Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum
This paper compiles and reviews marine and terrestrial data constraining the dimensions and configuration of the Antarctic Peninsula Ice Sheet (APIS) from the Last Glacial Maximum (LGM) through deglaciation to the present day. These data are used to reconstruct grounding-line retreat in 5 ka time-st...
Published in: | Quaternary Science Reviews |
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/17734/ https://doi.org/10.1016/j.quascirev.2014.06.023 https://nrl.northumbria.ac.uk/id/eprint/17734/1/reconstruction_of_ice-sheet_changes.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:17734 2023-05-15T13:35:33+02:00 Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum Ó Cofaigh, Colm Davies, Bethan Livingstone, Stephen Smith, James A. Johnson, Joanne S. Hocking, Emma Hodgson, Dominic Anderson, John Bentley, Michael Canals, Miguel Domack, Eugene Dowdeswell, Julian Evans, Jeffrey Glasser, Neil Hillenbrand, Claus-Dieter Larter, Robert Roberts, Stephen J. Simms, Alexander 2014-09-15 application/pdf https://nrl.northumbria.ac.uk/id/eprint/17734/ https://doi.org/10.1016/j.quascirev.2014.06.023 https://nrl.northumbria.ac.uk/id/eprint/17734/1/reconstruction_of_ice-sheet_changes.pdf en eng Elsevier https://nrl.northumbria.ac.uk/id/eprint/17734/1/reconstruction_of_ice-sheet_changes.pdf Ó Cofaigh, Colm, Davies, Bethan, Livingstone, Stephen, Smith, James A., Johnson, Joanne S., Hocking, Emma, Hodgson, Dominic, Anderson, John, Bentley, Michael, Canals, Miguel, Domack, Eugene, Dowdeswell, Julian, Evans, Jeffrey, Glasser, Neil, Hillenbrand, Claus-Dieter, Larter, Robert, Roberts, Stephen J. and Simms, Alexander (2014) Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum. Quaternary Science Reviews, 100. pp. 87-110. ISSN 0277-3791 cc_by CC-BY F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2014 ftunivnorthumb https://doi.org/10.1016/j.quascirev.2014.06.023 2022-09-25T06:00:06Z This paper compiles and reviews marine and terrestrial data constraining the dimensions and configuration of the Antarctic Peninsula Ice Sheet (APIS) from the Last Glacial Maximum (LGM) through deglaciation to the present day. These data are used to reconstruct grounding-line retreat in 5 ka time-steps from 25 ka BP to present. Glacial landforms and subglacial tills on the eastern and western Antarctic Peninsula (AP) shelf indicate that the APIS was grounded to the outer shelf/shelf edge at the LGM and contained a series of fast-flowing ice streams that drained along cross-shelf bathymetric troughs. The ice sheet was grounded at the shelf edge until ∼20 cal ka BP. Chronological control on retreat is provided by radiocarbon dates on glacimarine sediments from the shelf troughs and on lacustrine and terrestrial organic remains, as well as cosmogenic nuclide dates on erratics and ice moulded bedrock. Retreat in the east was underway by about 18 cal ka BP. The earliest dates on recession in the west are from Bransfield Basin where recession was underway by 17.5 cal ka BP. Ice streams were active during deglaciation at least until the ice sheet had pulled back to the mid-shelf. The timing of initial retreat decreased progressively southwards along the western AP shelf; the large ice stream in Marguerite Trough may have remained grounded at the shelf edge until about 14 cal ka BP, although terrestrial cosmogenic nuclide ages indicate that thinning had commenced by 18 ka BP. Between 15 and 10 cal ka BP the APIS underwent significant recession along the western AP margin, although retreat between individual troughs was asynchronous. Ice in Marguerite Trough may have still been grounded on the mid-shelf at 10 cal ka BP. In the Larsen-A region the transition from grounded to floating ice was established by 10.7–10.6 cal ka BP. The APIS had retreated towards its present configuration in the western AP by the mid-Holocene but on the eastern peninsula may have approached its present configuration several thousand years ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet Northumbria University, Newcastle: Northumbria Research Link (NRL) Antarctic Antarctic Peninsula Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) The Antarctic Quaternary Science Reviews 100 87 110 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences Ó Cofaigh, Colm Davies, Bethan Livingstone, Stephen Smith, James A. Johnson, Joanne S. Hocking, Emma Hodgson, Dominic Anderson, John Bentley, Michael Canals, Miguel Domack, Eugene Dowdeswell, Julian Evans, Jeffrey Glasser, Neil Hillenbrand, Claus-Dieter Larter, Robert Roberts, Stephen J. Simms, Alexander Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum |
