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Mejoras en las estimaciones de la circulación oceánica global, el transporte de calor y la mezcla a partir de datos
1MIT, Cambridge, Massachusetts 02139, USA. ganacho@ifremer.fr
Nature
|December 2, 2000
Resumen
El océano regula el clima transportando calor y nutrientes. Nuevos datos y modelos revelan patrones de circulación oceánica global y mezcla vertical, proporcionando una referencia crucial para los estudios del cambio climático.
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:
- El océano juega un papel vital en la regulación del clima global a través del calor, el agua dulce y el transporte de nutrientes.
- Comprender las vías, los mecanismos y la estabilidad de la circulación oceánica es fundamental para evaluar los estados climáticos actuales y los cambios futuros.
- El World Ocean Circulation Experiment (WOCE) ha proporcionado recientemente datos hidrográficos globales de alta calidad para mapear la actual circulación oceánica.
Objetivo del estudio:
- Para mejorar las estimaciones de la circulación oceánica global y los flujos de calor.
- Para resolver la mezcla vertical global a través de las superficies isopicnales.
- Establecer un nuevo estado de referencia para los estudios climáticos con incertidumbres cuantificadas.
Principales métodos:
- Integración de datos hidrográficos transoceánicos de alta resolución de WOCE.
- Utilización de los datos actuales de los medidores, campos de viento climatológicos y equilibrios biogeoquímicos.
- Aplicación de un modelo inverso con mejores estimaciones de error a priori.
Principales resultados:
- Los coeficientes globales de mezcla vertical se resolvieron en el rango de (3-12) x 10(-4) m2 s(-1).
- Las tasas netas de producción en aguas profundas se estimaron en (15 +/- 12) x 10 ((6) m3 s ((-1) en el Atlántico Norte.
- Las tasas netas de producción en aguas profundas se estimaron en (21 +/- 6) x 10 ((6) m3 s ((-1) en el Océano Austral.
Conclusiones:
- El estudio proporciona estimaciones mejoradas de la circulación oceánica global y los flujos de calor.
- Los hallazgos ofrecen un nuevo estado de referencia rigurosamente cuantificado para futuras investigaciones climáticas.
- La mezcla vertical resuelta y las tasas de producción en aguas profundas mejoran nuestra comprensión del papel del océano en la regulación del clima.
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