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Mecanismos oceánicos para la amplificación del ciclo de volumen de hielo de 23.000 años
Science (New York, N.Y.)
|May 8, 1981
Resumen
El Océano Atlántico Norte influye en el clima al afectar las capas de hielo, las temperaturas del océano y el nivel del mar. Las retroalimentaciones oceánicas amplifican los ciclos glaciales, impactando la historia climática de la Tierra durante más de 250.000 años.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Oceanografía La oceanografía es la oceanografía.
- Glaciología glaciología.
Sus antecedentes:
- La latitud media del Océano Atlántico Norte es adyacente a las principales capas de hielo del hemisferio norte.
- Actúa como una fuente de humedad, corredor de tormentas e interactúa con las masas de hielo continental.
Objetivo del estudio:
- Para resumir la evidencia de las interacciones entre el hielo del Atlántico Norte, el océano y el aire en los últimos 250.000 años.
- Para investigar las retroalimentaciones que amplifican los ciclos glaciales.
Principales métodos:
- Revisión de la evidencia para las interacciones hielo-oceano-aire.
- Análisis de datos espectrales para identificar los mecanismos de retroalimentación.
Principales resultados:
- La salida de los icebergs y el agua de deshielo afectan las temperaturas del océano, el hielo marino y el nivel del mar.
- Las respuestas oceánicas influyen en el flujo de humedad a las capas de hielo y la ablación del hielo terrestre.
- Las retroalimentaciones oceánicas amplifican el forzamiento de Milankovitch en el ciclo de 23.000 años.
Conclusiones:
- El Atlántico Norte juega un papel crítico en la historia climática de la Tierra a través de las interacciones hielo-oceano-aire.
- Las retroalimentaciones oceánicas amplifican los ciclos glaciales, lo que demuestra una respuesta compleja del sistema climático.
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