Vertical and horizontal extension of the oxygen minimum zone in the easterns south Pactific Ocean

Recent high-resolution hydrographic measurements (1976-2001) from the eastern South Pacific (ESP) were employed combined with high-resolution data from the World Ocean Circulation Experiment to evaluate the vertical and horizontal extension of the OMZ (oxygen minimum zone, < 20 µmol kg-1) there....

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Autores principales:	Schneider,Wolfgang, Fuenzalida,Rosalino, Garcés-Vargas,José, Bravo,Luis, Lange,Carina
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2006
Materias:	Oxygen minimum zone dissolved oxygen coastal upwelling eastern South Pacific Peru Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000300016
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spelling	oai:scielo:S0717-653820060003000162007-10-30Vertical and horizontal extension of the oxygen minimum zone in the easterns south Pactific OceanSchneider,WolfgangFuenzalida,RosalinoGarcés-Vargas,JoséBravo,LuisLange,Carina Oxygen minimum zone dissolved oxygen coastal upwelling eastern South Pacific Peru Chile Recent high-resolution hydrographic measurements (1976-2001) from the eastern South Pacific (ESP) were employed combined with high-resolution data from the World Ocean Circulation Experiment to evaluate the vertical and horizontal extension of the OMZ (oxygen minimum zone, < 20 µmol kg-1) there. Of the six permanent hypoxic regions in the world oceans, the ESP OMZ is volumetrically the fourth largest, occupying 2.74 x 10(6) km³ and accounting for ~11% globally. Examples of variability in the vertical position of the OMZ in the water-column and also in its intensity offshore central Chile will be addressed. We conclude that the OMZ in the ESP is partly based on old, low-oxygen waters from intermediate depths of the North Pacific Ocean, which were further depleted of oxygen off Mexico and Peru, advected into the region along the eastern Pacific coast. Coastal upwelling zones along the eastern Pacific combined with general circulation thus might provide a mechanism that allows the renewal of upper Pacific Deep Water, the oxygen poorest and oldest water mass of the world oceans.info:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.70 suppl.1 20062006-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000300016en10.4067/S0717-65382006000300016
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Oxygen minimum zone dissolved oxygen coastal upwelling eastern South Pacific Peru Chile
spellingShingle	Oxygen minimum zone dissolved oxygen coastal upwelling eastern South Pacific Peru Chile Schneider,Wolfgang Fuenzalida,Rosalino Garcés-Vargas,José Bravo,Luis Lange,Carina Vertical and horizontal extension of the oxygen minimum zone in the easterns south Pactific Ocean
description	Recent high-resolution hydrographic measurements (1976-2001) from the eastern South Pacific (ESP) were employed combined with high-resolution data from the World Ocean Circulation Experiment to evaluate the vertical and horizontal extension of the OMZ (oxygen minimum zone, < 20 µmol kg-1) there. Of the six permanent hypoxic regions in the world oceans, the ESP OMZ is volumetrically the fourth largest, occupying 2.74 x 10(6) km³ and accounting for ~11% globally. Examples of variability in the vertical position of the OMZ in the water-column and also in its intensity offshore central Chile will be addressed. We conclude that the OMZ in the ESP is partly based on old, low-oxygen waters from intermediate depths of the North Pacific Ocean, which were further depleted of oxygen off Mexico and Peru, advected into the region along the eastern Pacific coast. Coastal upwelling zones along the eastern Pacific combined with general circulation thus might provide a mechanism that allows the renewal of upper Pacific Deep Water, the oxygen poorest and oldest water mass of the world oceans.
author	Schneider,Wolfgang Fuenzalida,Rosalino Garcés-Vargas,José Bravo,Luis Lange,Carina
author_facet	Schneider,Wolfgang Fuenzalida,Rosalino Garcés-Vargas,José Bravo,Luis Lange,Carina
author_sort	Schneider,Wolfgang
title	Vertical and horizontal extension of the oxygen minimum zone in the easterns south Pactific Ocean
title_short	Vertical and horizontal extension of the oxygen minimum zone in the easterns south Pactific Ocean
title_full	Vertical and horizontal extension of the oxygen minimum zone in the easterns south Pactific Ocean
title_fullStr	Vertical and horizontal extension of the oxygen minimum zone in the easterns south Pactific Ocean
title_full_unstemmed	Vertical and horizontal extension of the oxygen minimum zone in the easterns south Pactific Ocean
title_sort	vertical and horizontal extension of the oxygen minimum zone in the easterns south pactific ocean
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000300016
work_keys_str_mv	AT schneiderwolfgang verticalandhorizontalextensionoftheoxygenminimumzoneintheeasternssouthpactificocean AT fuenzalidarosalino verticalandhorizontalextensionoftheoxygenminimumzoneintheeasternssouthpactificocean AT garcesvargasjose verticalandhorizontalextensionoftheoxygenminimumzoneintheeasternssouthpactificocean AT bravoluis verticalandhorizontalextensionoftheoxygenminimumzoneintheeasternssouthpactificocean AT langecarina verticalandhorizontalextensionoftheoxygenminimumzoneintheeasternssouthpactificocean
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Vertical and horizontal extension of the oxygen minimum zone in the easterns south Pactific Ocean

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