Marine geomorphological record of Ice Sheet development in East Greenland since the Last Glacial Maximum
ABSTRACT Reconstructions of ice sheet development in East Greenland, since the Last Glacial Maximum (LGM), are poorly constrained. This study compiles swath bathymetric data from five expeditions, to investigate the geomorphology of three glacier outlet systems (Kejser Franz Joseph Fjord, Kong Oscar...
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crwiley:10.1002/jqs.3065 2024-06-02T08:05:55+00:00 Marine geomorphological record of Ice Sheet development in East Greenland since the Last Glacial Maximum Arndt, Jan Erik 2018 http://dx.doi.org/10.1002/jqs.3065 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.3065 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3065 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 33, issue 7, page 853-864 ISSN 0267-8179 1099-1417 journal-article 2018 crwiley https://doi.org/10.1002/jqs.3065 2024-05-03T11:56:56Z ABSTRACT Reconstructions of ice sheet development in East Greenland, since the Last Glacial Maximum (LGM), are poorly constrained. This study compiles swath bathymetric data from five expeditions, to investigate the geomorphology of three glacier outlet systems (Kejser Franz Joseph Fjord, Kong Oscar Fjord, and Scoresby Sund) and reconstruct the post‐LGM ice dynamics and extent. The landforms suggest that ice streams probably reached the shelf edge, via cross‐shelf troughs, in all three systems at the LGM. Off Scoresby Sund, it remains unresolved as to whether a mid‐shelf grounding zone wedge marks a recessional stage or the LGM extent. In the Allerød–Bølling interstadial, ice retreated to the fjord entrances at Kejser Franz Joseph Fjord and Kong Oscar Fjord, as documented by partly overridden terminal moraines, and most probably into the fjord at Scoresby Sund. Subsequent overriding occurred by ice readvance, probably in the Younger Dryas. Large ice‐marginal deposition features, formed on the mid‐shelf and at the entrance of Scoresby Sund, probably mark the maximum ice‐sheet extent after the readvance. Holocene retreat was rapid, except for two phases of stabilization at the entrance of Kong Oscar Fjord. Landslide debris indicates that at least one tsunami affected Scoresby Sund at some time in the Holocene. Article in Journal/Newspaper East Greenland glacier Greenland Ice Sheet Kejser Franz Joseph fjord Kong Oscar fjord Scoresby Sund Wiley Online Library Greenland Kejser Franz Joseph Fjord ENVELOPE(-23.601,-23.601,73.402,73.402) Kong Oscar Fjord ENVELOPE(-23.935,-23.935,72.361,72.361) Scoresby ENVELOPE(162.750,162.750,-66.567,-66.567) Scoresby Sund ENVELOPE(-24.387,-24.387,70.476,70.476) Sund ENVELOPE(13.644,13.644,66.207,66.207) Journal of Quaternary Science 33 7 853 864 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT Reconstructions of ice sheet development in East Greenland, since the Last Glacial Maximum (LGM), are poorly constrained. This study compiles swath bathymetric data from five expeditions, to investigate the geomorphology of three glacier outlet systems (Kejser Franz Joseph Fjord, Kong Oscar Fjord, and Scoresby Sund) and reconstruct the post‐LGM ice dynamics and extent. The landforms suggest that ice streams probably reached the shelf edge, via cross‐shelf troughs, in all three systems at the LGM. Off Scoresby Sund, it remains unresolved as to whether a mid‐shelf grounding zone wedge marks a recessional stage or the LGM extent. In the Allerød–Bølling interstadial, ice retreated to the fjord entrances at Kejser Franz Joseph Fjord and Kong Oscar Fjord, as documented by partly overridden terminal moraines, and most probably into the fjord at Scoresby Sund. Subsequent overriding occurred by ice readvance, probably in the Younger Dryas. Large ice‐marginal deposition features, formed on the mid‐shelf and at the entrance of Scoresby Sund, probably mark the maximum ice‐sheet extent after the readvance. Holocene retreat was rapid, except for two phases of stabilization at the entrance of Kong Oscar Fjord. Landslide debris indicates that at least one tsunami affected Scoresby Sund at some time in the Holocene. |
format |
Article in Journal/Newspaper |
author |
Arndt, Jan Erik |
spellingShingle |
Arndt, Jan Erik Marine geomorphological record of Ice Sheet development in East Greenland since the Last Glacial Maximum |
author_facet |
Arndt, Jan Erik |
author_sort |
Arndt, Jan Erik |
title |
Marine geomorphological record of Ice Sheet development in East Greenland since the Last Glacial Maximum |
title_short |
Marine geomorphological record of Ice Sheet development in East Greenland since the Last Glacial Maximum |
title_full |
Marine geomorphological record of Ice Sheet development in East Greenland since the Last Glacial Maximum |
title_fullStr |
Marine geomorphological record of Ice Sheet development in East Greenland since the Last Glacial Maximum |
title_full_unstemmed |
Marine geomorphological record of Ice Sheet development in East Greenland since the Last Glacial Maximum |
title_sort |
marine geomorphological record of ice sheet development in east greenland since the last glacial maximum |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/jqs.3065 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.3065 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3065 |
long_lat |
ENVELOPE(-23.601,-23.601,73.402,73.402) ENVELOPE(-23.935,-23.935,72.361,72.361) ENVELOPE(162.750,162.750,-66.567,-66.567) ENVELOPE(-24.387,-24.387,70.476,70.476) ENVELOPE(13.644,13.644,66.207,66.207) |
geographic |
Greenland Kejser Franz Joseph Fjord Kong Oscar Fjord Scoresby Scoresby Sund Sund |
geographic_facet |
Greenland Kejser Franz Joseph Fjord Kong Oscar Fjord Scoresby Scoresby Sund Sund |
genre |
East Greenland glacier Greenland Ice Sheet Kejser Franz Joseph fjord Kong Oscar fjord Scoresby Sund |
genre_facet |
East Greenland glacier Greenland Ice Sheet Kejser Franz Joseph fjord Kong Oscar fjord Scoresby Sund |
op_source |
Journal of Quaternary Science volume 33, issue 7, page 853-864 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.3065 |
container_title |
Journal of Quaternary Science |
container_volume |
33 |
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7 |
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853 |
op_container_end_page |
864 |
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1800750803730825216 |