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...
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Language: | English |
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Copernicus Publications
2015
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Online Access: | https://doi.org/10.5194/tc-9-613-2015 http://www.the-cryosphere.net/9/613/2015/tc-9-613-2015.pdf https://doaj.org/article/51abc47cedf24a15a80199ac716d99f4 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:51abc47cedf24a15a80199ac716d99f4 2023-05-15T13:59:11+02:00 Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery C. Lavoie E. W. Domack E. C. Pettit T. A. Scambos R. D. Larter H.-W. Schenke K. C. Yoo J. Gutt J. Wellner M. Canals J. B. Anderson D. Amblas 2015-04-01 https://doi.org/10.5194/tc-9-613-2015 http://www.the-cryosphere.net/9/613/2015/tc-9-613-2015.pdf https://doaj.org/article/51abc47cedf24a15a80199ac716d99f4 en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-9-613-2015 http://www.the-cryosphere.net/9/613/2015/tc-9-613-2015.pdf https://doaj.org/article/51abc47cedf24a15a80199ac716d99f4 undefined The Cryosphere, Vol 9, Iss 2, Pp 613-629 (2015) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2015 fttriple https://doi.org/10.5194/tc-9-613-2015 2023-01-22T19:25:57Z 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 Unknown Antarctic Antarctic Peninsula Jason Peninsula ENVELOPE(-61.667,-61.667,-66.250,-66.250) Robertson Island ENVELOPE(-59.667,-59.667,-65.167,-65.167) Seal Nunataks ENVELOPE(-60.255,-60.255,-65.049,-65.049) The Cryosphere 9 2 613 629 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir C. Lavoie E. W. Domack E. C. Pettit T. A. Scambos R. D. Larter H.-W. Schenke K. C. Yoo J. Gutt J. Wellner M. Canals J. B. Anderson D. Amblas Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery |
topic_facet |
geo envir |
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 |
C. Lavoie E. W. Domack E. C. Pettit T. A. Scambos R. D. Larter H.-W. Schenke K. C. Yoo J. Gutt J. Wellner M. Canals J. B. Anderson D. Amblas |
author_facet |
C. Lavoie E. W. Domack E. C. Pettit T. A. Scambos R. D. Larter H.-W. Schenke K. C. Yoo J. Gutt J. Wellner M. Canals J. B. Anderson D. Amblas |
author_sort |
C. Lavoie |
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 http://www.the-cryosphere.net/9/613/2015/tc-9-613-2015.pdf https://doaj.org/article/51abc47cedf24a15a80199ac716d99f4 |
long_lat |
ENVELOPE(-61.667,-61.667,-66.250,-66.250) ENVELOPE(-59.667,-59.667,-65.167,-65.167) ENVELOPE(-60.255,-60.255,-65.049,-65.049) |
geographic |
Antarctic Antarctic Peninsula Jason Peninsula Robertson Island Seal Nunataks |
geographic_facet |
Antarctic Antarctic Peninsula Jason Peninsula Robertson Island Seal Nunataks |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Robertson Island The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Robertson Island The Cryosphere |
op_source |
The Cryosphere, Vol 9, Iss 2, Pp 613-629 (2015) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-9-613-2015 http://www.the-cryosphere.net/9/613/2015/tc-9-613-2015.pdf https://doaj.org/article/51abc47cedf24a15a80199ac716d99f4 |
op_rights |
undefined |
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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1766267657218162688 |