Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery
We present a new seafloor map for the northern Antarctic Peninsula (AP), including swath multibeam data sets from five national programs. Our map allows for the examination and interpretation of Last Glacial Maximum (LGM) paleo-ice-flow paths developed on the seafloor from the preservation of mega-s...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2015
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00012062 2023-05-15T13:34:49+02:00 Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery Lavoie, C. Domack, E. W. Pettit, E. C. Scambos, T. A. Larter, R. D. Schenke, H.-W. Yoo, K. C. Gutt, J. Wellner, J. Canals, M. Anderson, J. B. Amblas, D. 2015-04 electronic https://doi.org/10.5194/tc-9-613-2015 https://noa.gwlb.de/receive/cop_mods_00012062 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00012018/tc-9-613-2015.pdf https://tc.copernicus.org/articles/9/613/2015/tc-9-613-2015.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-9-613-2015 https://noa.gwlb.de/receive/cop_mods_00012062 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00012018/tc-9-613-2015.pdf https://tc.copernicus.org/articles/9/613/2015/tc-9-613-2015.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2015 ftnonlinearchiv https://doi.org/10.5194/tc-9-613-2015 2022-02-08T22:56:15Z We present a new seafloor map for the northern Antarctic Peninsula (AP), including swath multibeam data sets from five national programs. Our map allows for the examination and interpretation of Last Glacial Maximum (LGM) paleo-ice-flow paths developed on the seafloor from the preservation of mega-scale glacial lineations, drumlinized features, and selective linear erosion. We combine this with terrestrial observations of flow direction to place constraints on ice divides and ice domes on the AP continental shelf during the LGM time interval. The results show a flow bifurcation as ice exits the Larsen B embayment. Flow emanating off the Seal Nunataks (including Robertson Island) is directed toward the southeast, then eastward as the flow transits toward the Robertson Trough. A second, stronger "streaming flow" is directed toward the southeast, then southward as ice overflowed the tip of the Jason Peninsula to reach the southern perimeter of the embayment. Our reconstruction also refines the extent of at least five other distinct paleo-ice-stream systems that, in turn, serve to delineate seven broad regions where contemporaneous ice domes must have been centered on the continental shelf at LGM. Our reconstruction is more detailed than other recent compilations because we followed specific ice-flow indicators and have kept tributary flow paths parallel. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet Robertson Island The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic Antarctic Peninsula Seal Nunataks ENVELOPE(-60.255,-60.255,-65.049,-65.049) Jason Peninsula ENVELOPE(-61.667,-61.667,-66.250,-66.250) Robertson Island ENVELOPE(-59.667,-59.667,-65.167,-65.167) The Cryosphere 9 2 613 629 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Lavoie, C. Domack, E. W. Pettit, E. C. Scambos, T. A. Larter, R. D. Schenke, H.-W. Yoo, K. C. Gutt, J. Wellner, J. Canals, M. Anderson, J. B. Amblas, D. Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery |
topic_facet |
article Verlagsveröffentlichung |
description |
We present a new seafloor map for the northern Antarctic Peninsula (AP), including swath multibeam data sets from five national programs. Our map allows for the examination and interpretation of Last Glacial Maximum (LGM) paleo-ice-flow paths developed on the seafloor from the preservation of mega-scale glacial lineations, drumlinized features, and selective linear erosion. We combine this with terrestrial observations of flow direction to place constraints on ice divides and ice domes on the AP continental shelf during the LGM time interval. The results show a flow bifurcation as ice exits the Larsen B embayment. Flow emanating off the Seal Nunataks (including Robertson Island) is directed toward the southeast, then eastward as the flow transits toward the Robertson Trough. A second, stronger "streaming flow" is directed toward the southeast, then southward as ice overflowed the tip of the Jason Peninsula to reach the southern perimeter of the embayment. Our reconstruction also refines the extent of at least five other distinct paleo-ice-stream systems that, in turn, serve to delineate seven broad regions where contemporaneous ice domes must have been centered on the continental shelf at LGM. Our reconstruction is more detailed than other recent compilations because we followed specific ice-flow indicators and have kept tributary flow paths parallel. |
format |
Article in Journal/Newspaper |
author |
Lavoie, C. Domack, E. W. Pettit, E. C. Scambos, T. A. Larter, R. D. Schenke, H.-W. Yoo, K. C. Gutt, J. Wellner, J. Canals, M. Anderson, J. B. Amblas, D. |
author_facet |
Lavoie, C. Domack, E. W. Pettit, E. C. Scambos, T. A. Larter, R. D. Schenke, H.-W. Yoo, K. C. Gutt, J. Wellner, J. Canals, M. Anderson, J. B. Amblas, D. |
author_sort |
Lavoie, C. |
title |
Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery |
title_short |
Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery |
title_full |
Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery |
title_fullStr |
Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery |
title_full_unstemmed |
Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery |
title_sort |
configuration of the northern antarctic peninsula ice sheet at lgm based on a new synthesis of seabed imagery |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-613-2015 https://noa.gwlb.de/receive/cop_mods_00012062 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00012018/tc-9-613-2015.pdf https://tc.copernicus.org/articles/9/613/2015/tc-9-613-2015.pdf |
long_lat |
ENVELOPE(-60.255,-60.255,-65.049,-65.049) ENVELOPE(-61.667,-61.667,-66.250,-66.250) ENVELOPE(-59.667,-59.667,-65.167,-65.167) |
geographic |
Antarctic Antarctic Peninsula Seal Nunataks Jason Peninsula Robertson Island |
geographic_facet |
Antarctic Antarctic Peninsula Seal Nunataks Jason Peninsula Robertson Island |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Robertson Island The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Robertson Island The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-9-613-2015 https://noa.gwlb.de/receive/cop_mods_00012062 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00012018/tc-9-613-2015.pdf https://tc.copernicus.org/articles/9/613/2015/tc-9-613-2015.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-9-613-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
2 |
container_start_page |
613 |
op_container_end_page |
629 |
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1766057789559406592 |