Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway
This is the peer reviewed version of the following article: Laberg, J.S., Eilertsen, R.S. & Salomonsen, G.R. (2018) Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway. Boreas, 47 (1), 225-237, which has been published in final form at https://doi.org/10.1111/b...
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Online Access: | https://hdl.handle.net/10037/14744 https://doi.org/10.1111/bor.12261 |
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ftunivtroemsoe:oai:munin.uit.no:10037/14744 2023-05-15T16:12:55+02:00 Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway Laberg, Jan Sverre Eilertsen, Raymond S Salomonsen, Gaute R. 2017-05-18 https://hdl.handle.net/10037/14744 https://doi.org/10.1111/bor.12261 eng eng Wiley Boreas info:eu-repo/grantAgreement/RCN/SUPKUF/146540/Norway/Sedimentary Processes and Palaeoenvironment on Northern Continental Margins/SPONCOM/ Laberg, J.S., Eilertsen, R.S. & Salomonsen, G.R. (2018) Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway. Boreas, 47 (1), 225-237. https://doi.org/10.1111/bor.12261 FRIDAID 1624880 doi:10.1111/bor.12261 0300-9483 1502-3885 https://hdl.handle.net/10037/14744 openAccess VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 ice-rafted debris paleo-ice stream Northern Norway late Weichselian deglaciation recession rate Journal article Tidsskriftartikkel Peer reviewed 2017 ftunivtroemsoe https://doi.org/10.1111/bor.12261 2021-06-25T17:56:17Z This is the peer reviewed version of the following article: Laberg, J.S., Eilertsen, R.S. & Salomonsen, G.R. (2018) Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway. Boreas, 47 (1), 225-237, which has been published in final form at https://doi.org/10.1111/bor.12261 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions . Few well‐dated records of the deglacial dynamics of the large palaeo‐ice streams of the major Northern Hemisphere ice sheets are presently available, a prerequisite for an improved understanding of the ice‐sheet response to the climate warming of this period. Here we present a transect of gravity‐core samples through Trænadjupet and Vestfjorden, northern Norway, the location of the Trænadjupet – Vestfjorden palaeo‐ice stream of the NW sector of the Fennoscandian Ice Sheet. Initial ice recession from the shelf break to the coastal area (~400 km) occurred at an average rate of about 195 m a −1 , followed by two ice re‐advances, at 16.6–16.4 ka BP (the Røst re‐advance) and at 15.8–15.6 ka BP (the Værøy re‐advance), the former at an estimated ice‐advance rate of 216 m a −1 . The Røst re‐advance has been interpreted to be part of a climatically induced regional cold spell while the Værøy re‐advance was restricted to the Vestfjorden area and possibly formed as a consequence of internal ice‐sheet dynamics. Younger increases in IRD content have been correlated to the Skarpnes (Bølling – Older Dryas) and Tromsø – Lyngen (Younger Dryas) Events. Overall, the decaying Vestfjorden palaeo‐ice stream responded to the climatic fluctuations of this period but ice response due to internal reorganization is also suggested. Separating the two is important when evaluating the climatic response of the ice stream. As demonstrated here, the latter may be identified using a regional approach involving the study of several palaeo‐ice streams. The retreat rates reported here are of the same order of magnitude as rates reported for ice streams of the southern part of the Fennoscandian Ice Sheet, implying no latitudinal differences in ice response and retreat rate for this ~1000 km 2 sector of the Fennoscandian Ice Sheet (~60–68°N) during the climate warming of this period. Article in Journal/Newspaper Fennoscandian Ice Sheet Northern Norway Tromsø Vestfjorden Værøy Lyngen University of Tromsø: Munin Open Research Archive Bor ENVELOPE(126.850,126.850,61.750,61.750) Boreas ENVELOPE(-3.933,-3.933,-71.300,-71.300) Laberg ENVELOPE(17.820,17.820,68.862,68.862) Norway Røst ENVELOPE(11.983,11.983,67.467,67.467) Skarpnes ENVELOPE(7.816,7.816,63.405,63.405) Tromsø Værøy ENVELOPE(12.693,12.693,67.664,67.664) Boreas 47 1 225 237 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 ice-rafted debris paleo-ice stream Northern Norway late Weichselian deglaciation recession rate |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 ice-rafted debris paleo-ice stream Northern Norway late Weichselian deglaciation recession rate Laberg, Jan Sverre Eilertsen, Raymond S Salomonsen, Gaute R. Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 ice-rafted debris paleo-ice stream Northern Norway late Weichselian deglaciation recession rate |
