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Una gran capa de hielo de la Antártida Occidental explica la amplitud del nivel del mar del Neogeno temprano

J W Marschalek¹, L Zurli², F Talarico²

¹Department of Earth Science and Engineering, Imperial College London, London, UK. j.marschalek18@imperial.ac.uk.

|December 16, 2021

Resumen

La evidencia geológica del Mioceno temprano revela una gran capa de hielo de la Antártida Occidental (WAIS) expandida a través de la plataforma continental del Mar de Ross. Este hallazgo concilia los datos del nivel del mar con los modelos de las capas de hielo, lo que indica un punto de inflexión crítico en la evolución del hielo antártico.

Área de la Ciencia:

Paleoclimatología
Glaciología
Geología marina

Sus antecedentes:

Se debaten las fluctuaciones del nivel del mar de principios a mediados del Mioceno (~ 40-60 m), y algunos estudios sugieren una pérdida casi completa de hielo en la Antártida Oriental durante los períodos cálidos.
Sin embargo, los modelos de las capas de hielo indican una retención significativa del hielo de la Antártida Oriental incluso durante los intervalos más cálidos del Mioceno Medio.
Para conciliar estas interpretaciones contrastantes se requiere tener en cuenta los volúmenes sustanciales de hielo de otras regiones antárticas.

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