Resumen
The distribution of oxygen in an area of the South Atlantic Ocean has been studied. The area is limited by the Argentinian continental slope and the 45º W meridian and from 35º S to 47º S. The distribution of oxygen in studied in relation with the salinity distribution in seven horizontal levels and one vertical profile. The oxygen distribution in the area of the Subtropical Convergence has a characteristic pattern that seems to be very useful in the determination of the Convergence. The Subtropical Convergence was situated between the oceanographic station where was found the maximum salinity and the maximum oxygen (negative) horizontal gradients. The maximum fluctuation of the Subtropical Convergence area is situated immediately East of Malvinas Current, where its desplacement N-S between winter and spring is, at least, 200 nautical miles. The water sunk at the Subtropical Convergence can be followed by its oxygen content. The intermediate maximum of oxygen is not coincident with the depth of salinity minimum characteristic of the núcleos of S. A. waters. A hipothesis to explain this is given.
Distribución del oxígeno disuelto en la zona oeste de la Convergencia Subtropical del Atlantico Sud
Mariano Javier Pizarro* * Dirección actual: Estación de Biologia Marina de Montemar - Casilla 13-D, Viña del Mar, Chile.
SYNOPSIS
The distribution of oxygen in an area of the South Atlantic Ocean has been studied. The area is limited by the Argentinian continental slope and the 45º W meridian and from 35º S to 47º S. The distribution of oxygen in studied in relation with the salinity distribution in seven horizontal levels and one vertical profile. The oxygen distribution in the area of the Subtropical Convergence has a characteristic pattern that seems to be very useful in the determination of the Convergence.
The Subtropical Convergence was situated between the oceanographic station where was found the maximum salinity and the maximum oxygen (negative) horizontal gradients. The maximum fluctuation of the Subtropical Convergence area is situated immediately East of Malvinas Current, where its desplacement N-S between winter and spring is, at least, 200 nautical miles.
The water sunk at the Subtropical Convergence can be followed by its oxygen content. The intermediate maximum of oxygen is not coincident with the depth of salinity minimum characteristic of the núcleos of S. A. waters. A hipothesis to explain this is given.
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AGRADECIMIENTO
Queremos dejar sentado nuestro agradecimiento al Prof. Dr. NICANOR MENENDEZ GARCÍA, por sus sugerencias y consejos que fueron fundamentales para la elaboración de este trabajo.
Agradecemos también a los señores Salanouve, Morales y D'Anunzio por la preparación de las tablas de valores y gráficos.
BIBLIOGRAFIA
(Recebido en 24/5/1967)
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- BRASIL. MINISTÉRIO DA MARINHA. DIRETORIA DE HIDROGRAFIA E NAVEGAÇÃO. 1963b. Operação oceanográfica Tridente II. D.H.N.-DG-06-XVI.
- CAPURRO, L. R. A. 1955. Expediciones oceanográficas actuales en el Mar Epicontinental Argentino. Argentina, Direcc. gen. Nav. Hidr.
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- FUGLISTER, F. C. 1960. Atlantic Ocean atlas of temperature and salinity profiles and data from the International Geophysical Year of 1957-1958. Woods Hole oceanogr. Instn Atlas Ser., vol. 1, 209 p.
- LUSQUIÑOS, A. 1966. Determinación de la Convergence Subtropical sobre la base de los datos de temperatura y salinidad obtenidos en las Campañas Tridente I y II. Boln Serv. Hidr. Naval, vol 3, n.ş 2, p. 79-98.
- MENÉNDEZ, N. & PIZARRO, M. J. 1965. Study of the oceanographic structure along the 30ş W meridian in the south Atlantic. Anais Acad. bras. Ciênc., vol. 37, supl., p. 95-108.
- SAYED, Z. EL-SAYED 1964. Primary production and standing crop of phytoplankton along the Argentinian coast, Drake Passage and Brandfield Strait. Texas A & M University, ref. n.ş 64-9A, p. 1-76.
- TRUESDALE, G. A. DOWNING, A. L. & LOWDEB, G. F. 1955. Determination of the solubility of the oxygen in fresh water and sea water. J. appl. Chem. Lond., vol. 5, p. 53-59.
- WÜST, G. 1936. Die Strastophäre des Atlantischen Ozeans. Deutsche Atlantische Expedition 'Meteor', 1925-1927. Wiss. Ergebn. dt. atlant. Exped. 'Meteor', vol. 6. p. 163.
Fechas de Publicación
-
Publicación en esta colección
14 Jun 2012 -
Fecha del número
1967
Histórico
-
Recibido
24 Mayo 1967