description |
This is the peer reviewed version of the following article: Laberg, J.S., Eilertsen, R.S. & Salomonsen, G.R. (2018) Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway. Boreas, 47 (1), 225-237, which has been published in final form at https://doi.org/10.1111/bor.12261 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions . Few well‐dated records of the deglacial dynamics of the large palaeo‐ice streams of the major Northern Hemisphere ice sheets are presently available, a prerequisite for an improved understanding of the ice‐sheet response to the climate warming of this period. Here we present a transect of gravity‐core samples through Trænadjupet and Vestfjorden, northern Norway, the location of the Trænadjupet – Vestfjorden palaeo‐ice stream of the NW sector of the Fennoscandian Ice Sheet. Initial ice recession from the shelf break to the coastal area (~400 km) occurred at an average rate of about 195 m a −1 , followed by two ice re‐advances, at 16.6–16.4 ka BP (the Røst re‐advance) and at 15.8–15.6 ka BP (the Værøy re‐advance), the former at an estimated ice‐advance rate of 216 m a −1 . The Røst re‐advance has been interpreted to be part of a climatically induced regional cold spell while the Værøy re‐advance was restricted to the Vestfjorden area and possibly formed as a consequence of internal ice‐sheet dynamics. Younger increases in IRD content have been correlated to the Skarpnes (Bølling – Older Dryas) and Tromsø – Lyngen (Younger Dryas) Events. Overall, the decaying Vestfjorden palaeo‐ice stream responded to the climatic fluctuations of this period but ice response due to internal reorganization is also suggested. Separating the two is important when evaluating the climatic response of the ice stream. As demonstrated here, the latter may be identified using a regional approach involving the study of several palaeo‐ice streams. The retreat rates reported here are of the same order of magnitude as rates reported for ice streams of the southern part of the Fennoscandian Ice Sheet, implying no latitudinal differences in ice response and retreat rate for this ~1000 km 2 sector of the Fennoscandian Ice Sheet (~60–68°N) during the climate warming of this period. |
format |
Article in Journal/Newspaper |
author |
Laberg, Jan Sverre Eilertsen, Raymond S Salomonsen, Gaute R. |
author_facet |
Laberg, Jan Sverre Eilertsen, Raymond S Salomonsen, Gaute R. |
author_sort |
Laberg, Jan Sverre |
title |
Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway |
title_short |
Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway |
title_full |
Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway |
title_fullStr |
Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway |
title_full_unstemmed |
Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway |
title_sort |
deglacial dynamics of the vestfjorden - trænadjupet palaeo-ice stream, northern norway |
publisher |
Wiley |
publishDate |
2017 |
url |
https://hdl.handle.net/10037/14744 https://doi.org/10.1111/bor.12261 |
long_lat |
ENVELOPE(126.850,126.850,61.750,61.750) ENVELOPE(-3.933,-3.933,-71.300,-71.300) ENVELOPE(17.820,17.820,68.862,68.862) ENVELOPE(11.983,11.983,67.467,67.467) ENVELOPE(7.816,7.816,63.405,63.405) ENVELOPE(12.693,12.693,67.664,67.664) |
geographic |
Bor Boreas Laberg Norway Røst Skarpnes Tromsø Værøy |
geographic_facet |
Bor Boreas Laberg Norway Røst Skarpnes Tromsø Værøy |
genre |
Fennoscandian Ice Sheet Northern Norway Tromsø Vestfjorden Værøy Lyngen |
genre_facet |
Fennoscandian Ice Sheet Northern Norway Tromsø Vestfjorden Værøy Lyngen |
op_relation |
Boreas info:eu-repo/grantAgreement/RCN/SUPKUF/146540/Norway/Sedimentary Processes and Palaeoenvironment on Northern Continental Margins/SPONCOM/ Laberg, J.S., Eilertsen, R.S. & Salomonsen, G.R. (2018) Deglacial dynamics of the Vestfjorden - Trænadjupet palaeo-ice stream, northern Norway. Boreas, 47 (1), 225-237. https://doi.org/10.1111/bor.12261 FRIDAID 1624880 doi:10.1111/bor.12261 0300-9483 1502-3885 https://hdl.handle.net/10037/14744 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1111/bor.12261 |
container_title |
Boreas |
container_volume |
47 |
container_issue |
1 |
container_start_page |
225 |
op_container_end_page |
237 |
_version_ |
1765998518438199296 |