Meridional and zonal changes in water properties along the continental slope off central and northern Chile
The Humboldt-09 cruise covered a narrow meridional band along the Chilean continental slope (44?23º S). Here we use physical\nand biochemical data from a long meridional section (4000 km) and three short zonal sections (100 km) to describe the distribution of the\ndifferent water masses found in thi...
Published in: | Ciencias Marinas |
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2013
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Online Access: | http://hdl.handle.net/10553/9674 https://doi.org/10.7773/cm.v38i1B.1814 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/9674 2023-05-15T13:45:50+02:00 Meridional and zonal changes in water properties along the continental slope off central and northern Chile Cambios latitudinales y zonales en los parámetros oceanográficos a lo largo del talud continental en la zona centro y norte de Chile Llanillo, P. J. Pelegrí Llopart, José Luis Duarte, Carlos M. Emelianov, Mikhail Gasser Rubinat, Marc Gourrion, J. Rodriguez-Santana, A. Duarte, Carlos M Llanillo, Pedro Pelegri, Josep Rodriguez-Santana, Angel Emelianov, Mikhail 55249939000 7003869003 55636631300 6602966273 57198095042 6507049836 55954140200 5824069 358123 20777 851011 661664 1702910 1821092 WOS:Llanillo, PJ WOS:Pelegri, JL WOS:Duarte, CM WOS:Emelianov, M WOS:Gasser, M WOS:Gourrion, J WOS:Rodriguez-Santana, A 2013-02-15T06:02:28Z application/pdf http://hdl.handle.net/10553/9674 https://doi.org/10.7773/cm.v38i1B.1814 eng eng Ciencias Marinas 38 0185-3880 http://hdl.handle.net/10553/9674 doi:10.7773/cm.v38i1B.1814 84859150891 000305593100011 662994 WOS:000305593100011 A-7670-2013 L-5877-2015 L-5815-2014 H-8596-2015 No ID by-nc-nd info:eu-repo/semantics/openAccess CC-BY-NC-ND Ciencias Marinas[ISSN 0185-3880],v. 38 (1B), p. 307-332 251007 Oceanografía física Análisis óptimo multiparamétrico cuasi-extendido Zona de mínimo oxígeno Masas de agua Sistema de la Corriente de Humboldt info:eu-repo/semantics/Article Article 2013 ftunivlaspalmas https://doi.org/10.7773/cm.v38i1B.1814 2020-05-19T23:09:21Z The Humboldt-09 cruise covered a narrow meridional band along the Chilean continental slope (44?23º S). Here we use physical\nand biochemical data from a long meridional section (4000 km) and three short zonal sections (100 km) to describe the distribution of the\ndifferent water masses found in this region. Six water masses were identified: Subantarctic Water (SAAW), Summer Subantarctic Water\n(SSAW), Subtropical Water (STW), Equatorial Subsurface Water (ESSW), Antarctic Intermediate Water (AAIW), and Pacific Deep Water\n(PDW). For the first time, a novel set of source water mass properties (or water types) is introduced for SSAW, and nutrient and dissolved\noxygen water types are proposed for all the water masses. Optimum multiparameter (OMP) analysis was used through an iterative process to\nobtain a sound definition of the water types that minimizes the residuals of the method. Both the classic OMP and the quasi-extended OMP\nmodels reproduced the data rather well. Finally, the spatial distribution of the different water masses was calculated with the quasi-extended\nOMP, which is not influenced by the respiration of organic matter. The distribution of the different water masses is presented over the\nmeridional and zonal transects and in property-property diagrams. A smooth meridional transition from subantarctic to tropical and equatorial\nwater masses is observed in this area. This transition takes place in surface, central, and intermediate waters over distances of the order of 1000\nkm. The meridional transition contrasts with the abrupt zonal changes found in the cross-slope direction, which are of comparable magnitude\nbut over distances of the order of 100 km. Both AAIW and SAAW (fresh and well oxygenated) partially mix with the hypoxic ESSW and,\ntherefore, play an important role in the ventilation of the southern part of the oxygen minimum zone. 332 307 Article in Journal/Newspaper Antarc* Antarctic Universidad de Las Palmas de Gran Canaria: Acceda Antarctic Pacific Ciencias Marinas 38 1B 307 332 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251007 Oceanografía física Análisis óptimo multiparamétrico cuasi-extendido Zona de mínimo oxígeno Masas de agua Sistema de la Corriente de Humboldt |
spellingShingle |
