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El patrón espacial y los mecanismos de cambio del contenido de calor en el Atlántico Norte
M Susan Lozier1, Susan Leadbetter, Richard G Williams
1Division of Earth and Ocean Sciences, Nicholas School of the Environment and Earth Science, Duke University, Durham, NC 27708, USA. mslozier@duke.edu
Science (New York, N.Y.)
|January 5, 2008
Resumen
El Océano Atlántico Norte ganó calor durante más de 50 años, pero se produjo un enfriamiento regional. La variabilidad natural, medida por el índice de oscilación del Atlántico Norte, explica estos cambios en la temperatura del océano.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- Ciencias de la atmósfera Ciencias atmosféricas.
Sus antecedentes:
- El Océano Atlántico Norte ha absorbido un calor significativo en los últimos 50 años.
- El calentamiento de los océanos no es uniforme en todas las regiones.
Objetivo del estudio:
- Para investigar las variaciones regionales en la ganancia de calor del Océano Atlántico Norte.
- Comprender los impulsores de los cambios observados en la temperatura del océano.
Principales métodos:
- Análisis de los datos de flujo de calor en toda la cuenca.
- Examen de los cambios regionales en el flujo de calor superficial.
- Investigaciones modelo que incorporan el viento y el forzamiento de la flotabilidad.
Principales resultados:
- El Océano Atlántico Norte muestra una ganancia de calor en toda la cuenca de 0.4 +/- 0.05 W/m^2.2.
- Los trópicos y subtrópicos se han calentado, mientras que la región subpolar se ha enfriado.
- Los cambios regionales del flujo de calor son significativamente mayores que el promedio de toda la cuenca, explicado por el índice de oscilación del Atlántico Norte.
Conclusiones:
- La variabilidad decenal en el viento y la fuerza de flotabilidad influye significativamente en las temperaturas regionales del océano.
- La fuerte variabilidad natural en el Atlántico Norte puede enmascarar las señales de calentamiento antropogénico.
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