |
American Geophysical Union |
publishDate |
2007 |
url |
https://hdl.handle.net/1912/3659 |
long_lat |
ENVELOPE(-169.167,-169.167,70.550,70.550) |
geographic |
Arctic Arctic Ocean Canada Chukchi Sea Chukchi Shelf Pacific |
geographic_facet |
Arctic Arctic Ocean Canada Chukchi Sea Chukchi Shelf Pacific |
genre |
Arctic Arctic Ocean canada basin Chukchi Chukchi Sea |
genre_facet |
Arctic Arctic Ocean canada basin Chukchi Chukchi Sea |
op_source |
Journal of Geophysical Research 112 (2007): C05011 doi:10.1029/2006JC003899 |
op_relation |
https://doi.org/10.1029/2006JC003899 Journal of Geophysical Research 112 (2007): C05011 https://hdl.handle.net/1912/3659 doi:10.1029/2006JC003899 |
op_doi |
https://doi.org/10.1029/2006JC003899 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
C5 |
_version_ |
1766330226758909952 |