The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting
Submarine channel systems on and off glaciated continental margins can be up to hundreds of kilometres long, tens of kilometres wide and hundreds of metres deep. They result from repeated erosion and various downslope processes predominantly during glacial periods and can, therefore, provide valuabl...
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ftawi:oai:epic.awi.de:39388 2024-09-15T18:12:28+00:00 The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting Forwick, Matthias Laberg, Jan Sverre Hass, H. Christian Osti, Giacomo 2015-11-23 https://epic.awi.de/id/eprint/39388/ https://hdl.handle.net/10013/epic.46639 unknown Springer Forwick, M. , Laberg, J. S. , Hass, H. C. orcid:0000-0003-2649-6828 and Osti, G. (2015) The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting , Arktos, 1 (1) . doi:10.1007/s41063-015-0018-4 <https://doi.org/10.1007/s41063-015-0018-4> , hdl:10013/epic.46639 EPIC3Arktos, Springer, 1(1), ISSN: 2364-9453 Article isiRev 2015 ftawi https://doi.org/10.1007/s41063-015-0018-4 2024-06-24T04:13:16Z Submarine channel systems on and off glaciated continental margins can be up to hundreds of kilometres long, tens of kilometres wide and hundreds of metres deep. They result from repeated erosion and various downslope processes predominantly during glacial periods and can, therefore, provide valuable tools for the reconstruction of past ice-sheet dynamics. The Kongsfjorden Channel System (KCS) on the continental slope off northwest Svalbard provides evidence that downslope sedimentary processes are locally more dominant than regional along-slope sedimentation. It is a relatively short channel system (*120 km) that occurs at a large range of water depths (*250–4000 m) with slope gradients varying between 0 and 20. Multiple gullies on the Kongsfjorden Trough Mouth Fan merge to small channels that further merge to a main channel. The overall location of the channel system is controlled by variations in slope gradients and the ambient regional bathymetry. The widest and deepest incisions occur in areas of the steepest slope gradients. The KCS has probably been active since *1 Ma when glacial activity on Svalbard increased and grounded ice expanded to the shelf break off Kongsfjorden repeatedly. Activity within the system was probably highest during glacials. However, reduced activity presumably took place also during interglacials. Article in Journal/Newspaper Ice Sheet Kongsfjord* Kongsfjorden Svalbard Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) arktos 1 1 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Submarine channel systems on and off glaciated continental margins can be up to hundreds of kilometres long, tens of kilometres wide and hundreds of metres deep. They result from repeated erosion and various downslope processes predominantly during glacial periods and can, therefore, provide valuable tools for the reconstruction of past ice-sheet dynamics. The Kongsfjorden Channel System (KCS) on the continental slope off northwest Svalbard provides evidence that downslope sedimentary processes are locally more dominant than regional along-slope sedimentation. It is a relatively short channel system (*120 km) that occurs at a large range of water depths (*250–4000 m) with slope gradients varying between 0 and 20. Multiple gullies on the Kongsfjorden Trough Mouth Fan merge to small channels that further merge to a main channel. The overall location of the channel system is controlled by variations in slope gradients and the ambient regional bathymetry. The widest and deepest incisions occur in areas of the steepest slope gradients. The KCS has probably been active since *1 Ma when glacial activity on Svalbard increased and grounded ice expanded to the shelf break off Kongsfjorden repeatedly. Activity within the system was probably highest during glacials. However, reduced activity presumably took place also during interglacials. |
format |
Article in Journal/Newspaper |
author |
Forwick, Matthias Laberg, Jan Sverre Hass, H. Christian Osti, Giacomo |
spellingShingle |
Forwick, Matthias Laberg, Jan Sverre Hass, H. Christian Osti, Giacomo The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting |
author_facet |
Forwick, Matthias Laberg, Jan Sverre Hass, H. Christian Osti, Giacomo |
author_sort |
Forwick, Matthias |
title |
The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting |
title_short |
The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting |
title_full |
The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting |
title_fullStr |
The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting |
title_full_unstemmed |
The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting |
title_sort |
kongsfjorden channel system offshore nw svalbard: downslope sedimentary processes in a contour-current-dominated setting |
publisher |
Springer |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/39388/ https://hdl.handle.net/10013/epic.46639 |
genre |
Ice Sheet Kongsfjord* Kongsfjorden Svalbard |
genre_facet |
Ice Sheet Kongsfjord* Kongsfjorden Svalbard |
op_source |
EPIC3Arktos, Springer, 1(1), ISSN: 2364-9453 |
op_relation |
Forwick, M. , Laberg, J. S. , Hass, H. C. orcid:0000-0003-2649-6828 and Osti, G. (2015) The Kongsfjorden Channel System offshore NW Svalbard: downslope sedimentary processes in a contour-current-dominated setting , Arktos, 1 (1) . doi:10.1007/s41063-015-0018-4 <https://doi.org/10.1007/s41063-015-0018-4> , hdl:10013/epic.46639 |
op_doi |
https://doi.org/10.1007/s41063-015-0018-4 |
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1 |
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1810450052301193216 |