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Colapso de las capas de hielo polar durante la etapa 11 interglacial
Maureen E Raymo1, Jerry X Mitrovica
1Lamont-Doherty Earth Observatory, Columbia University, PO Box 1000, 61 Route 9W, Palisades, New York 10964, USA. raymo@ldeo.columbia.edu
Nature
|March 16, 2012
Resumen
Los niveles del mar del Pleistoceno no eran tan altos como se pensaba anteriormente. Un nuevo análisis sugiere que las capas de hielo de Groenlandia y la Antártida Occidental se derrumbaron hace 400.000 años, mientras que la capa de hielo de la Antártida Oriental se mantuvo estable.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Geología Cuaternaria Geología Cuaternaria
- Reconstrucción del nivel del mar Reconstrucción del nivel del mar
Sus antecedentes:
- Las características de la costa del Pleistoceno en las Bermudas y las Bahamas sugieren que los niveles del mar son más de 20 metros más altos que hoy hace 400.000 años.
- Estas características se atribuyen a la Etapa de Isótopos Marinos (MIS) 11, un período prolongado de calor durante la edad de hielo.
- Las hipótesis anteriores proponían un derretimiento significativo de las capas de hielo o un mega-tsunami como la causa.
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