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Evidencia observacional de una bomba de calor oceánica inducida por ciclones tropicales
1Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana 47907, USA.
Nature
|June 1, 2007
Resumen
Los ciclones tropicales enfrían significativamente los océanos tropicales e impulsan la mezcla vertical. Este proceso representa alrededor del 15% del pico de transporte de calor oceánico, lo que afecta a los modelos climáticos globales.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Ciencias del clima Ciencias del clima Ciencias del clima
- Biología Marina Biología Marina.
Sus antecedentes:
- La mezcla de los océanos es crucial para la regulación climática global y los ecosistemas marinos, ya que influye en el transporte de calor y nutrientes.
- Las mediciones directas de la mezcla de los océanos son más bajas que las tasas inferidas en el presupuesto, lo que sugiere procesos de mezcla no cuantificados.
- Se sabe que los ciclones tropicales causan mezcla de océanos localizados, pero su impacto a escala global sigue sin ser probado.
Objetivo del estudio:
- Para probar la hipótesis de que los ciclones tropicales son significativos agentes de mezcla de océanos a escala global.
- Para cuantificar la mezcla vertical inducida por la actividad de los ciclones tropicales.
- Evaluar la contribución de la mezcla inducida por ciclones tropicales al transporte de calor oceánico.
Principales métodos:
- Comparación de las temperaturas de la superficie del mar antes y después del paso del ciclón tropical.
- Cálculo de la mezcla vertical basado en los cambios de temperatura observados.
- Estimando la contribución de esta mezcla al transporte de calor hacia los polos.
Principales resultados:
- Los ciclones tropicales causan un enfriamiento significativo y una mezcla vertical en los océanos de superficie tropicales.
- Aproximadamente el 15% del pico de transporte de calor oceánico se atribuye a la mezcla inducida por ciclones tropicales.
- La magnitud de la mezcla está fuertemente correlacionada con la temperatura de la superficie del mar.
Conclusiones:
- Los ciclones tropicales son importantes impulsores de la mezcla de los océanos y el transporte de calor a nivel mundial.
- Los cambios futuros en las temperaturas de la superficie del mar pueden alterar la circulación oceánica y el transporte de calor de maneras que no son capturadas por los modelos climáticos actuales.
- Incorporar los impactos de los ciclones tropicales es esencial para las proyecciones climáticas precisas.
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