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...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2014
|
Subjects: | |
Online Access: | https://researchprofiles.canberra.edu.au/en/publications/9b8e6755-633d-4a6b-b7db-fd046819f991 https://doi.org/10.1016/j.quascirev.2013.07.024 https://researchsystem.canberra.edu.au/ws/files/9315152/1_s2.0_S0277379113002898_main.pdf http://www.scopus.com/inward/record.url?scp=84903763295&partnerID=8YFLogxK |
id |
ftcanberrauncris:oai:pure.atira.dk:publications/9b8e6755-633d-4a6b-b7db-fd046819f991 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
University of Canberra Research Portal |
op_collection_id |
ftcanberrauncris |
language |
English |
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 (~30,000 years ago to present). This includes terrestrial cosmogenic nuclide dates from previously glaciated regions, 14 C chronologies from glacial and post-glacial deposits onshore and on the continental shelf, and ice sheet thickness changes inferred fromice cores and continental-scale ice sheet models. We also include new 14 C dates from the George V Land- Terre Adélie 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 300-400m 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 >1km below sea level on the inner continental shelf. The Lambert/Amery system thickened by a greater amount (800m) 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 ~100m lower than present at this time. Ice sheet recession may have started ~18,000 years ago in the Lambert/Amery glacial system, and by ~14,000 years ago in Mac.Robertson Land. These early pulses of deglaciation may have been responses to abrupt sea-level rise events such as Meltwater Pulse 1a, destabilising the ... |
format |
Article in Journal/Newspaper |
author |
Mackintosh, Andrew N. Verleyen, Elie O'Brien, Philip E. WHITE, Duanne Jones, R. Selwyn McKay, Robert M. 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 |
spellingShingle |
Mackintosh, Andrew N. Verleyen, Elie O'Brien, Philip E. WHITE, Duanne Jones, R. Selwyn McKay, Robert M. 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 |
author_facet |
Mackintosh, Andrew N. Verleyen, Elie O'Brien, Philip E. WHITE, Duanne Jones, R. Selwyn McKay, Robert M. 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 |
publishDate |
2014 |
url |
https://researchprofiles.canberra.edu.au/en/publications/9b8e6755-633d-4a6b-b7db-fd046819f991 https://doi.org/10.1016/j.quascirev.2013.07.024 https://researchsystem.canberra.edu.au/ws/files/9315152/1_s2.0_S0277379113002898_main.pdf http://www.scopus.com/inward/record.url?scp=84903763295&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(139.000,139.000,-67.000,-67.000) ENVELOPE(138.991,138.991,-59.999,-59.999) ENVELOPE(76.217,76.217,-69.400,-69.400) ENVELOPE(100.883,100.883,-66.167,-66.167) ENVELOPE(148.000,148.000,-68.500,-68.500) ENVELOPE(139.000,139.000,-60.000,-60.000) ENVELOPE(65.000,65.000,-70.000,-70.000) |
geographic |
Antarctic East Antarctica East Antarctic Ice Sheet Amery Terre Adélie Terre-Adélie Larsemann Hills Bunger Hills George V Land Adélie Coast Mac.Robertson Land |
geographic_facet |
Antarctic East Antarctica East Antarctic Ice Sheet Amery Terre Adélie Terre-Adélie Larsemann Hills Bunger Hills George V Land Adélie Coast 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 |
Mackintosh , A N , Verleyen , E , O'Brien , P E , WHITE , D , Jones , R S , McKay , R M , Dunbar , R , Gore , D B , Fink , D , Post , A L , Miura , H , Leventer , A , Goodwin , I , Hodgson , D A , Lilly , K , Crosta , X , Golledge , N R , Wagner , B , Berg , S , van Ommen , T , Zwartz , D , Roberts , S J , Vyverman , W & Masse , G 2014 , ' Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum ' , Quaternary Science Reviews , vol. 100 , pp. 10-30 . https://doi.org/10.1016/j.quascirev.2013.07.024 |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
_version_ |
1811646633678471168 |
spelling |
ftcanberrauncris:oai:pure.atira.dk:publications/9b8e6755-633d-4a6b-b7db-fd046819f991 2024-09-30T14:26:11+00:00 Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum Mackintosh, Andrew N. Verleyen, Elie O'Brien, Philip E. WHITE, Duanne Jones, R. Selwyn McKay, Robert M. 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 application/pdf https://researchprofiles.canberra.edu.au/en/publications/9b8e6755-633d-4a6b-b7db-fd046819f991 https://doi.org/10.1016/j.quascirev.2013.07.024 https://researchsystem.canberra.edu.au/ws/files/9315152/1_s2.0_S0277379113002898_main.pdf http://www.scopus.com/inward/record.url?scp=84903763295&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Mackintosh , A N , Verleyen , E , O'Brien , P E , WHITE , D , Jones , R S , McKay , R M , Dunbar , R , Gore , D B , Fink , D , Post , A L , Miura , H , Leventer , A , Goodwin , I , Hodgson , D A , Lilly , K , Crosta , X , Golledge , N R , Wagner , B , Berg , S , van Ommen , T , Zwartz , D , Roberts , S J , Vyverman , W & Masse , G 2014 , ' Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum ' , Quaternary Science Reviews , vol. 100 , pp. 10-30 . https://doi.org/10.1016/j.quascirev.2013.07.024 article 2014 ftcanberrauncris https://doi.org/10.1016/j.quascirev.2013.07.024 2024-09-18T23:41:38Z 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 (~30,000 years ago to present). This includes terrestrial cosmogenic nuclide dates from previously glaciated regions, 14 C chronologies from glacial and post-glacial deposits onshore and on the continental shelf, and ice sheet thickness changes inferred fromice cores and continental-scale ice sheet models. We also include new 14 C dates from the George V Land- Terre Adélie 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 300-400m 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 >1km below sea level on the inner continental shelf. The Lambert/Amery system thickened by a greater amount (800m) 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 ~100m lower than present at this time. Ice sheet recession may have started ~18,000 years ago in the Lambert/Amery glacial system, and by ~14,000 years ago in Mac.Robertson Land. These early pulses of deglaciation may have been responses to abrupt sea-level rise events such as Meltwater Pulse 1a, destabilising the ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica George V Land Ice Sheet Mac.Robertson Land University of Canberra Research Portal Antarctic East Antarctica East Antarctic Ice Sheet Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Terre Adélie ENVELOPE(139.000,139.000,-67.000,-67.000) Terre-Adélie ENVELOPE(138.991,138.991,-59.999,-59.999) Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) Bunger Hills ENVELOPE(100.883,100.883,-66.167,-66.167) George V Land ENVELOPE(148.000,148.000,-68.500,-68.500) Adélie Coast ENVELOPE(139.000,139.000,-60.000,-60.000) Mac.Robertson Land ENVELOPE(65.000,65.000,-70.000,-70.000) Quaternary Science Reviews 100 10 30 |