Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma)
The timing and amplitude of changes in the Antarctic ice level are relevant to understanding past climate fluctuations and ongoing changes in the global climate and sea levels. In this study, we present surface exposure ages based on in situ produced cosmogenic 10Be and 21Ne in the bedrock samples o...
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Online Access: | http://hdl.handle.net/11568/192840 https://doi.org/10.1016/j.quascirev.2012.09.026 |
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ftunivpisairis:oai:arpi.unipi.it:11568/192840 2024-04-14T08:01:22+00:00 Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma) Di Nicola L. Strasky S. Schluechter C. Akcar N. Kubik P. W. Wieler R. BARONI, CARLO SALVATORE, MARIA CRISTINA Di Nicola, L. Baroni, Carlo Strasky, S. Salvatore, MARIA CRISTINA Schluechter, C. Akcar, N. Kubik, P. W. Wieler, R. 2012 STAMPA http://hdl.handle.net/11568/192840 https://doi.org/10.1016/j.quascirev.2012.09.026 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000312355900007 volume:57 issue:1 firstpage:85 lastpage:94 numberofpages:10 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11568/192840 doi:10.1016/j.quascirev.2012.09.026 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84868218807 Antarctica northern Victoria Land Exposure age Multiple cosmogenic nuclide approach Glacial Geomorphology erosion rate Climate stability of East Antarctic Ice Sheet info:eu-repo/semantics/article 2012 ftunivpisairis https://doi.org/10.1016/j.quascirev.2012.09.026 2024-03-21T18:37:46Z The timing and amplitude of changes in the Antarctic ice level are relevant to understanding past climate fluctuations and ongoing changes in the global climate and sea levels. In this study, we present surface exposure ages based on in situ produced cosmogenic 10Be and 21Ne in the bedrock samples of glacially eroded relict surfaces from the Deep Freeze Range, northern Victoria Land. The proximity of this region to the East Antarctic Ice Sheet indicates that the area is sensitive to variations in inland ice volume, permitting the investigation of the behavioural relationship between the East Antarctic Ice Sheet and the alpine glacial system in northern Victoria Land. Dating erosional surfaces provides a precise chronology of northern Victoria Land paleoclimate evolution and allows us to correlate the East Antarctic Ice Sheet response to global climate events and local ice level variations. The 10Be and 21Ne concentrations from the highest peaks of the Deep Freeze Range strongly indicate that the relict landscape features were continuously exposed for 5-7 Ma. Denudation rates inferred from our data show that the erosion rate of the summits has been extremely low (<5 cm/Ma) for at least 5-7 Ma. Along with evidence of persistent climate stability (cold and arid conditions) from other sectors of the Transantarctic Mountains, our results indicate that the transition from the wet-based to the cold-based glacial regime in northern Victoria Land occurred after the creation of the polar East Antarctic Ice Sheet in the Middle Miocene. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Antarctic Deep Freeze Range ENVELOPE(163.750,163.750,-74.250,-74.250) East Antarctic Ice Sheet The Antarctic Transantarctic Mountains Victoria Land Quaternary Science Reviews 57 85 94 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Antarctica northern Victoria Land Exposure age Multiple cosmogenic nuclide approach Glacial Geomorphology erosion rate Climate stability of East Antarctic Ice Sheet |
spellingShingle |
Antarctica northern Victoria Land Exposure age Multiple cosmogenic nuclide approach Glacial Geomorphology erosion rate Climate stability of East Antarctic Ice Sheet Di Nicola L. Strasky S. Schluechter C. Akcar N. Kubik P. W. Wieler R. BARONI, CARLO SALVATORE, MARIA CRISTINA Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma) |
topic_facet |
Antarctica northern Victoria Land Exposure age Multiple cosmogenic nuclide approach Glacial Geomorphology erosion rate Climate stability of East Antarctic Ice Sheet |
description |
The timing and amplitude of changes in the Antarctic ice level are relevant to understanding past climate fluctuations and ongoing changes in the global climate and sea levels. In this study, we present surface exposure ages based on in situ produced cosmogenic 10Be and 21Ne in the bedrock samples of glacially eroded relict surfaces from the Deep Freeze Range, northern Victoria Land. The proximity of this region to the East Antarctic Ice Sheet indicates that the area is sensitive to variations in inland ice volume, permitting the investigation of the behavioural relationship between the East Antarctic Ice Sheet and the alpine glacial system in northern Victoria Land. Dating erosional surfaces provides a precise chronology of northern Victoria Land paleoclimate evolution and allows us to correlate the East Antarctic Ice Sheet response to global climate events and local ice level variations. The 10Be and 21Ne concentrations from the highest peaks of the Deep Freeze Range strongly indicate that the relict landscape features were continuously exposed for 5-7 Ma. Denudation rates inferred from our data show that the erosion rate of the summits has been extremely low (<5 cm/Ma) for at least 5-7 Ma. Along with evidence of persistent climate stability (cold and arid conditions) from other sectors of the Transantarctic Mountains, our results indicate that the transition from the wet-based to the cold-based glacial regime in northern Victoria Land occurred after the creation of the polar East Antarctic Ice Sheet in the Middle Miocene. |
author2 |
Di Nicola, L. Baroni, Carlo Strasky, S. Salvatore, MARIA CRISTINA Schluechter, C. Akcar, N. Kubik, P. W. Wieler, R. |
format |
Article in Journal/Newspaper |
author |
Di Nicola L. Strasky S. Schluechter C. Akcar N. Kubik P. W. Wieler R. BARONI, CARLO SALVATORE, MARIA CRISTINA |
author_facet |
Di Nicola L. Strasky S. Schluechter C. Akcar N. Kubik P. W. Wieler R. BARONI, CARLO SALVATORE, MARIA CRISTINA |
author_sort |
Di Nicola L. |
title |
Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma) |
title_short |
Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma) |
title_full |
Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma) |
title_fullStr |
Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma) |
title_full_unstemmed |
Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma) |
title_sort |
multiple cosmogenic nuclides document the stability of the east antarctic ice sheet in northern victoria land since the late miocene (5-7 ma) |
publishDate |
2012 |
url |
http://hdl.handle.net/11568/192840 https://doi.org/10.1016/j.quascirev.2012.09.026 |
long_lat |
ENVELOPE(163.750,163.750,-74.250,-74.250) |
geographic |
Antarctic Deep Freeze Range East Antarctic Ice Sheet The Antarctic Transantarctic Mountains Victoria Land |
geographic_facet |
Antarctic Deep Freeze Range East Antarctic Ice Sheet The Antarctic Transantarctic Mountains Victoria Land |
genre |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000312355900007 volume:57 issue:1 firstpage:85 lastpage:94 numberofpages:10 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11568/192840 doi:10.1016/j.quascirev.2012.09.026 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84868218807 |
op_doi |
https://doi.org/10.1016/j.quascirev.2012.09.026 |
container_title |
Quaternary Science Reviews |
container_volume |
57 |
container_start_page |
85 |
op_container_end_page |
94 |
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1796308562290409472 |