Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin
This is the peer reviewed version of the following article: Rüther, D. C., Winsborrow, M., Andreassen, K., & Forwick, M. (2017). Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin. Journal of Quaternary Science, 32(4), 463-474., which has been publis...
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fthsvestlandet:oai:hvlopen.brage.unit.no:11250/2607447 2024-03-03T08:43:05+00:00 Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin Rüther, Denise Christina Winsborrow, Monica Andreassen, Karin Forwick, Matthias 2017 application/pdf http://hdl.handle.net/11250/2607447 https://doi.org/10.1002/jqs.2939 eng eng Norges forskningsråd: 223259 Rüther, D. C., Winsborrow, M., Andreassen, K., & Forwick, M. (2017). Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin. Journal of Quaternary Science, 32(4), 463-474. urn:issn:0267-8179 http://hdl.handle.net/11250/2607447 https://doi.org/10.1002/jqs.2939 cristin:1472671 463-474 32 Journal of Quaternary Science 4 Peer reviewed Journal article 2017 fthsvestlandet https://doi.org/10.1002/jqs.2939 2024-02-02T12:40:29Z This is the peer reviewed version of the following article: Rüther, D. C., Winsborrow, M., Andreassen, K., & Forwick, M. (2017). Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin. Journal of Quaternary Science, 32(4), 463-474., which has been published in final form at https://doi.org/10.1002/jqs.2939. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Geomorphological evidence suggests that ice streams undergo frequent dynamic changes towards the end of their life cycles, but the associated sedimentary characteristics and processes remain poorly understood. Here, we present new sedimentological data from a Late Weichselian marine‐based ice stream in upper Bjørnøyrenna, northern Barents Sea, which experienced accelerated flow, intense calving of large icebergs, ice stream stagnation, ice shelf formation and disintegration. Observed till characteristics support the idea of spatially and temporally variable basal drag underneath ice streams. In addition, fast flow may have been accommodated in dilatant deforming till as well as through basal sliding over sticky spots of stiffer till. The grounding zone is shown to be highly transient and spatially variable during the final ice stream readvances, thus making the categories subglacial/proglacial of little value. In line with previous radiocarbon dates, we find that uppermost Bjørnøyrenna was deglaciated before ∼11.3–12.0k cal a BP. Finally, the provenances for the latest ice stream advance and an older ice flow event are inferred based on a novel way of using element geochemistry, helping define ice dome configuration in the northern Barents Sea. acceptedVersion Article in Journal/Newspaper Barents Sea Ice Shelf Høgskulen på Vestlandet: HVL Open Barents Sea Andreassen ENVELOPE(-57.769,-57.769,-63.899,-63.899) Journal of Quaternary Science 32 4 463 474 |
institution |
Open Polar |
collection |
Høgskulen på Vestlandet: HVL Open |
op_collection_id |
fthsvestlandet |
language |
English |
description |
This is the peer reviewed version of the following article: Rüther, D. C., Winsborrow, M., Andreassen, K., & Forwick, M. (2017). Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin. Journal of Quaternary Science, 32(4), 463-474., which has been published in final form at https://doi.org/10.1002/jqs.2939. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Geomorphological evidence suggests that ice streams undergo frequent dynamic changes towards the end of their life cycles, but the associated sedimentary characteristics and processes remain poorly understood. Here, we present new sedimentological data from a Late Weichselian marine‐based ice stream in upper Bjørnøyrenna, northern Barents Sea, which experienced accelerated flow, intense calving of large icebergs, ice stream stagnation, ice shelf formation and disintegration. Observed till characteristics support the idea of spatially and temporally variable basal drag underneath ice streams. In addition, fast flow may have been accommodated in dilatant deforming till as well as through basal sliding over sticky spots of stiffer till. The grounding zone is shown to be highly transient and spatially variable during the final ice stream readvances, thus making the categories subglacial/proglacial of little value. In line with previous radiocarbon dates, we find that uppermost Bjørnøyrenna was deglaciated before ∼11.3–12.0k cal a BP. Finally, the provenances for the latest ice stream advance and an older ice flow event are inferred based on a novel way of using element geochemistry, helping define ice dome configuration in the northern Barents Sea. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Rüther, Denise Christina Winsborrow, Monica Andreassen, Karin Forwick, Matthias |
spellingShingle |
Rüther, Denise Christina Winsborrow, Monica Andreassen, Karin Forwick, Matthias Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin |
author_facet |
Rüther, Denise Christina Winsborrow, Monica Andreassen, Karin Forwick, Matthias |
author_sort |
Rüther, Denise Christina |
title |
Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin |
title_short |
Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin |
title_full |
Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin |
title_fullStr |
Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin |
title_full_unstemmed |
Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin |
title_sort |
grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin |
publishDate |
2017 |
url |
http://hdl.handle.net/11250/2607447 https://doi.org/10.1002/jqs.2939 |
long_lat |
ENVELOPE(-57.769,-57.769,-63.899,-63.899) |
geographic |
Barents Sea Andreassen |
geographic_facet |
Barents Sea Andreassen |
genre |
Barents Sea Ice Shelf |
genre_facet |
Barents Sea Ice Shelf |
op_source |
463-474 32 Journal of Quaternary Science 4 |
op_relation |
Norges forskningsråd: 223259 Rüther, D. C., Winsborrow, M., Andreassen, K., & Forwick, M. (2017). Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin. Journal of Quaternary Science, 32(4), 463-474. urn:issn:0267-8179 http://hdl.handle.net/11250/2607447 https://doi.org/10.1002/jqs.2939 cristin:1472671 |
op_doi |
https://doi.org/10.1002/jqs.2939 |
container_title |
Journal of Quaternary Science |
container_volume |
32 |
container_issue |
4 |
container_start_page |
463 |
op_container_end_page |
474 |
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1792498515875725312 |