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Vínculos entre el clima y los niveles del mar durante los últimos tres millones de años
Kurt Lambeck1, Tezer M Esat, Emma-Kate Potter
1Research School of Earth Sciences, Australian National University, Canberra 0200, Australia.
Nature
|September 13, 2002
Resumen
La Tierra La Tierra La Tierra La Tierra La Tierra
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Oceanografía La oceanografía es la oceanografía.
- Glaciología glaciología.
Sus antecedentes:
- El clima de la Tierra ha oscilado entre períodos glaciales e interglaciales durante millones de años.
- Estos cambios climáticos implican transferencias masivas de agua entre las capas de hielo y los océanos.
Objetivo del estudio:
- Para analizar los cambios en el nivel del mar después del último máximo glacial.
- Comprender las complejas interacciones que impulsan las rápidas fluctuaciones del nivel del mar.
Principales métodos:
- Análisis de los datos paleoclimáticos.
- Reconstrucción de la capa de hielo y los cambios en el volumen de los océanos.
- Modelado de las interacciones del sistema terrestre.
Principales resultados:
- Aproximadamente 50 millones de kilómetros cúbicos de hielo se han derretido desde el último máximo glacial.
- El nivel global del mar subió unos 130 metros debido a este derretimiento.
- Las complejas interacciones entre la atmósfera, los océanos, las capas de hielo y la Tierra sólida influyen en los cambios del nivel del mar.
Conclusiones:
- El forzamiento astronómico (cambios en la insolación) probablemente desencadena fluctuaciones en el nivel del mar.
- Los ciclos de retroalimentación interna dentro de los sistemas de la Tierra complican la relación directa de causa y efecto.
- Los rápidos cambios en el nivel del mar son el resultado de la intrincada dinámica del sistema terrestre.
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