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Fecha
2022-09-21
Derechos de acceso
info:eu-repo/semantics/openAccess
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Editorial
Springer Nature
Citas
Resumen
The Antarctic continent reached its current polar location ~83 Ma and became shrouded by ice sheets ~34 Ma, coincident with dramatic global cooling at the Eocene-Oligocene boundary. However, it is not known whether the first Antarctic glaciers formed immediately prior to this or were present significantly earlier. Here we show that mountain glaciers were likely present in the Transantarctic Mountains during the Late Palaeocene (~60–56 Ma) and middle Eocene (~48–40 Ma). Temperate (warm-based) glaciers were prevalent during the Late Eocene (~40–34 Ma) and, in reduced numbers, during the Oligocene (~34–23 Ma), before larger, likely cold-based, ice masses (including ice sheets) dominated. Some temperate mountain glaciers were present during the Miocene Climatic Optimum (~15 Ma), before a widespread switch to cold-based glaciation. Our findings highlight the longevity of glaciation in Antarctica and suggest that glaciers were present even during the Early-Cenozoic greenhouse world.
Descripción
La versión registrada de este artículo, publicado por primera vez en Nature Communications 13, 5526 (2022), está disponible en línea en el sitio web del editor: https://doi.org/10.1038/s41467-022-33310-z.
The registered version of this article, first published in Nature Communications 13, 5526 (2022), is available online from the publisher's website: https://doi.org/10.1038/s41467-022-33310-z.
Categorías UNESCO
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Citación
Barr, I.D., Spagnolo, M., Rea, B.R. et al. 60 million years of glaciation in the Transantarctic Mountains. Nat Commun 13, 5526 (2022). https://doi.org/10.1038/s41467-022-33310-z.
Centro
Facultad de Geografía e Historia
Departamento
Geografía