Numerical modelling of the Laurentide Ice Sheet in the Baffin Island region: the role of a Cumberland Sound ice stream
A numerical model reconstruction was made of the northeastern Laurentide Ice Sheet in the Baffin Island - Foxe Basin region using geophysical, terrestrial, and marine geologic evidence for initial and boundary conditions. The simulated ice sheet consists of a Foxe Dome with additional smaller Hall a...
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crcansciencepubl:10.1139/e99-027 2023-12-17T10:25:40+01:00 Numerical modelling of the Laurentide Ice Sheet in the Baffin Island region: the role of a Cumberland Sound ice stream Kaplan, Michael R Pfeffer, W Tad Sassolas, Christophe Miller, Gifford H 1999 http://dx.doi.org/10.1139/e99-027 http://www.nrcresearchpress.com/doi/pdf/10.1139/e99-027 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 36, issue 8, page 1315-1326 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1999 crcansciencepubl https://doi.org/10.1139/e99-027 2023-11-19T13:39:01Z A numerical model reconstruction was made of the northeastern Laurentide Ice Sheet in the Baffin Island - Foxe Basin region using geophysical, terrestrial, and marine geologic evidence for initial and boundary conditions. The simulated ice sheet consists of a Foxe Dome with additional smaller Hall and Amadjuak domes and a Penny Ice Divide. A specific objective was to determine boundary conditions that would allow advance of a marine-based low surface slope ice stream into and out of Cumberland Sound, a major marine embayment in the uplifted rim of the eastern Canadian Arctic (up to 1200 m deep), while maintaining ice free or nonsliding (e.g., cold-based) thin ice on adjacent plateaus of Cumberland Peninsula; this scenario accommodates interpretations based on terrestrial and marine studies in this region. After an initial ice-sheet configuration is placed on the eastern Arctic terrain, basal sliding is allowed in specified regions. Basal sliding below sea level and between the Foxe Dome and Cumberland Sound and a reasonable but critical initial ice sheet volume and dome surface elevation are needed to obtain advance along and out of Cumberland Sound. Rapid flow into Hudson Strait and along Cumberland Sound causes drawdown and a change in ice-sheet configuration. Although more Foxe Dome ice flows into western Hudson Strait than Cumberland Sound in the simulations, the latter may still have been an important conduit connecting the interior of the northeastern Laurentide Ice Sheet to the Labrador Sea, thereby affecting regional ice sheet dynamics, specifically ice surface elevations and flow paths. Article in Journal/Newspaper Arctic Baffin Island Baffin Cumberland Peninsula Cumberland Sound Foxe Basin Hudson Strait Ice Sheet Labrador Sea Canadian Science Publishing (via Crossref) Arctic Baffin Island Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) Foxe Basin ENVELOPE(-77.918,-77.918,65.931,65.931) Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Cumberland Peninsula ENVELOPE(-64.497,-64.497,66.501,66.501) Amadjuak ENVELOPE(-72.648,-72.648,64.017,64.017) Canadian Journal of Earth Sciences 36 8 1315 1326 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Kaplan, Michael R Pfeffer, W Tad Sassolas, Christophe Miller, Gifford H Numerical modelling of the Laurentide Ice Sheet in the Baffin Island region: the role of a Cumberland Sound ice stream |
topic_facet |
General Earth and Planetary Sciences |
description |
A numerical model reconstruction was made of the northeastern Laurentide Ice Sheet in the Baffin Island - Foxe Basin region using geophysical, terrestrial, and marine geologic evidence for initial and boundary conditions. The simulated ice sheet consists of a Foxe Dome with additional smaller Hall and Amadjuak domes and a Penny Ice Divide. A specific objective was to determine boundary conditions that would allow advance of a marine-based low surface slope ice stream into and out of Cumberland Sound, a major marine embayment in the uplifted rim of the eastern Canadian Arctic (up to 1200 m deep), while maintaining ice free or nonsliding (e.g., cold-based) thin ice on adjacent plateaus of Cumberland Peninsula; this scenario accommodates interpretations based on terrestrial and marine studies in this region. After an initial ice-sheet configuration is placed on the eastern Arctic terrain, basal sliding is allowed in specified regions. Basal sliding below sea level and between the Foxe Dome and Cumberland Sound and a reasonable but critical initial ice sheet volume and dome surface elevation are needed to obtain advance along and out of Cumberland Sound. Rapid flow into Hudson Strait and along Cumberland Sound causes drawdown and a change in ice-sheet configuration. Although more Foxe Dome ice flows into western Hudson Strait than Cumberland Sound in the simulations, the latter may still have been an important conduit connecting the interior of the northeastern Laurentide Ice Sheet to the Labrador Sea, thereby affecting regional ice sheet dynamics, specifically ice surface elevations and flow paths. |
format |
Article in Journal/Newspaper |
author |
Kaplan, Michael R Pfeffer, W Tad Sassolas, Christophe Miller, Gifford H |
author_facet |
Kaplan, Michael R Pfeffer, W Tad Sassolas, Christophe Miller, Gifford H |
author_sort |
Kaplan, Michael R |
title |
Numerical modelling of the Laurentide Ice Sheet in the Baffin Island region: the role of a Cumberland Sound ice stream |
title_short |
Numerical modelling of the Laurentide Ice Sheet in the Baffin Island region: the role of a Cumberland Sound ice stream |
title_full |
Numerical modelling of the Laurentide Ice Sheet in the Baffin Island region: the role of a Cumberland Sound ice stream |
title_fullStr |
Numerical modelling of the Laurentide Ice Sheet in the Baffin Island region: the role of a Cumberland Sound ice stream |
title_full_unstemmed |
Numerical modelling of the Laurentide Ice Sheet in the Baffin Island region: the role of a Cumberland Sound ice stream |
title_sort |
numerical modelling of the laurentide ice sheet in the baffin island region: the role of a cumberland sound ice stream |
publisher |
Canadian Science Publishing |
publishDate |
1999 |
url |
http://dx.doi.org/10.1139/e99-027 http://www.nrcresearchpress.com/doi/pdf/10.1139/e99-027 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) ENVELOPE(-77.918,-77.918,65.931,65.931) ENVELOPE(-66.014,-66.014,65.334,65.334) ENVELOPE(-64.497,-64.497,66.501,66.501) ENVELOPE(-72.648,-72.648,64.017,64.017) |
geographic |
Arctic Baffin Island Hudson Hudson Strait Foxe Basin Cumberland Sound Cumberland Peninsula Amadjuak |
geographic_facet |
Arctic Baffin Island Hudson Hudson Strait Foxe Basin Cumberland Sound Cumberland Peninsula Amadjuak |
genre |
Arctic Baffin Island Baffin Cumberland Peninsula Cumberland Sound Foxe Basin Hudson Strait Ice Sheet Labrador Sea |
genre_facet |
Arctic Baffin Island Baffin Cumberland Peninsula Cumberland Sound Foxe Basin Hudson Strait Ice Sheet Labrador Sea |
op_source |
Canadian Journal of Earth Sciences volume 36, issue 8, page 1315-1326 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e99-027 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
36 |
container_issue |
8 |
container_start_page |
1315 |
op_container_end_page |
1326 |
_version_ |
1785577318367887360 |