On the source of Gulf Stream nutrients
18 pages, 11 figures, 2 tables, supporting information http://onlinelibrary.wiley.com/doi/10.1029/2007JC004611/full Along density surfaces, nutrient concentrations in the Gulf Stream are elevated relative to concentrations to either side of the current. We assess the source of these elevated nutrien...
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ftcsic:oai:digital.csic.es:10261/116237 2024-02-11T10:06:16+01:00 On the source of Gulf Stream nutrients Palter, Jaime B. Lozier, M. Susan 2008-06 http://hdl.handle.net/10261/116237 https://doi.org/10.1029/2007JC004611 unknown American Geophysical Union https://doi.org/10.1029/2007JC004611 doi:10.1029/2007JC004611 issn: 0148-0227 e-issn: 2156-2202 Journal of Geophysical Research 113(C6): (2008) http://hdl.handle.net/10261/116237 open artÃculo http://purl.org/coar/resource_type/c_6501 2008 ftcsic https://doi.org/10.1029/2007JC004611 2024-01-16T10:07:47Z 18 pages, 11 figures, 2 tables, supporting information http://onlinelibrary.wiley.com/doi/10.1029/2007JC004611/full Along density surfaces, nutrient concentrations in the Gulf Stream are elevated relative to concentrations to either side of the current. We assess the source of these elevated nutrient concentrations in the western boundary current using historical hydrographic data. The analysis is extended to the separated Gulf Stream with four hydrographic sections recently occupied as part of the Climate Variability and Predictability Program (CLIVAR) Mode Water Dynamics Experiment. The results of this analysis suggest that imported, extrasubtropical waters are the primary source of the elevated nutrient concentrations. Because the high nutrient signature is likely imported, diapycnal mixing need not be invoked to explain the Gulf Stream's high nutrient concentrations, as had been proposed in the past. Moreover, nutrients do not increase along the length of the stream, further suggesting that the stream's high nutrient signature is imported rather than manufactured by processes within the current. The imported nutrients are likely advected into the North Atlantic within the low-salinity water masses that contribute to the shallow limb of the meridional overturning circulation. Thus the availability of nutrients in the North Atlantic may be linked to upstream processes in the tropics and possibly the Southern Hemisphere as well as to variability in the volume of imported water and its distribution in density space. Copyright 2008 by the American Geophysical Union The authors gratefully acknowledge support from the National Science Foundation Peer Reviewed Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Journal of Geophysical Research 113 C6 |
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Digital.CSIC (Spanish National Research Council) |
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18 pages, 11 figures, 2 tables, supporting information http://onlinelibrary.wiley.com/doi/10.1029/2007JC004611/full Along density surfaces, nutrient concentrations in the Gulf Stream are elevated relative to concentrations to either side of the current. We assess the source of these elevated nutrient concentrations in the western boundary current using historical hydrographic data. The analysis is extended to the separated Gulf Stream with four hydrographic sections recently occupied as part of the Climate Variability and Predictability Program (CLIVAR) Mode Water Dynamics Experiment. The results of this analysis suggest that imported, extrasubtropical waters are the primary source of the elevated nutrient concentrations. Because the high nutrient signature is likely imported, diapycnal mixing need not be invoked to explain the Gulf Stream's high nutrient concentrations, as had been proposed in the past. Moreover, nutrients do not increase along the length of the stream, further suggesting that the stream's high nutrient signature is imported rather than manufactured by processes within the current. The imported nutrients are likely advected into the North Atlantic within the low-salinity water masses that contribute to the shallow limb of the meridional overturning circulation. Thus the availability of nutrients in the North Atlantic may be linked to upstream processes in the tropics and possibly the Southern Hemisphere as well as to variability in the volume of imported water and its distribution in density space. Copyright 2008 by the American Geophysical Union The authors gratefully acknowledge support from the National Science Foundation Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Palter, Jaime B. Lozier, M. Susan |
spellingShingle |
Palter, Jaime B. Lozier, M. Susan On the source of Gulf Stream nutrients |
author_facet |
Palter, Jaime B. Lozier, M. Susan |
author_sort |
Palter, Jaime B. |
title |
On the source of Gulf Stream nutrients |
title_short |
On the source of Gulf Stream nutrients |
title_full |
On the source of Gulf Stream nutrients |
title_fullStr |
On the source of Gulf Stream nutrients |
title_full_unstemmed |
On the source of Gulf Stream nutrients |
title_sort |
on the source of gulf stream nutrients |
publisher |
American Geophysical Union |
publishDate |
2008 |
url |
http://hdl.handle.net/10261/116237 https://doi.org/10.1029/2007JC004611 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://doi.org/10.1029/2007JC004611 doi:10.1029/2007JC004611 issn: 0148-0227 e-issn: 2156-2202 Journal of Geophysical Research 113(C6): (2008) http://hdl.handle.net/10261/116237 |
op_rights |
open |
op_doi |
https://doi.org/10.1029/2007JC004611 |
container_title |
Journal of Geophysical Research |
container_volume |
113 |
container_issue |
C6 |
_version_ |
1790603885394526208 |