251007 Oceanografía física Análisis óptimo multiparamétrico cuasi-extendido Zona de mínimo oxígeno Masas de agua Sistema de la Corriente de Humboldt Llanillo, P. J. Pelegrí Llopart, José Luis Duarte, Carlos M. Emelianov, Mikhail Gasser Rubinat, Marc Gourrion, J. Rodriguez-Santana, A. Meridional and zonal changes in water properties along the continental slope off central and northern Chile |
topic_facet |
251007 Oceanografía física Análisis óptimo multiparamétrico cuasi-extendido Zona de mínimo oxígeno Masas de agua Sistema de la Corriente de Humboldt |
description |
The Humboldt-09 cruise covered a narrow meridional band along the Chilean continental slope (44?23º S). Here we use physical\nand biochemical data from a long meridional section (4000 km) and three short zonal sections (100 km) to describe the distribution of the\ndifferent water masses found in this region. Six water masses were identified: Subantarctic Water (SAAW), Summer Subantarctic Water\n(SSAW), Subtropical Water (STW), Equatorial Subsurface Water (ESSW), Antarctic Intermediate Water (AAIW), and Pacific Deep Water\n(PDW). For the first time, a novel set of source water mass properties (or water types) is introduced for SSAW, and nutrient and dissolved\noxygen water types are proposed for all the water masses. Optimum multiparameter (OMP) analysis was used through an iterative process to\nobtain a sound definition of the water types that minimizes the residuals of the method. Both the classic OMP and the quasi-extended OMP\nmodels reproduced the data rather well. Finally, the spatial distribution of the different water masses was calculated with the quasi-extended\nOMP, which is not influenced by the respiration of organic matter. The distribution of the different water masses is presented over the\nmeridional and zonal transects and in property-property diagrams. A smooth meridional transition from subantarctic to tropical and equatorial\nwater masses is observed in this area. This transition takes place in surface, central, and intermediate waters over distances of the order of 1000\nkm. The meridional transition contrasts with the abrupt zonal changes found in the cross-slope direction, which are of comparable magnitude\nbut over distances of the order of 100 km. Both AAIW and SAAW (fresh and well oxygenated) partially mix with the hypoxic ESSW and,\ntherefore, play an important role in the ventilation of the southern part of the oxygen minimum zone. 332 307 |
author2 |
Duarte, Carlos M Llanillo, Pedro Pelegri, Josep Rodriguez-Santana, Angel Emelianov, Mikhail 55249939000 7003869003 55636631300 6602966273 57198095042 6507049836 55954140200 5824069 358123 20777 851011 661664 1702910 1821092 WOS:Llanillo, PJ WOS:Pelegri, JL WOS:Duarte, CM WOS:Emelianov, M WOS:Gasser, M WOS:Gourrion, J WOS:Rodriguez-Santana, A |
format |
Article in Journal/Newspaper |
author |
Llanillo, P. J. Pelegrí Llopart, José Luis Duarte, Carlos M. Emelianov, Mikhail Gasser Rubinat, Marc Gourrion, J. Rodriguez-Santana, A. |
author_facet |
Llanillo, P. J. Pelegrí Llopart, José Luis Duarte, Carlos M. Emelianov, Mikhail Gasser Rubinat, Marc Gourrion, J. Rodriguez-Santana, A. |
author_sort |
Llanillo, P. J. |
title |
Meridional and zonal changes in water properties along the continental slope off central and northern Chile |
title_short |
Meridional and zonal changes in water properties along the continental slope off central and northern Chile |
title_full |
Meridional and zonal changes in water properties along the continental slope off central and northern Chile |
title_fullStr |
Meridional and zonal changes in water properties along the continental slope off central and northern Chile |
title_full_unstemmed |
Meridional and zonal changes in water properties along the continental slope off central and northern Chile |
title_sort |
meridional and zonal changes in water properties along the continental slope off central and northern chile |
publishDate |
2013 |
url |
http://hdl.handle.net/10553/9674 https://doi.org/10.7773/cm.v38i1B.1814 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Ciencias Marinas[ISSN 0185-3880],v. 38 (1B), p. 307-332 |
op_relation |
Ciencias Marinas 38 0185-3880 http://hdl.handle.net/10553/9674 doi:10.7773/cm.v38i1B.1814 84859150891 000305593100011 662994 WOS:000305593100011 A-7670-2013 L-5877-2015 L-5815-2014 H-8596-2015 No ID |
op_rights |
by-nc-nd info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.7773/cm.v38i1B.1814 |
container_title |
Ciencias Marinas |
container_volume |
38 |
container_issue |
1B |
container_start_page |
307 |
op_container_end_page |
332 |
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1766231552110362624 |