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...
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Online Access: | https://hdl.handle.net/1911/88243 https://doi.org/10.1016/j.quascirev.2014.06.023 |
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ftriceuniv:oai:scholarship.rice.edu:1911/88243 2023-06-11T04:04:37+02:00 Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum Ó Cofaigh, Colm Davies, Bethan J. Livingstone, Stephen J. Smith, James A. Johnson, Joanne S. Hocking, Emma P. Hodgson, Dominic A. Anderson, John B. Bentley, Michael J. Canals, Miquel Domack, Eugene Dowdeswell, Julian A. Evans, Jeffrey Glasser, Neil F. Hillenbrand, Claus-Dieter Larter, Robert D. Roberts, Stephen J. Simms, Alexander R. 2014 application/pdf https://hdl.handle.net/1911/88243 https://doi.org/10.1016/j.quascirev.2014.06.023 eng eng Elsevier Ó Cofaigh, Colm, Davies, Bethan J., Livingstone, Stephen J., et al. "Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum." Quaternary Science Reviews, 100, (2014) Elsevier: 87-110. http://dx.doi.org/10.1016/j.quascirev.2014.06.023. https://hdl.handle.net/1911/88243 http://dx.doi.org/10.1016/j.quascirev.2014.06.023 This is an open access article under the CC BY license. http://creativecommons.org/licenses/by/3.0/ Antarctic Peninsula Ice Sheet Last Glacial Maximum Deglaciation Antarctica Glacial geology Journal article Text publisher version 2014 ftriceuniv https://doi.org/10.1016/j.quascirev.2014.06.023 2023-05-06T22:31:16Z 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 Antarctica Ice Sheet Rice University: Digital Scholarship Archive Antarctic The Antarctic Antarctic Peninsula Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Quaternary Science Reviews 100 87 110 |
institution |
Open Polar |
collection |
Rice University: Digital Scholarship Archive |
op_collection_id |
ftriceuniv |
language |
English |
topic |
Antarctic Peninsula Ice Sheet Last Glacial Maximum Deglaciation Antarctica Glacial geology |
spellingShingle |
Antarctic Peninsula Ice Sheet Last Glacial Maximum Deglaciation Antarctica Glacial geology Ó Cofaigh, Colm Davies, Bethan J. Livingstone, Stephen J. Smith, James A. Johnson, Joanne S. Hocking, Emma P. Hodgson, Dominic A. Anderson, John B. Bentley, Michael J. Canals, Miquel Domack, Eugene Dowdeswell, Julian A. Evans, Jeffrey Glasser, Neil F. Hillenbrand, Claus-Dieter Larter, Robert D. Roberts, Stephen J. Simms, Alexander R. Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum |
topic_facet |
Antarctic Peninsula Ice Sheet Last Glacial Maximum Deglaciation Antarctica Glacial geology |
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 J. Livingstone, Stephen J. Smith, James A. Johnson, Joanne S. Hocking, Emma P. Hodgson, Dominic A. Anderson, John B. Bentley, Michael J. Canals, Miquel Domack, Eugene Dowdeswell, Julian A. Evans, Jeffrey Glasser, Neil F. Hillenbrand, Claus-Dieter Larter, Robert D. Roberts, Stephen J. Simms, Alexander R. |
author_facet |
Ó Cofaigh, Colm Davies, Bethan J. Livingstone, Stephen J. Smith, James A. Johnson, Joanne S. Hocking, Emma P. Hodgson, Dominic A. Anderson, John B. Bentley, Michael J. Canals, Miquel Domack, Eugene Dowdeswell, Julian A. Evans, Jeffrey Glasser, Neil F. Hillenbrand, Claus-Dieter Larter, Robert D. Roberts, Stephen J. Simms, Alexander R. |
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://hdl.handle.net/1911/88243 https://doi.org/10.1016/j.quascirev.2014.06.023 |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Marguerite |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Marguerite |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet |
op_relation |
Ó Cofaigh, Colm, Davies, Bethan J., Livingstone, Stephen J., et al. "Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum." Quaternary Science Reviews, 100, (2014) Elsevier: 87-110. http://dx.doi.org/10.1016/j.quascirev.2014.06.023. https://hdl.handle.net/1911/88243 http://dx.doi.org/10.1016/j.quascirev.2014.06.023 |
op_rights |
This is an open access article under the CC BY license. http://creativecommons.org/licenses/by/3.0/ |
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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1768389176743428096 |