The Eocene-Oligocene boundary climate transition: An Antarctic perspective
Antarctica underwent a complex evolution over the course of the Cenozoic, which influenced the history of the Earth’s climate system. The Eocene-Oligocene boundary is a divide of this history when the ice-free ‘greenhouse world’ transitioned to the ‘icehouse’ with the glaciation of Antarctica. Prior...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/425132 2023-07-23T04:14:52+02:00 The Eocene-Oligocene boundary climate transition: An Antarctic perspective Galeotti, Simone Bijl, Peter Brinkuis, Henk M. DeConto, Robert Escutia, Carlota Florindo, Fabio G.W. Gasson, Edward Francis, Jane Hutchinson, David Kennedy-Asser, Alan Lanci, Luca Sauermilch, Isabel Sluijs, Appy Stocchi, Paolo SIegert, Martin De Santis, Laura Naish, Tim Marine palynology and palaeoceanography Marine Palynology 2021 application/pdf https://dspace.library.uu.nl/handle/1874/425132 en eng https://dspace.library.uu.nl/handle/1874/425132 info:eu-repo/semantics/OpenAccess Antarctica atmospheric CO Eocene-Oligocene boundary glaciation ocean gateway Taverne Earth and Planetary Sciences(all) Part of book 2021 ftunivutrecht 2023-07-02T03:50:04Z Antarctica underwent a complex evolution over the course of the Cenozoic, which influenced the history of the Earth’s climate system. The Eocene-Oligocene boundary is a divide of this history when the ice-free ‘greenhouse world’ transitioned to the ‘icehouse’ with the glaciation of Antarctica. Prior to this, Antarctica experienced warm climates, peaking during Early Eocene when tropical-like conditions existed at the margins of the continent where geological evidence is present. Climate signals in the geological record show that the climate then cooled, but not enough to allow the existence of significant ice until the latest Eocene. Glacial deposits from several areas around the continental margin indicate that ice was present by the earliest Oligocene. This matches the major oxygen isotope positive shift captured by marine records. On land, vegetation was able to persist, but the thermophylic plants of the Eocene were replaced by shrubby vegetation with the southern beech Nothofagus, mosses and ferns, which survived in tundra-like conditions. Coupled climate–ice sheet modelling indicates that changing levels of atmospheric CO2 controlled Antarctica’s climate and the onset of glaciation. Factors such as mountain uplift, vegetation changes, ocean gateway opening and orbital forcing all played a part in cooling the polar climate, but only when CO2 levels reached critical thresholds was Antarctica tipped into an icy glacial world. Book Part Antarc* Antarctic Antarctica Ice Sheet Tundra Utrecht University Repository Antarctic |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Antarctica atmospheric CO Eocene-Oligocene boundary glaciation ocean gateway Taverne Earth and Planetary Sciences(all) |
spellingShingle |
Antarctica atmospheric CO Eocene-Oligocene boundary glaciation ocean gateway Taverne Earth and Planetary Sciences(all) Galeotti, Simone Bijl, Peter Brinkuis, Henk M. DeConto, Robert Escutia, Carlota Florindo, Fabio G.W. Gasson, Edward Francis, Jane Hutchinson, David Kennedy-Asser, Alan Lanci, Luca Sauermilch, Isabel Sluijs, Appy Stocchi, Paolo SIegert, Martin De Santis, Laura Naish, Tim The Eocene-Oligocene boundary climate transition: An Antarctic perspective |
topic_facet |
Antarctica atmospheric CO Eocene-Oligocene boundary glaciation ocean gateway Taverne Earth and Planetary Sciences(all) |
description |
Antarctica underwent a complex evolution over the course of the Cenozoic, which influenced the history of the Earth’s climate system. The Eocene-Oligocene boundary is a divide of this history when the ice-free ‘greenhouse world’ transitioned to the ‘icehouse’ with the glaciation of Antarctica. Prior to this, Antarctica experienced warm climates, peaking during Early Eocene when tropical-like conditions existed at the margins of the continent where geological evidence is present. Climate signals in the geological record show that the climate then cooled, but not enough to allow the existence of significant ice until the latest Eocene. Glacial deposits from several areas around the continental margin indicate that ice was present by the earliest Oligocene. This matches the major oxygen isotope positive shift captured by marine records. On land, vegetation was able to persist, but the thermophylic plants of the Eocene were replaced by shrubby vegetation with the southern beech Nothofagus, mosses and ferns, which survived in tundra-like conditions. Coupled climate–ice sheet modelling indicates that changing levels of atmospheric CO2 controlled Antarctica’s climate and the onset of glaciation. Factors such as mountain uplift, vegetation changes, ocean gateway opening and orbital forcing all played a part in cooling the polar climate, but only when CO2 levels reached critical thresholds was Antarctica tipped into an icy glacial world. |
author2 |
Marine palynology and palaeoceanography Marine Palynology |
format |
Book Part |
author |
Galeotti, Simone Bijl, Peter Brinkuis, Henk M. DeConto, Robert Escutia, Carlota Florindo, Fabio G.W. Gasson, Edward Francis, Jane Hutchinson, David Kennedy-Asser, Alan Lanci, Luca Sauermilch, Isabel Sluijs, Appy Stocchi, Paolo SIegert, Martin De Santis, Laura Naish, Tim |
author_facet |
Galeotti, Simone Bijl, Peter Brinkuis, Henk M. DeConto, Robert Escutia, Carlota Florindo, Fabio G.W. Gasson, Edward Francis, Jane Hutchinson, David Kennedy-Asser, Alan Lanci, Luca Sauermilch, Isabel Sluijs, Appy Stocchi, Paolo SIegert, Martin De Santis, Laura Naish, Tim |
author_sort |
Galeotti, Simone |
title |
The Eocene-Oligocene boundary climate transition: An Antarctic perspective |
title_short |
The Eocene-Oligocene boundary climate transition: An Antarctic perspective |
title_full |
The Eocene-Oligocene boundary climate transition: An Antarctic perspective |
title_fullStr |
The Eocene-Oligocene boundary climate transition: An Antarctic perspective |
title_full_unstemmed |
The Eocene-Oligocene boundary climate transition: An Antarctic perspective |
title_sort |
eocene-oligocene boundary climate transition: an antarctic perspective |
publishDate |
2021 |
url |
https://dspace.library.uu.nl/handle/1874/425132 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Tundra |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Tundra |
op_relation |
https://dspace.library.uu.nl/handle/1874/425132 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772188042069540864 |