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La transferencia indio-atlántica de agua de la termoclina en la retroflexión de las agujas
Resumen
Dos remolinos anticiclónicos observados cerca de Sudáfrica indican un importante flujo de agua del Océano Índico hacia el Atlántico. Este intercambio oceanográfico probablemente influye en los patrones climáticos globales a través de la transferencia de calor.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- La geofísica es la geofísica.
Sus antecedentes:
- Los remolinos anticiclónicos se observan al oeste de la retroflexión de Agulhas.
- Estos remolinos parecen haber sido generados en la retroflexión.
- Un remolino occidental, al suroeste de Ciudad del Cabo, exhibe un núcleo enfriado rodeado de agua cálida del Océano Índico.
Objetivo del estudio:
- Investigar la ocurrencia y las implicaciones del transporte de agua de termoclina del Océano Índico en el Atlántico Sur.
- Evaluar el impacto potencial de este intercambio interoceánico en los patrones climáticos globales.
Principales métodos:
- Estudio de observación durante noviembre-diciembre de 1983.
- Análisis del transporte geostrófico y las propiedades del agua.
Principales resultados:
- Se midió un transporte geostrófico neto de agua de termoclina del Océano Índico (14 x 10^6 m^3/s) hacia el Atlántico Sur.
- Se sugiere que este intercambio de termoclinas indio-atlántico es un fenómeno común.
- La afluencia de agua más cálida del Océano Índico representa una entrada de calor significativa (2,3 x 1013 a 47 x 1013 vatios) en el Atlántico.
Conclusiones:
- El intercambio de masa y calor interoceánico en la retroflexión de Agulhas es una probabilidad clara.
- Este intercambio influye significativamente en los patrones climáticos globales.
- Existe incertidumbre con respecto a las vías de flujo de retorno (agua de termoclina del Atlántico Sur frente a agua profunda del Atlántico Norte).
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