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Compensación de flujo observada asociada con el MOC a 26,5 grados N en el Atlántico
Torsten Kanzow1, Stuart A Cunningham, Darren Rayner
1National Oceanography Centre, Empress Dock, Southampton, SO14 3ZH, UK. tok@noc.soton.ac.uk
Science (New York, N.Y.)
|August 19, 2007
Resumen
La circulación de volcado meridional del Atlántico (MOC) muestra una variabilidad significativa, con la densidad y el viento impulsando contribuciones iguales. Los componentes de flujo observados se compensan entre sí en gran medida, validando los métodos de monitoreo.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Ciencias del clima Ciencias del clima Ciencias del clima
- La geofísica es la geofísica.
Sus antecedentes:
- La circulación de volcado meridional del Atlántico (MOC) es crucial para el transporte global de calor, suministrando aproximadamente el 25%.
- La comprensión de la interacción entre sus diversos componentes de flujo y su respuesta al cambio está limitada por la insuficiencia de datos.
Objetivo del estudio:
- Investigar las interacciones dinámicas entre los componentes del MOC.
- Para evaluar la variabilidad del MOC y los conductores detrás de él.
- Validar un enfoque de monitoreo integral para el MOC.
Principales métodos:
- Observación continua de MOC a 26.5°N durante un año.
- Utilizó mediciones de densidad, presión de fondo y corrientes oceánicas en el punto final.
- Mediciones de cables incorporados a través del Estrecho de Florida y datos de esfuerzo eólico.
Principales resultados:
- La variabilidad del MOC observada fue de +/-5.7 x 10^6 m3/s.
- Se encontró que los transportes inferidos por la densidad y los impulsados por el viento contribuyen por igual a las variaciones de MOC.
- Se ha demostrado que los componentes de transporte se autocompensan en gran medida, lo que confirma la validez del enfoque de monitoreo.
- Compensación independiente de la profundidad identificada para el flujo de superficie impulsado por el viento.
Conclusiones:
- El MOC exhibe una variabilidad significativa impulsada por igual por la densidad y el viento.
- Las interacciones de los componentes compensan en gran medida, lo que garantiza la estabilidad del MOC.
- La estrategia de monitoreo empleada captura efectivamente la dinámica del MOC.
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