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Cambios en el nivel del mar durante el último ciclo glacial
1Research School of Earth Sciences, The Australian National University, Canberra 0200, Australia.
Science (New York, N.Y.)
|April 28, 2001
Resumen
Los cambios cuaternarios del nivel del mar, impulsados por los ciclos de las capas de hielo, revelan variaciones en la masa de hielo y respuestas del manto. Estos conocimientos ayudan a predecir los desplazamientos de la costa durante los ciclos glaciales.
Área de la Ciencia:
- Paleoceanografía y Glaciología.
- Tierra sólida Geofísica Geofísica de la Tierra sólida
Sus antecedentes:
- Las fluctuaciones cuaternarias del nivel del mar son impulsadas principalmente por el crecimiento cíclico y la desintegración de las capas de hielo de la Tierra.
- Estos cambios crean patrones espaciales y temporales complejos que influyen en las costas globales.
Objetivo del estudio:
- Para limitar el tiempo, las tasas y las magnitudes de los cambios en la masa de hielo durante los ciclos glaciales.
- Para entender la distribución de la masa de hielo entre las principales capas de hielo.
- Para investigar la respuesta del manto a la carga de la superficie glacial en escalas de tiempo geológicas.
Principales métodos:
- Análisis de los datos de observación sobre los cambios en el nivel del mar inducidos por la glaciación.
- Análisis regionales de la función de respuesta de la tierra para comprender el comportamiento del manto.
- Desarrollo de modelos integrales de cambio del nivel del mar.
Principales resultados:
- La variabilidad del nivel del mar proporciona datos críticos sobre la dinámica de la capa de hielo y el balance de masas.
- La respuesta del manto a la carga superficial es a la vez dependiente de la profundidad y espacialmente variable.
- Los modelos pueden predecir la migración de la costa durante los ciclos glaciales.
Conclusiones:
- Comprender los cambios del nivel del mar en el pasado es crucial para predecir la dinámica costera futura.
- Los ciclos glaciales impactan significativamente las capas de hielo, el manto y las costas de la Tierra.
- Modelado integral ayuda en la reconstrucción del pasado y la predicción de futuros escenarios del nivel del mar.
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