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Una mezcla turbulenta intensa y generalizada en el Océano Austral

Alberto C Naveira Garabato¹, Kurt L Polzin, Brian A King

¹School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK. a.naveira-garabato@uea.ac.uk

Science (New York, N.Y.)

|January 13, 2004

Resumen

La mezcla turbulenta en el Océano Austral es intensa y generalizada en la topografía áspera. Este proceso es crucial para la circulación oceánica y requiere su inclusión en los modelos oceánicos globales.

Área de la Ciencia:

Oceanografía La oceanografía es la oceanografía.
Dinámica de fluidos La dinámica de fluidos.
La geofísica es la geofísica.

Sus antecedentes:

Las fluctuaciones internas de la velocidad de las olas son indicadores clave de la mezcla de los océanos.
La mezcla turbulenta juega un papel vital en el transporte vertical del océano y la distribución del calor.
La compleja batimetría del Océano Austral influye en los procesos oceanográficos.

Objetivo del estudio:

Para cuantificar la intensidad y extensión espacial de la mezcla turbulenta sobre la topografía áspera en el Océano Austral.
Evaluar la importancia de esta mezcla para la circulación oceánica y el transporte de trazadores.
Para resaltar la necesidad de incorporar estos hallazgos en modelos numéricos del océano.

Principales métodos:

Análisis de las fluctuaciones internas de la velocidad de onda.
Observación de las tasas de mezcla sobre las características batimétricas a gran escala.
Mapeo geoespacial de la intensidad y extensión de la mezcla.

Principales resultados:

Las tasas de mezcla turbulenta mejoradas, de 10 a 1000 veces los niveles de fondo, están muy extendidas en la topografía áspera.
Esta mezcla intensa ocurre a profundidades mayores de 500-1000 metros.
El área afectada se extiende entre 2000 y 3000 kilómetros.

Conclusiones:

La mezcla turbulenta sobre la topografía del Océano Austral es un conductor crítico del transporte acuático ascendente.
Este proceso es esencial para cerrar la circulación meridional del océano.
La representación precisa de esta mezcla es imperativa para la circulación oceánica global y las simulaciones de trazadores biogeoquímicos.

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