Mechanisms for vertical nutrient transport within a North Atlantic mesoscale eddy
Prompted by observational evidence for an enhanced source of surface nutrients within an anticyclonic eddy in the NE Atlantic, we investigate vertical transport processes that may produce such a phenomenon. For the eddy investigated, the dominant mechanism is found to be ageostrophic circulation res...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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2001
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ftsouthampton:oai:eprints.soton.ac.uk:7918 2023-07-30T04:05:24+02:00 Mechanisms for vertical nutrient transport within a North Atlantic mesoscale eddy Martin, A.P. Richards, K.J. 2001 https://eprints.soton.ac.uk/7918/ unknown Martin, A.P. and Richards, K.J. (2001) Mechanisms for vertical nutrient transport within a North Atlantic mesoscale eddy. Deep Sea Research Part II: Topical Studies in Oceanography, 48 (4-5), 757-773. (doi:10.1016/S0967-0645(00)00096-5 <http://dx.doi.org/10.1016/S0967-0645(00)00096-5>). Article PeerReviewed 2001 ftsouthampton https://doi.org/10.1016/S0967-0645(00)00096-5 2023-07-09T20:29:23Z Prompted by observational evidence for an enhanced source of surface nutrients within an anticyclonic eddy in the NE Atlantic, we investigate vertical transport processes that may produce such a phenomenon. For the eddy investigated, the dominant mechanism is found to be ageostrophic circulation resulting from a perturbation of the circular flow of the eddy. This can produce upwelling velocities of order 10 md?1. Ekman pumping due to wind stress on the eddy also produces upwelling within, but on a smaller scale of ~0.5 md?1. There is no evidence that self-propagation of the eddy leads to an enhanced nutrient flux by displacement upwards of nutrient-laden deeper isopycnals over the core of the eddy. Deeper winter mixing within the eddy relative to the surroundings, however, may contribute to the elevated nutrient levels. Article in Journal/Newspaper North Atlantic University of Southampton: e-Prints Soton Deep Sea Research Part II: Topical Studies in Oceanography 48 4-5 757 773 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
Prompted by observational evidence for an enhanced source of surface nutrients within an anticyclonic eddy in the NE Atlantic, we investigate vertical transport processes that may produce such a phenomenon. For the eddy investigated, the dominant mechanism is found to be ageostrophic circulation resulting from a perturbation of the circular flow of the eddy. This can produce upwelling velocities of order 10 md?1. Ekman pumping due to wind stress on the eddy also produces upwelling within, but on a smaller scale of ~0.5 md?1. There is no evidence that self-propagation of the eddy leads to an enhanced nutrient flux by displacement upwards of nutrient-laden deeper isopycnals over the core of the eddy. Deeper winter mixing within the eddy relative to the surroundings, however, may contribute to the elevated nutrient levels. |
format |
Article in Journal/Newspaper |
author |
Martin, A.P. Richards, K.J. |
spellingShingle |
Martin, A.P. Richards, K.J. Mechanisms for vertical nutrient transport within a North Atlantic mesoscale eddy |
author_facet |
Martin, A.P. Richards, K.J. |
author_sort |
Martin, A.P. |
title |
Mechanisms for vertical nutrient transport within a North Atlantic mesoscale eddy |
title_short |
Mechanisms for vertical nutrient transport within a North Atlantic mesoscale eddy |
title_full |
Mechanisms for vertical nutrient transport within a North Atlantic mesoscale eddy |
title_fullStr |
Mechanisms for vertical nutrient transport within a North Atlantic mesoscale eddy |
title_full_unstemmed |
Mechanisms for vertical nutrient transport within a North Atlantic mesoscale eddy |
title_sort |
mechanisms for vertical nutrient transport within a north atlantic mesoscale eddy |
publishDate |
2001 |
url |
https://eprints.soton.ac.uk/7918/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Martin, A.P. and Richards, K.J. (2001) Mechanisms for vertical nutrient transport within a North Atlantic mesoscale eddy. Deep Sea Research Part II: Topical Studies in Oceanography, 48 (4-5), 757-773. (doi:10.1016/S0967-0645(00)00096-5 <http://dx.doi.org/10.1016/S0967-0645(00)00096-5>). |
op_doi |
https://doi.org/10.1016/S0967-0645(00)00096-5 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
48 |
container_issue |
4-5 |
container_start_page |
757 |
op_container_end_page |
773 |
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1772817266357829632 |