Eddy transport of organic carbon and nutrients from the Chukchi Shelf: Impact on the upper halocline of the western Arctic Ocean
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 continent...
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ftsouthampton:oai:eprints.soton.ac.uk:357437 2023-07-30T03:59:54+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 https://eprints.soton.ac.uk/357437/ English eng Mathis, Jeremy T., Pickart, Robert S., Hansell, Dennis A., Kadko, David and Bates, Nicholas R. (2007) Eddy transport of organic carbon and nutrients from the Chukchi Shelf: Impact on the upper halocline of the western Arctic Ocean. Journal of Geophysical Research: Oceans, 112 (C5), C05011. (doi:10.1029/2006JC003899 <http://dx.doi.org/10.1029/2006JC003899>). Article PeerReviewed 2007 ftsouthampton https://doi.org/10.1029/2006JC003899 2023-07-09T21:49:16Z 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 ?mol L?1), nitrate (+5 ?mol L?1), and phosphate (+0.4 ?mol L?1). Organic carbon in the eddy core was also elevated: POC (+3.8 ?mol L?1) and DOC (+11 ?mol 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. Article in Journal/Newspaper Arctic Arctic Arctic Ocean canada basin Chukchi University of Southampton: e-Prints Soton Arctic Arctic Ocean Canada Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) Pacific Journal of Geophysical Research 112 C5 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
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 ?mol L?1), nitrate (+5 ?mol L?1), and phosphate (+0.4 ?mol L?1). Organic carbon in the eddy core was also elevated: POC (+3.8 ?mol L?1) and DOC (+11 ?mol 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. |
format |
Article in Journal/Newspaper |
author |
Mathis, Jeremy T. Pickart, Robert S. Hansell, Dennis A. Kadko, David Bates, Nicholas R. |
spellingShingle |
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 |
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 |
publishDate |
2007 |
url |
https://eprints.soton.ac.uk/357437/ |
long_lat |
ENVELOPE(-169.167,-169.167,70.550,70.550) |
geographic |
Arctic Arctic Ocean Canada Chukchi Shelf Pacific |
geographic_facet |
Arctic Arctic Ocean Canada Chukchi Shelf Pacific |
genre |
Arctic Arctic Arctic Ocean canada basin Chukchi |
genre_facet |
Arctic Arctic Arctic Ocean canada basin Chukchi |
op_relation |
Mathis, Jeremy T., Pickart, Robert S., Hansell, Dennis A., Kadko, David and Bates, Nicholas R. (2007) Eddy transport of organic carbon and nutrients from the Chukchi Shelf: Impact on the upper halocline of the western Arctic Ocean. Journal of Geophysical Research: Oceans, 112 (C5), C05011. (doi:10.1029/2006JC003899 <http://dx.doi.org/10.1029/2006JC003899>). |
op_doi |
https://doi.org/10.1029/2006JC003899 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
C5 |
_version_ |
1772810614097313792 |