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Los cambios recientes en la Corriente del Golfo están causando una desestabilización generalizada de los hidratos de
Benjamin J Phrampus1, Matthew J Hornbach
1Huffington Department of Earth Sciences, Southern Methodist University, Dallas, Texas 75275, USA. bphrampus@mail.smu.edu
Nature
|October 27, 2012
Resumen
La Corriente del Golfo es la corriente del Golfo.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- Geología Geología Geología.
Sus antecedentes:
- La Corriente del Golfo influye en el clima del hemisferio norte al transportar agua caliente.
- El cambio de las corrientes oceánicas puede desestabilizar los hidratos de metano del fondo marino, arriesgando la liberación de metano.
- No se comprende bien el impacto de los cambios de la Corriente del Golfo en la estabilidad del hidrato de metano.
Objetivo del estudio:
- Para investigar el impacto de los recientes cambios de la Corriente del Golfo en la estabilidad del hidrato de metano.
- Para cuantificar el alcance y la velocidad de la desestabilización del hidrato de metano.
- Para evaluar las posibles implicaciones climáticas de la liberación de metano.
Principales métodos:
- Análisis de datos sísmicos. análisis de datos sísmicos.
- Aplicación de modelos térmicos.
- Investigación de los cambios de temperatura del océano.
Principales resultados:
- El reciente calentamiento oceánico asociado a la Corriente del Golfo está desestabilizando rápidamente el hidrato de metano en el margen de América del Norte.
- Un calentamiento de hasta 8°C ha desestabilizado 2,5 gigatoneladas de hidrato de metano a lo largo de cientos de kilómetros del margen.
- La desestabilización se está produciendo en al menos 10.000 kilómetros cuadrados, con el potencial de continuar la liberación durante siglos.
Conclusiones:
- Los recientes cambios de temperatura de la Corriente del Golfo están desestabilizando activamente las importantes reservas de hidrato de metano.
- Esta desestabilización plantea un riesgo de liberación de metano y posibles impactos climáticos.
- La desestabilización global del hidrato de metano puede estar más extendida de lo que se estima actualmente.
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