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El derrumbe del océano profundo en forma de distribución del fondo marino

C de Lavergne^1,2, G Madec², F Roquet³

¹School of Mathematics and Statistics, University of New South Wales, Sydney, New South Wales 2052, Australia.

|November 10, 2017

Resumen

El océano abisal

Área de la Ciencia:

La oceanografía
Ciencias del clima
La geofísica

Sus antecedentes:

El océano abisal exhibe flujos de agua distintos hacia el norte y el sur, cruciales para el calor global y el almacenamiento de carbono.
La fuerza y la estructura de la circulación abisales son vitales para comprender la regulación climática a largo plazo.

Objetivo del estudio:

Investigar los factores de control de la fuerza y la estructura de la circulación de volcado abisal.
Para determinar cómo la topografía del fondo marino influye en el transporte de masa de agua interhemisférica.

Principales métodos:

Análisis de la distribución de la profundidad del fondo marino al norte de 32° S.
Interpretación de las mediciones históricas de radiocarbono.
Modelado de patrones de flujo de agua abisal.

Principales resultados:

La topografía del fondo marino al norte de 32° S dirige las densas aguas de origen sur hacia el norte por debajo de 4 km.
El flujo de retorno de estas aguas se produce predominantemente por encima de 2,5 km.
Las profundidades medias (1-2,5 km) muestran un flujo meridional medio débil sin ventilación norte.

Conclusiones:

La geometría de las cuencas oceánicas restringe significativamente la circulación de volteo abisal.
La topografía del fondo marino es el principal impulsor de las vías y el almacenamiento de masas de agua abisal.

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