Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea
Abstract Proglacial braided river systems discharge large volumes of meltwater from ice sheets and transport coarse-grained sediments from the glaciated areas to the oceans. Here, we test the hypothesis if high-energy hydrological events can leave distinctive signatures in the sedimentary record of...
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ftoslouniv:oai:www.duo.uio.no:10852/84507 2023-05-15T14:02:31+02:00 Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea Bellwald, Benjamin Planke, Sverre Polteau, Stephane Lebedeva-Ivanova, Nina Faleide, Jan Inge Zengaffinen-Morris, Sunniva Margrethe Morse, Stephen Castelltort, Sébastien 2021-02-11T12:02:05Z http://hdl.handle.net/10852/84507 http://urn.nb.no/URN:NBN:no-87273 https://doi.org/10.1017/jog.2020.115 EN eng NFR/228107 http://urn.nb.no/URN:NBN:no-87273 Bellwald, Benjamin Planke, Sverre Polteau, Stephane Lebedeva-Ivanova, Nina Faleide, Jan Inge Zengaffinen-Morris, Sunniva Margrethe Morse, Stephen Castelltort, Sébastien . Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea. Journal of Glaciology. 2020, 1-17 http://hdl.handle.net/10852/84507 1888807 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Glaciology&rft.volume=&rft.spage=1&rft.date=2020 Journal of Glaciology 1 17 https://doi.org/10.1017/jog.2020.115 URN:NBN:no-87273 Fulltext https://www.duo.uio.no/bitstream/handle/10852/84507/2/characterization-of-a-glacial-paleo-outburst-flood-using-high-resolution-3-d-seismic-data-bjoernelva-river-valley-sw-barents-sea.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 0022-1430 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2021 ftoslouniv https://doi.org/10.1017/jog.2020.115 2021-03-24T23:31:05Z Abstract Proglacial braided river systems discharge large volumes of meltwater from ice sheets and transport coarse-grained sediments from the glaciated areas to the oceans. Here, we test the hypothesis if high-energy hydrological events can leave distinctive signatures in the sedimentary record of braided river systems. We characterize the morphology and infer a mode of formation of a 25 km long and 1–3 km wide Early Pleistocene incised valley recently imaged in 3-D seismic data in the Hoop area, SW Barents Sea. The fluvial system, named Bjørnelva River Valley, carved 20 m deep channels into Lower Cretaceous bedrock at a glacial paleo-surface and deposited 28 channel bars along a paleo-slope gradient of ~0.64 m km −1 . The landform morphologies and position relative to the paleo-surface support that Bjørnelva River Valley was formed in the proglacial domain of the Barents Sea Ice Sheet. Based on valley width and valley depth, we suggest that Bjørnelva River Valley represents a braided river system fed by violent outburst floods from a glacial lake, with estimated outburst discharges of ~160 000 m 3 s −1 . The morphological configuration of Bjørnelva River Valley can inform geohazard assessments in areas at risk of outburst flooding today and is an analogue for landscapes evolving in areas currently covered by the Greenland and Antarctic ice sheets. Article in Journal/Newspaper Antarc* Antarctic Barents Sea Greenland Ice Sheet Journal of Glaciology Sea ice Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Antarctic Barents Sea Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Greenland Journal of Glaciology 67 263 404 420 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Abstract Proglacial braided river systems discharge large volumes of meltwater from ice sheets and transport coarse-grained sediments from the glaciated areas to the oceans. Here, we test the hypothesis if high-energy hydrological events can leave distinctive signatures in the sedimentary record of braided river systems. We characterize the morphology and infer a mode of formation of a 25 km long and 1–3 km wide Early Pleistocene incised valley recently imaged in 3-D seismic data in the Hoop area, SW Barents Sea. The fluvial system, named Bjørnelva River Valley, carved 20 m deep channels into Lower Cretaceous bedrock at a glacial paleo-surface and deposited 28 channel bars along a paleo-slope gradient of ~0.64 m km −1 . The landform morphologies and position relative to the paleo-surface support that Bjørnelva River Valley was formed in the proglacial domain of the Barents Sea Ice Sheet. Based on valley width and valley depth, we suggest that Bjørnelva River Valley represents a braided river system fed by violent outburst floods from a glacial lake, with estimated outburst discharges of ~160 000 m 3 s −1 . The morphological configuration of Bjørnelva River Valley can inform geohazard assessments in areas at risk of outburst flooding today and is an analogue for landscapes evolving in areas currently covered by the Greenland and Antarctic ice sheets. |
format |
Article in Journal/Newspaper |
author |
Bellwald, Benjamin Planke, Sverre Polteau, Stephane Lebedeva-Ivanova, Nina Faleide, Jan Inge Zengaffinen-Morris, Sunniva Margrethe Morse, Stephen Castelltort, Sébastien |
spellingShingle |
Bellwald, Benjamin Planke, Sverre Polteau, Stephane Lebedeva-Ivanova, Nina Faleide, Jan Inge Zengaffinen-Morris, Sunniva Margrethe Morse, Stephen Castelltort, Sébastien Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea |
author_facet |
Bellwald, Benjamin Planke, Sverre Polteau, Stephane Lebedeva-Ivanova, Nina Faleide, Jan Inge Zengaffinen-Morris, Sunniva Margrethe Morse, Stephen Castelltort, Sébastien |
author_sort |
Bellwald, Benjamin |
title |
Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea |
title_short |
Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea |
title_full |
Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea |
title_fullStr |
Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea |
title_full_unstemmed |
Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea |
title_sort |
characterization of a glacial paleo-outburst flood using high-resolution 3-d seismic data: bjørnelva river valley, sw barents sea |
publishDate |
2021 |
url |
http://hdl.handle.net/10852/84507 http://urn.nb.no/URN:NBN:no-87273 https://doi.org/10.1017/jog.2020.115 |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Antarctic Barents Sea Glacial Lake Greenland |
geographic_facet |
Antarctic Barents Sea Glacial Lake Greenland |
genre |
Antarc* Antarctic Barents Sea Greenland Ice Sheet Journal of Glaciology Sea ice |
genre_facet |
Antarc* Antarctic Barents Sea Greenland Ice Sheet Journal of Glaciology Sea ice |
op_source |
0022-1430 |
op_relation |
NFR/228107 http://urn.nb.no/URN:NBN:no-87273 Bellwald, Benjamin Planke, Sverre Polteau, Stephane Lebedeva-Ivanova, Nina Faleide, Jan Inge Zengaffinen-Morris, Sunniva Margrethe Morse, Stephen Castelltort, Sébastien . Characterization of a glacial paleo-outburst flood using high-resolution 3-D seismic data: Bjørnelva River Valley, SW Barents Sea. Journal of Glaciology. 2020, 1-17 http://hdl.handle.net/10852/84507 1888807 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Glaciology&rft.volume=&rft.spage=1&rft.date=2020 Journal of Glaciology 1 17 https://doi.org/10.1017/jog.2020.115 URN:NBN:no-87273 Fulltext https://www.duo.uio.no/bitstream/handle/10852/84507/2/characterization-of-a-glacial-paleo-outburst-flood-using-high-resolution-3-d-seismic-data-bjoernelva-river-valley-sw-barents-sea.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1017/jog.2020.115 |
container_title |
Journal of Glaciology |
container_volume |
67 |
container_issue |
263 |
container_start_page |
404 |
op_container_end_page |
420 |
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1766272836481056768 |