Inorganic nutrients and dissolved oxygen in the Canary Current Large Marine Ecosystem
Inorganic nutrients increase with depth as a result of the enhanced remineralization of organic matter with aging waters (the time since they were last near the sea surface), and the opposite happens with dissolved oxygen (except within the saturated surface mixed layer). In the Canary Current Large Marine Ecosystem there is also a marked latitudinal gradient, with the Cape Verde Front separating relatively nutrient-poor and oxygen-rich subtropical waters from the nutrient-rich and oxygen-poor tropical waters. Along a latitudinal band off North-West Africa, coastal upwelling brings the subsurface waters towards the sea surface, locally raising the inorganic nutrient levels. This becomes an important lateral source to both gyres, especially to the nutrient-poor subtropical one, taking place through lateral mixing (mainly as a result of the instability of the coastal-upwelling baroclinic jet) and localized coastal filaments (in those regions, typically capes, where the coastal flow converges and offshore advection takes place). In the southernmost portion of our domain, within tropical waters, there is also high (wind-induced) offshore primary production. This, together with the slow ventilation of the subsurface waters, leads to much enhanced remineralization, producing a region with very low oxygen and high inorganic nutrient levels, the oxygen minimum zone of the North Atlantic Ocean.
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Format: | Report Section biblioteca |
Language: | English |
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IOC-UNESCO
2015
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Subjects: | Cape Verde Front, Inorganic nutrient supply, Biogeochemical processes, Spatial distributions, Oxygen minimum zone, CCLME, |
Online Access: | http://hdl.handle.net/1834/9183 |
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dig-aquadocs-1834-91832021-05-19T07:01:40Z Inorganic nutrients and dissolved oxygen in the Canary Current Large Marine Ecosystem Inorganic nutrients and oxygen in the CCLME Oceanographic and biological features in the Canary Current Large Marine Ecosystem. Pelegrí, Josep L. Peña-Izquierdo, Jesús Valdés, L. Déniz-González, I. Cape Verde Front Inorganic nutrient supply Biogeochemical processes Spatial distributions Oxygen minimum zone CCLME Inorganic nutrients increase with depth as a result of the enhanced remineralization of organic matter with aging waters (the time since they were last near the sea surface), and the opposite happens with dissolved oxygen (except within the saturated surface mixed layer). In the Canary Current Large Marine Ecosystem there is also a marked latitudinal gradient, with the Cape Verde Front separating relatively nutrient-poor and oxygen-rich subtropical waters from the nutrient-rich and oxygen-poor tropical waters. Along a latitudinal band off North-West Africa, coastal upwelling brings the subsurface waters towards the sea surface, locally raising the inorganic nutrient levels. This becomes an important lateral source to both gyres, especially to the nutrient-poor subtropical one, taking place through lateral mixing (mainly as a result of the instability of the coastal-upwelling baroclinic jet) and localized coastal filaments (in those regions, typically capes, where the coastal flow converges and offshore advection takes place). In the southernmost portion of our domain, within tropical waters, there is also high (wind-induced) offshore primary production. This, together with the slow ventilation of the subsurface waters, leads to much enhanced remineralization, producing a region with very low oxygen and high inorganic nutrient levels, the oxygen minimum zone of the North Atlantic Ocean. Published 2016-07-27T15:02:25Z 2016-07-27T15:02:25Z 2015 Report Section Refereed http://hdl.handle.net/1834/9183 en Intergovernmental Oceanographic Commission, Technical Series: 115; http://www.unesco.org/new/en/ioc/ts115 pp. 133-142 Northwest Africa Canary Current IOC-UNESCO Paris, France |
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Cape Verde Front Inorganic nutrient supply Biogeochemical processes Spatial distributions Oxygen minimum zone CCLME Cape Verde Front Inorganic nutrient supply Biogeochemical processes Spatial distributions Oxygen minimum zone CCLME |
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Cape Verde Front Inorganic nutrient supply Biogeochemical processes Spatial distributions Oxygen minimum zone CCLME Cape Verde Front Inorganic nutrient supply Biogeochemical processes Spatial distributions Oxygen minimum zone CCLME Pelegrí, Josep L. Peña-Izquierdo, Jesús Inorganic nutrients and dissolved oxygen in the Canary Current Large Marine Ecosystem |
description |
Inorganic nutrients increase with depth as a result of the enhanced remineralization of organic matter with aging waters (the time since they were last near the sea surface), and the opposite happens with dissolved oxygen (except within the saturated surface mixed layer). In the Canary Current Large Marine Ecosystem there is also a marked latitudinal gradient, with the Cape Verde Front separating relatively nutrient-poor and oxygen-rich subtropical waters from the nutrient-rich and oxygen-poor tropical waters. Along a latitudinal band off North-West Africa, coastal upwelling brings the subsurface waters towards the sea surface, locally raising the inorganic nutrient levels. This becomes an important lateral source to both gyres, especially to the nutrient-poor subtropical one, taking place through lateral mixing (mainly as a result of the instability of the coastal-upwelling baroclinic jet) and localized coastal filaments (in those regions, typically capes, where the coastal flow converges and offshore advection takes place). In the southernmost portion of our domain, within tropical waters, there is also high (wind-induced) offshore primary production. This, together with the slow ventilation of the subsurface waters, leads to much enhanced remineralization, producing a region with very low oxygen and high inorganic nutrient levels, the oxygen minimum zone of the North Atlantic Ocean. |
author2 |
Valdés, L. |
author_facet |
Valdés, L. Pelegrí, Josep L. Peña-Izquierdo, Jesús |
format |
Report Section |
topic_facet |
Cape Verde Front Inorganic nutrient supply Biogeochemical processes Spatial distributions Oxygen minimum zone CCLME |
author |
Pelegrí, Josep L. Peña-Izquierdo, Jesús |
author_sort |
Pelegrí, Josep L. |
title |
Inorganic nutrients and dissolved oxygen in the Canary Current Large Marine Ecosystem |
title_short |
Inorganic nutrients and dissolved oxygen in the Canary Current Large Marine Ecosystem |
title_full |
Inorganic nutrients and dissolved oxygen in the Canary Current Large Marine Ecosystem |
title_fullStr |
Inorganic nutrients and dissolved oxygen in the Canary Current Large Marine Ecosystem |
title_full_unstemmed |
Inorganic nutrients and dissolved oxygen in the Canary Current Large Marine Ecosystem |
title_sort |
inorganic nutrients and dissolved oxygen in the canary current large marine ecosystem |
publisher |
IOC-UNESCO |
publishDate |
2015 |
url |
http://hdl.handle.net/1834/9183 |
work_keys_str_mv |
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