topic_facet |
F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
This paper compiles and reviews marine and terrestrial data constraining the dimensions and configuration of the Antarctic Peninsula Ice Sheet (APIS) from the Last Glacial Maximum (LGM) through deglaciation to the present day. These data are used to reconstruct grounding-line retreat in 5 ka time-steps from 25 ka BP to present. Glacial landforms and subglacial tills on the eastern and western Antarctic Peninsula (AP) shelf indicate that the APIS was grounded to the outer shelf/shelf edge at the LGM and contained a series of fast-flowing ice streams that drained along cross-shelf bathymetric troughs. The ice sheet was grounded at the shelf edge until ∼20 cal ka BP. Chronological control on retreat is provided by radiocarbon dates on glacimarine sediments from the shelf troughs and on lacustrine and terrestrial organic remains, as well as cosmogenic nuclide dates on erratics and ice moulded bedrock. Retreat in the east was underway by about 18 cal ka BP. The earliest dates on recession in the west are from Bransfield Basin where recession was underway by 17.5 cal ka BP. Ice streams were active during deglaciation at least until the ice sheet had pulled back to the mid-shelf. The timing of initial retreat decreased progressively southwards along the western AP shelf; the large ice stream in Marguerite Trough may have remained grounded at the shelf edge until about 14 cal ka BP, although terrestrial cosmogenic nuclide ages indicate that thinning had commenced by 18 ka BP. Between 15 and 10 cal ka BP the APIS underwent significant recession along the western AP margin, although retreat between individual troughs was asynchronous. Ice in Marguerite Trough may have still been grounded on the mid-shelf at 10 cal ka BP. In the Larsen-A region the transition from grounded to floating ice was established by 10.7–10.6 cal ka BP. The APIS had retreated towards its present configuration in the western AP by the mid-Holocene but on the eastern peninsula may have approached its present configuration several thousand years ... |
format |
Article in Journal/Newspaper |
author |
Ó Cofaigh, Colm Davies, Bethan Livingstone, Stephen Smith, James A. Johnson, Joanne S. Hocking, Emma Hodgson, Dominic Anderson, John Bentley, Michael Canals, Miguel Domack, Eugene Dowdeswell, Julian Evans, Jeffrey Glasser, Neil Hillenbrand, Claus-Dieter Larter, Robert Roberts, Stephen J. Simms, Alexander |
author_facet |
Ó Cofaigh, Colm Davies, Bethan Livingstone, Stephen Smith, James A. Johnson, Joanne S. Hocking, Emma Hodgson, Dominic Anderson, John Bentley, Michael Canals, Miguel Domack, Eugene Dowdeswell, Julian Evans, Jeffrey Glasser, Neil Hillenbrand, Claus-Dieter Larter, Robert Roberts, Stephen J. Simms, Alexander |
author_sort |
Ó Cofaigh, Colm |
title |
Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum |
title_short |
Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum |
title_full |
Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum |
title_fullStr |
Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum |
title_full_unstemmed |
Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum |
title_sort |
reconstruction of ice-sheet changes in the antarctic peninsula since the last glacial maximum |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://nrl.northumbria.ac.uk/id/eprint/17734/ https://doi.org/10.1016/j.quascirev.2014.06.023 https://nrl.northumbria.ac.uk/id/eprint/17734/1/reconstruction_of_ice-sheet_changes.pdf |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) |
geographic |
Antarctic Antarctic Peninsula Marguerite The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Marguerite The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/17734/1/reconstruction_of_ice-sheet_changes.pdf Ó Cofaigh, Colm, Davies, Bethan, Livingstone, Stephen, Smith, James A., Johnson, Joanne S., Hocking, Emma, Hodgson, Dominic, Anderson, John, Bentley, Michael, Canals, Miguel, Domack, Eugene, Dowdeswell, Julian, Evans, Jeffrey, Glasser, Neil, Hillenbrand, Claus-Dieter, Larter, Robert, Roberts, Stephen J. and Simms, Alexander (2014) Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum. Quaternary Science Reviews, 100. pp. 87-110. ISSN 0277-3791 |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.quascirev.2014.06.023 |
container_title |
Quaternary Science Reviews |
container_volume |
100 |
container_start_page |
87 |
op_container_end_page |
110 |
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1766067070129143808 |