Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum
The East Antarctic Ice Sheet (EAIS) is the largest continental ice mass on Earth, and documenting its evolution since the Last Glacial Maximum (LGM) is important for understanding its present-day and future behaviour. As part of a community effort, we review geological evidence from East Antarctica...
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Online Access: | https://doi.org/10.1016/j.quascirev.2013.07.024 https://archimer.ifremer.fr/doc/00290/40085/39171.pdf https://archimer.ifremer.fr/doc/00290/40085/39172.xlsx |
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fttriple:oai:gotriple.eu:10670/1.h8ohnt 2023-05-15T13:54:45+02:00 Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum Mackintosh, Andrew N. Verleyen, Elie O'Brien, Philip E., White, Duanne A. Jones, R. Selwyn Mckay, Robert Dunbar, Robert Gore, Damian B. Fink, David Post, Alexandra L. Miura, Hideki Leventer, Amy Goodwin, Ian Hodgson, Dominic A. Lilly, Katherine Crosta, Xavier Golledge, Nicholas R. Wagner, Bernd Berg, Sonja Van Ommen, Tas Zwartz, Dan Roberts, Stephen J. Vyverman, Wim Masse, Guillaume 2014-09-15 https://doi.org/10.1016/j.quascirev.2013.07.024 https://archimer.ifremer.fr/doc/00290/40085/39171.pdf https://archimer.ifremer.fr/doc/00290/40085/39172.xlsx en eng Pergamon-elsevier Science Ltd doi:10.1016/j.quascirev.2013.07.024 10670/1.h8ohnt https://archimer.ifremer.fr/doc/00290/40085/39171.pdf https://archimer.ifremer.fr/doc/00290/40085/39172.xlsx Archimer, archive institutionnelle de l'Ifremer Quaternary Science Reviews (0277-3791) (Pergamon-elsevier Science Ltd), 2014-09-15 , Vol. 100 , P. 10-30 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2014 fttriple https://doi.org/10.1016/j.quascirev.2013.07.024 2023-01-22T16:36:25Z The East Antarctic Ice Sheet (EAIS) is the largest continental ice mass on Earth, and documenting its evolution since the Last Glacial Maximum (LGM) is important for understanding its present-day and future behaviour. As part of a community effort, we review geological evidence from East Antarctica that constrains the ice sheet history throughout this period (similar to 30,000 years ago to present). This includes terrestrial cosmogenic nuclide dates from previously glaciated regions, C-14 chronologies from glacial and post-glacial deposits onshore and on the continental shelf, and ice sheet thickness changes inferred from ice cores and continental-scale ice sheet models. We also include new C-14 dates from the George V Land Terre Adelie Coast shelf. We show that the EAIS advanced to the continental shelf margin in some parts of East Antarctica, and that the ice sheet characteristically thickened by 300-400 m near the present-day coastline at these sites. This advance was associated with the formation of low-gradient ice streams that grounded at depths of >1 km below sea level on the inner continental shelf. The Lambert/Amery system thickened by a greater amount (800 m) near its present-day grounding zone, but did not advance beyond the inner continental shelf. At other sites in coastal East Antarctica (e.g. Bunger Hills, Larsemann Hills), very little change in the ice sheet margin occurred at the LGM, perhaps because ice streams accommodated any excess ice build up, leaving adjacent, ice-free areas relatively unaffected. Evidence from nunataks indicates that the amount of ice sheet thickening diminished inland at the LGM, an observation supported by ice cores, which suggest that interior ice sheet domes were similar to 100 m lower than present at this time. Ice sheet recession may have started similar to 18,000 years ago in the Lambert/Amery glacial system, and by similar to 14,000 years ago in Mac.Robertson Land. These early pulses of deglaciation may have been responses to abrupt sea-level rise events such ... Text Antarc* Antarctic Antarctica East Antarctica George V Land Ice Sheet Mac.Robertson Land Unknown Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Antarctic Bunger Hills ENVELOPE(100.883,100.883,-66.167,-66.167) East Antarctic Ice Sheet East Antarctica George V Land ENVELOPE(148.000,148.000,-68.500,-68.500) Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) Mac.Robertson Land ENVELOPE(65.000,65.000,-70.000,-70.000) Quaternary Science Reviews 100 10 30 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir Mackintosh, Andrew N. Verleyen, Elie O'Brien, Philip E., White, Duanne A. Jones, R. Selwyn Mckay, Robert Dunbar, Robert Gore, Damian B. Fink, David Post, Alexandra L. Miura, Hideki Leventer, Amy Goodwin, Ian Hodgson, Dominic A. Lilly, Katherine Crosta, Xavier Golledge, Nicholas R. Wagner, Bernd Berg, Sonja Van Ommen, Tas Zwartz, Dan Roberts, Stephen J. Vyverman, Wim Masse, Guillaume Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum |
topic_facet |
geo envir |
description |
