Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands
This paper is the maritime and sub–Antarctic contribution to the Scientific Committee for Antarctic Research (SCAR) Past Antarctic Ice Sheet Dynamics (PAIS) community Antarctic Ice Sheet reconstruction. The overarching aim for all sectors of Antarctica was to reconstruct the Last Glacial Maximum (LG...
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ftdatacite:10.7892/boris.59123 2023-05-15T13:54:54+02:00 Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands Verfaillie, Deborah Colhoun, Eric A. Selkirk, Patricia M. Bentley, Michael J. Saunders, Krystyna Van Der Putten, Nathalie Roberts, Stephen J. Hedding, David W. Dickens, William A. Smith, James A. Cofaigh, Colm Ó Verleyen, Elie Favier, Vincent McGlone, Matt S. Vyverman, Wim Brunstein, Daniel Nel, Werner Graham, Alastair G.C. Hall, Kevin Jomelli, Vincent Mackintosh, Andrew Hodgson, Dominic A. 2014 application/pdf https://dx.doi.org/10.7892/boris.59123 https://boris.unibe.ch/59123/ en eng Pergamon info:eu-repo/semantics/openAccess 550 Earth sciences & geology 910 Geography & travel Text article-journal ScholarlyArticle 2014 ftdatacite https://doi.org/10.7892/boris.59123 2021-11-05T12:55:41Z This paper is the maritime and sub–Antarctic contribution to the Scientific Committee for Antarctic Research (SCAR) Past Antarctic Ice Sheet Dynamics (PAIS) community Antarctic Ice Sheet reconstruction. The overarching aim for all sectors of Antarctica was to reconstruct the Last Glacial Maximum (LGM) ice sheet extent and thickness, and map the subsequent deglaciation in a series of 5000 year time slices. However, our review of the literature found surprisingly few high quality chronological constraints on changing glacier extents on these timescales in the maritime and sub–Antarctic sector. Therefore, in this paper we focus on an assessment of the terrestrial and offshore evidence for the LGM ice extent, establishing minimum ages for the onset of deglaciation, and separating evidence of deglaciation from LGM limits from those associated with later Holocene glacier fluctuations. Evidence included geomorphological descriptions of glacial landscapes, radiocarbon dated basal peat and lake sediment deposits, cosmogenic isotope ages of glacial features and molecular biological data. We propose a classification of the glacial history of the maritime and sub–Antarctic islands based on this assembled evidence. These include: (Type I) islands which accumulated little or no LGM ice; (Type II) islands with a limited LGM ice extent but evidence of extensive earlier continental shelf glaciations; (Type III) seamounts and volcanoes unlikely to have accumulated significant LGM ice cover; (Type IV) islands on shallow shelves with both terrestrial and submarine evidence of LGM (and/or earlier) ice expansion; (Type V) Islands north of the Antarctic Polar Front with terrestrial evidence of LGM ice expansion; and (Type VI) islands with no data. Finally, we review the climatological and geomorphological settings that separate the glaciological history of the islands within this classification scheme. Text Antarc* Antarctic Antarctica Ice Sheet SCAR DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
550 Earth sciences & geology 910 Geography & travel |
spellingShingle |
550 Earth sciences & geology 910 Geography & travel Verfaillie, Deborah Colhoun, Eric A. Selkirk, Patricia M. Bentley, Michael J. Saunders, Krystyna Van Der Putten, Nathalie Roberts, Stephen J. Hedding, David W. Dickens, William A. Smith, James A. Cofaigh, Colm Ó Verleyen, Elie Favier, Vincent McGlone, Matt S. Vyverman, Wim Brunstein, Daniel Nel, Werner Graham, Alastair G.C. Hall, Kevin Jomelli, Vincent Mackintosh, Andrew Hodgson, Dominic A. Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands |
topic_facet |
550 Earth sciences & geology 910 Geography & travel |
description |
This paper is the maritime and sub–Antarctic contribution to the Scientific Committee for Antarctic Research (SCAR) Past Antarctic Ice Sheet Dynamics (PAIS) community Antarctic Ice Sheet reconstruction. The overarching aim for all sectors of Antarctica was to reconstruct the Last Glacial Maximum (LGM) ice sheet extent and thickness, and map the subsequent deglaciation in a series of 5000 year time slices. However, our review of the literature found surprisingly few high quality chronological constraints on changing glacier extents on these timescales in the maritime and sub–Antarctic sector. Therefore, in this paper we focus on an assessment of the terrestrial and offshore evidence for the LGM ice extent, establishing minimum ages for the onset of deglaciation, and separating evidence of deglaciation from LGM limits from those associated with later Holocene glacier fluctuations. Evidence included geomorphological descriptions of glacial landscapes, radiocarbon dated basal peat and lake sediment deposits, cosmogenic isotope ages of glacial features and molecular biological data. We propose a classification of the glacial history of the maritime and sub–Antarctic islands based on this assembled evidence. These include: (Type I) islands which accumulated little or no LGM ice; (Type II) islands with a limited LGM ice extent but evidence of extensive earlier continental shelf glaciations; (Type III) seamounts and volcanoes unlikely to have accumulated significant LGM ice cover; (Type IV) islands on shallow shelves with both terrestrial and submarine evidence of LGM (and/or earlier) ice expansion; (Type V) Islands north of the Antarctic Polar Front with terrestrial evidence of LGM ice expansion; and (Type VI) islands with no data. Finally, we review the climatological and geomorphological settings that separate the glaciological history of the islands within this classification scheme. |
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Text |
author |
Verfaillie, Deborah Colhoun, Eric A. Selkirk, Patricia M. Bentley, Michael J. Saunders, Krystyna Van Der Putten, Nathalie Roberts, Stephen J. Hedding, David W. Dickens, William A. Smith, James A. Cofaigh, Colm Ó Verleyen, Elie Favier, Vincent McGlone, Matt S. Vyverman, Wim Brunstein, Daniel Nel, Werner Graham, Alastair G.C. Hall, Kevin Jomelli, Vincent Mackintosh, Andrew Hodgson, Dominic A. |
author_facet |
Verfaillie, Deborah Colhoun, Eric A. Selkirk, Patricia M. Bentley, Michael J. Saunders, Krystyna Van Der Putten, Nathalie Roberts, Stephen J. Hedding, David W. Dickens, William A. Smith, James A. Cofaigh, Colm Ó Verleyen, Elie Favier, Vincent McGlone, Matt S. Vyverman, Wim Brunstein, Daniel Nel, Werner Graham, Alastair G.C. Hall, Kevin Jomelli, Vincent Mackintosh, Andrew Hodgson, Dominic A. |
author_sort |
Verfaillie, Deborah |
title |
Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands |
title_short |
Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands |
title_full |
Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands |
title_fullStr |
Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands |
title_full_unstemmed |
Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands |
title_sort |
terrestrial and submarine evidence for the extent and timing of the last glacial maximum and the onset of deglaciation on the maritime-antarctic and sub-antarctic islands |
publisher |
Pergamon |
publishDate |
2014 |
url |
https://dx.doi.org/10.7892/boris.59123 https://boris.unibe.ch/59123/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet SCAR |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet SCAR |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.7892/boris.59123 |
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1766261104919445504 |