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| Provedor de dados: |
72
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| País: |
Chile
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| Título: |
Vertical and horizontal extension of the oxygen minimum zone in the easterns south Pactific Ocean
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| Autores: |
Schneider,Wolfgang
Fuenzalida,Rosalino
Garcés-Vargas,José
Bravo,Luis
Lange,Carina
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| Data: |
2006-10-01
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| Ano: |
2006
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| Palavras-chave: |
Oxygen minimum zone
Dissolved oxygen
Coastal upwelling
Eastern South Pacific
Peru
Chile
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| Resumo: |
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.
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| Tipo: |
Journal article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000300016
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| Editor: |
Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
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| Formato: |
text/html
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| Fonte: |
Gayana (Concepción) v.70 suppl.1 2006
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