Antarctic Climate History and Global Climate Changes
Antarctic climate changes have been reconstructed from ice and sediment cores and numerical models (which also predict future changes). Major ice sheets first appeared 34 million years ago (Ma) and fluctuated throughout the Oligocene, with an overall cooling trend. Ice volume more than doubled at th...
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ftingv:oai:www.earth-prints.org:2122/11543 2023-05-15T14:01:37+02:00 Antarctic Climate History and Global Climate Changes Lurcock, Pontus Conrad Florindo, Fabio #PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione AC, Roma, Italia 2017 http://hdl.handle.net/2122/11543 https://doi.org/10.1093/oxfordhb/9780190699420.013.18 en eng Oxford University Press 1 http://hdl.handle.net/2122/11543 doi:10.1093/oxfordhb/9780190699420.013.18 open article 2017 ftingv https://doi.org/10.1093/oxfordhb/9780190699420.013.18 2022-07-29T06:07:26Z Antarctic climate changes have been reconstructed from ice and sediment cores and numerical models (which also predict future changes). Major ice sheets first appeared 34 million years ago (Ma) and fluctuated throughout the Oligocene, with an overall cooling trend. Ice volume more than doubled at the Oligocene-Miocene boundary. Fluctuating Miocene temperatures peaked at 17–14 Ma, followed by dramatic cooling. Cooling continued through the Pliocene and Pleistocene, with another major glacial expansion at 3–2 Ma. Several interacting drivers control Antarctic climate. On timescales of 10,000– 100,000 years, insolation varies with orbital cycles, causing periodic climate variations. Opening of Southern Ocean gateways produced a circumpolar current that thermally isolated Antarctica. Declining atmospheric CO2 triggered Cenozoic glaciation. Antarctic glaciations affect global climate by lowering sea level, intensifying atmospheric circulation, and increasing planetary albedo. Ice sheets interact with ocean water, forming water masses that play a key role in global ocean circulation. Published 5A. Paleoclima e ricerche polari N/A or not JCR Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic Southern Ocean |
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Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
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language |
English |
description |
Antarctic climate changes have been reconstructed from ice and sediment cores and numerical models (which also predict future changes). Major ice sheets first appeared 34 million years ago (Ma) and fluctuated throughout the Oligocene, with an overall cooling trend. Ice volume more than doubled at the Oligocene-Miocene boundary. Fluctuating Miocene temperatures peaked at 17–14 Ma, followed by dramatic cooling. Cooling continued through the Pliocene and Pleistocene, with another major glacial expansion at 3–2 Ma. Several interacting drivers control Antarctic climate. On timescales of 10,000– 100,000 years, insolation varies with orbital cycles, causing periodic climate variations. Opening of Southern Ocean gateways produced a circumpolar current that thermally isolated Antarctica. Declining atmospheric CO2 triggered Cenozoic glaciation. Antarctic glaciations affect global climate by lowering sea level, intensifying atmospheric circulation, and increasing planetary albedo. Ice sheets interact with ocean water, forming water masses that play a key role in global ocean circulation. Published 5A. Paleoclima e ricerche polari N/A or not JCR |
author2 |
#PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione AC, Roma, Italia |
format |
Article in Journal/Newspaper |
author |
Lurcock, Pontus Conrad Florindo, Fabio |
spellingShingle |
Lurcock, Pontus Conrad Florindo, Fabio Antarctic Climate History and Global Climate Changes |
author_facet |
Lurcock, Pontus Conrad Florindo, Fabio |
author_sort |
Lurcock, Pontus Conrad |
title |
Antarctic Climate History and Global Climate Changes |
title_short |
Antarctic Climate History and Global Climate Changes |
title_full |
Antarctic Climate History and Global Climate Changes |
title_fullStr |
Antarctic Climate History and Global Climate Changes |
title_full_unstemmed |
Antarctic Climate History and Global Climate Changes |
title_sort |
antarctic climate history and global climate changes |
publishDate |
2017 |
url |
http://hdl.handle.net/2122/11543 https://doi.org/10.1093/oxfordhb/9780190699420.013.18 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_relation |
Oxford University Press 1 http://hdl.handle.net/2122/11543 doi:10.1093/oxfordhb/9780190699420.013.18 |
op_rights |
open |
op_doi |
https://doi.org/10.1093/oxfordhb/9780190699420.013.18 |
_version_ |
1766271569231872000 |