The East Antarctic Ice Sheet (EAIS) is the largest continental ice mass on Earth, and documenting its evolution since the Last Glacial Maximum (LGM) is important for understanding its present-day and future behaviour. As part of a community effort, we review geological evidence from East Antarctica that constrains the ice sheet history throughout this period (similar to 30,000 years ago to present). This includes terrestrial cosmogenic nuclide dates from previously glaciated regions, C-14 chronologies from glacial and post-glacial deposits onshore and on the continental shelf, and ice sheet thickness changes inferred from ice cores and continental-scale ice sheet models. We also include new C-14 dates from the George V Land Terre Adelie Coast shelf. We show that the EAIS advanced to the continental shelf margin in some parts of East Antarctica, and that the ice sheet characteristically thickened by 300-400 m near the present-day coastline at these sites. This advance was associated with the formation of low-gradient ice streams that grounded at depths of >1 km below sea level on the inner continental shelf. The Lambert/Amery system thickened by a greater amount (800 m) near its present-day grounding zone, but did not advance beyond the inner continental shelf. At other sites in coastal East Antarctica (e.g. Bunger Hills, Larsemann Hills), very little change in the ice sheet margin occurred at the LGM, perhaps because ice streams accommodated any excess ice build up, leaving adjacent, ice-free areas relatively unaffected. Evidence from nunataks indicates that the amount of ice sheet thickening diminished inland at the LGM, an observation supported by ice cores, which suggest that interior ice sheet domes were similar to 100 m lower than present at this time. Ice sheet recession may have started similar to 18,000 years ago in the Lambert/Amery glacial system, and by similar to 14,000 years ago in Mac.Robertson Land. These early pulses of deglaciation may have been responses to abrupt sea-level rise events such ... |
format |
Text |
author |
Mackintosh, Andrew N. Verleyen, Elie O'Brien, Philip E., White, Duanne A. Jones, R. Selwyn Mckay, Robert Dunbar, Robert Gore, Damian B. Fink, David Post, Alexandra L. Miura, Hideki Leventer, Amy Goodwin, Ian Hodgson, Dominic A. Lilly, Katherine Crosta, Xavier Golledge, Nicholas R. Wagner, Bernd Berg, Sonja Van Ommen, Tas Zwartz, Dan Roberts, Stephen J. Vyverman, Wim Masse, Guillaume |
author_facet |
Mackintosh, Andrew N. Verleyen, Elie O'Brien, Philip E., White, Duanne A. Jones, R. Selwyn Mckay, Robert Dunbar, Robert Gore, Damian B. Fink, David Post, Alexandra L. Miura, Hideki Leventer, Amy Goodwin, Ian Hodgson, Dominic A. Lilly, Katherine Crosta, Xavier Golledge, Nicholas R. Wagner, Bernd Berg, Sonja Van Ommen, Tas Zwartz, Dan Roberts, Stephen J. Vyverman, Wim Masse, Guillaume |
author_sort |
Mackintosh, Andrew N. |
title |
Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum |
title_short |
Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum |
title_full |
Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum |
title_fullStr |
Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum |
title_full_unstemmed |
Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum |
title_sort |
retreat history of the east antarctic ice sheet since the last glacial maximum |
publisher |
Pergamon-elsevier Science Ltd |
publishDate |
2014 |
url |
https://doi.org/10.1016/j.quascirev.2013.07.024 https://archimer.ifremer.fr/doc/00290/40085/39171.pdf https://archimer.ifremer.fr/doc/00290/40085/39172.xlsx |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(100.883,100.883,-66.167,-66.167) ENVELOPE(148.000,148.000,-68.500,-68.500) ENVELOPE(76.217,76.217,-69.400,-69.400) ENVELOPE(65.000,65.000,-70.000,-70.000) |
geographic |
Amery Antarctic Bunger Hills East Antarctic Ice Sheet East Antarctica George V Land Larsemann Hills Mac.Robertson Land |
geographic_facet |
Amery Antarctic Bunger Hills East Antarctic Ice Sheet East Antarctica George V Land Larsemann Hills Mac.Robertson Land |
genre |
Antarc* Antarctic Antarctica East Antarctica George V Land Ice Sheet Mac.Robertson Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica George V Land Ice Sheet Mac.Robertson Land |
op_source |
Archimer, archive institutionnelle de l'Ifremer Quaternary Science Reviews (0277-3791) (Pergamon-elsevier Science Ltd), 2014-09-15 , Vol. 100 , P. 10-30 |
op_relation |
doi:10.1016/j.quascirev.2013.07.024 10670/1.h8ohnt https://archimer.ifremer.fr/doc/00290/40085/39171.pdf https://archimer.ifremer.fr/doc/00290/40085/39172.xlsx |
op_doi |
https://doi.org/10.1016/j.quascirev.2013.07.024 |
container_title |
Quaternary Science Reviews |
container_volume |
100 |
container_start_page |
10 |
op_container_end_page |
30 |
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1766260839495499776 |