Past ice-sheet flow east of Svalbard inferred from streamlined subglacial landforms
The pattern of late Weichselian (ca. 20 ka) ice flow in the northern Barents Sea is not well known, due mainly to a lack of marine data east of Svalbard. Several years with little summer sea ice have allowed acquisition of swath-bathymetric imagery of well-preserved subglacial landforms characterizi...
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ftloughboroughun:oai:figshare.com:article/9485777 2023-05-15T15:38:31+02:00 Past ice-sheet flow east of Svalbard inferred from streamlined subglacial landforms Julian A. Dowdeswell K.A. Hogan Jeffrey Evans R. Noormets Colm O Cofaigh D. Ottesen 2010-01-01T00:00:00Z https://figshare.com/articles/journal_contribution/Past_ice-sheet_flow_east_of_Svalbard_inferred_from_streamlined_subglacial_landforms/9485777 unknown 2134/13097 https://figshare.com/articles/journal_contribution/Past_ice-sheet_flow_east_of_Svalbard_inferred_from_streamlined_subglacial_landforms/9485777 CC BY-NC-ND 4.0 CC-BY-NC-ND Earth Sciences not elsewhere classified untagged Text Journal contribution 2010 ftloughboroughun 2022-01-01T20:32:20Z The pattern of late Weichselian (ca. 20 ka) ice flow in the northern Barents Sea is not well known, due mainly to a lack of marine data east of Svalbard. Several years with little summer sea ice have allowed acquisition of swath-bathymetric imagery of well-preserved subglacial landforms characterizing late Weichselian ice-flow directions over ∼150,000 km2 of the northwestern Barents Sea. We show that a major ice dome was located on easternmost Spitsbergen or southern Hinlopen Strait, at least 500 km west of its previously inferred position in the northern Barents Sea. This dome controlled the regional flow pattern; ice flowed eastward around Kong Karls Land into Franz Victoria Trough and north through Hinlopen Strait. An ice dome west of Kong Karls Land is required to explain the observed ice-flow pattern, but does not preclude an additional ice dome to the southeast. Discrepancies with earlier ice-sheet reconstructions reflect the lack of previous seafloor observations, with evidence limited mainly to past ice loading and postglacial rebound. The new pattern of ice-flow directions shows predominantly eastward rather than northward flow, with Franz Victoria Trough a major drainage pathway with a full-glacial balance flux of >40 km3 yr−1. Other Non-Article Part of Journal/Newspaper Barents Sea Hinlopen Strait Ice Sheet Kong Karls Land Sea ice Svalbard Spitsbergen Loughborough University: Figshare Barents Sea Kong Karls Land ENVELOPE(28.000,28.000,78.833,78.833) Svalbard |
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Open Polar |
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Loughborough University: Figshare |
op_collection_id |
ftloughboroughun |
language |
unknown |
topic |
Earth Sciences not elsewhere classified untagged |
spellingShingle |
Earth Sciences not elsewhere classified untagged Julian A. Dowdeswell K.A. Hogan Jeffrey Evans R. Noormets Colm O Cofaigh D. Ottesen Past ice-sheet flow east of Svalbard inferred from streamlined subglacial landforms |
topic_facet |
Earth Sciences not elsewhere classified untagged |
description |
The pattern of late Weichselian (ca. 20 ka) ice flow in the northern Barents Sea is not well known, due mainly to a lack of marine data east of Svalbard. Several years with little summer sea ice have allowed acquisition of swath-bathymetric imagery of well-preserved subglacial landforms characterizing late Weichselian ice-flow directions over ∼150,000 km2 of the northwestern Barents Sea. We show that a major ice dome was located on easternmost Spitsbergen or southern Hinlopen Strait, at least 500 km west of its previously inferred position in the northern Barents Sea. This dome controlled the regional flow pattern; ice flowed eastward around Kong Karls Land into Franz Victoria Trough and north through Hinlopen Strait. An ice dome west of Kong Karls Land is required to explain the observed ice-flow pattern, but does not preclude an additional ice dome to the southeast. Discrepancies with earlier ice-sheet reconstructions reflect the lack of previous seafloor observations, with evidence limited mainly to past ice loading and postglacial rebound. The new pattern of ice-flow directions shows predominantly eastward rather than northward flow, with Franz Victoria Trough a major drainage pathway with a full-glacial balance flux of >40 km3 yr−1. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Julian A. Dowdeswell K.A. Hogan Jeffrey Evans R. Noormets Colm O Cofaigh D. Ottesen |
author_facet |
Julian A. Dowdeswell K.A. Hogan Jeffrey Evans R. Noormets Colm O Cofaigh D. Ottesen |
author_sort |
Julian A. Dowdeswell |
title |
Past ice-sheet flow east of Svalbard inferred from streamlined subglacial landforms |
title_short |
Past ice-sheet flow east of Svalbard inferred from streamlined subglacial landforms |
title_full |
Past ice-sheet flow east of Svalbard inferred from streamlined subglacial landforms |
title_fullStr |
Past ice-sheet flow east of Svalbard inferred from streamlined subglacial landforms |
title_full_unstemmed |
Past ice-sheet flow east of Svalbard inferred from streamlined subglacial landforms |
title_sort |
past ice-sheet flow east of svalbard inferred from streamlined subglacial landforms |
publishDate |
2010 |
url |
https://figshare.com/articles/journal_contribution/Past_ice-sheet_flow_east_of_Svalbard_inferred_from_streamlined_subglacial_landforms/9485777 |
long_lat |
ENVELOPE(28.000,28.000,78.833,78.833) |
geographic |
Barents Sea Kong Karls Land Svalbard |
geographic_facet |
Barents Sea Kong Karls Land Svalbard |
genre |
Barents Sea Hinlopen Strait Ice Sheet Kong Karls Land Sea ice Svalbard Spitsbergen |
genre_facet |
Barents Sea Hinlopen Strait Ice Sheet Kong Karls Land Sea ice Svalbard Spitsbergen |
op_relation |
2134/13097 https://figshare.com/articles/journal_contribution/Past_ice-sheet_flow_east_of_Svalbard_inferred_from_streamlined_subglacial_landforms/9485777 |
op_rights |
CC BY-NC-ND 4.0 |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766369506947497984 |