The start of a major sea-level rise indicates that icesheet expansion in western Norway commenced before the Younger Dryas
Published as: Sea-level fluctuations imply that the Younger Dryas ice-sheet expansion in western Norway commenced during the Allerod The relative sea level rose 10 m on Sotra, western Norway, during the Younger Dryas (YD). Based on dating of isolation basins, the transgression started in late Allerø...
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Online Access: | https://hdl.handle.net/1956/1179 https://doi.org/10.1016/j.quascirev.2007.04.008 |
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ftunivbergen:oai:bora.uib.no:1956/1179 2023-05-15T16:40:22+02:00 The start of a major sea-level rise indicates that icesheet expansion in western Norway commenced before the Younger Dryas Lohne, Øystein S. Bondevik, Stein Mangerud, Jan Svendsen, John-Inge 2007 1753070 bytes application/pdf https://hdl.handle.net/1956/1179 https://doi.org/10.1016/j.quascirev.2007.04.008 eng eng Elsevier urn:issn:0277-3791 urn:issn:1873-457X https://hdl.handle.net/1956/1179 https://doi.org/10.1016/j.quascirev.2007.04.008 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article 2007 ftunivbergen https://doi.org/10.1016/j.quascirev.2007.04.008 2023-03-14T17:43:14Z Published as: Sea-level fluctuations imply that the Younger Dryas ice-sheet expansion in western Norway commenced during the Allerod The relative sea level rose 10 m on Sotra, western Norway, during the Younger Dryas (YD). Based on dating of isolation basins, the transgression started in late Allerød at ~13 110 and ended in late YD at ~11 780 cal yr BP, with an average sea-level rise of ~7 mm yr-1. Between ~11 780 and ~11 560 cal yr BP the relative sea level was stable. Shortly after the YD/Holocene boundary the sea level rapidly fell 37 m at ~23 mm yr-1. The shorelines for the regression minimum in Allerød and the transgression maximum in YD are almost parallel with tilt of 1.2-1.4 m km-1, indicating that no isostatic tilting, and thus neither uplift or depression occurred during the sea-level rise. We conclude that the transgression was caused by a YD ice-sheet re-advance mapped in the same area. This stopped the isostatic uplift and increased the gravitational attraction on the sea elevating the geoid in this area. There may also been a contribution from rising glacio-eustatic sea level. Our results show that the transgression started around 13 110 cal yr BP. Thus, we conclude that the YD ice-sheet advance in western Norway started before the onset of the YD. submittedVersion Article in Journal/Newspaper Ice Sheet University of Bergen: Bergen Open Research Archive (BORA-UiB) Norway Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Quaternary Science Reviews 26 17-18 2128 2151 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Lohne, Øystein S. Bondevik, Stein Mangerud, Jan Svendsen, John-Inge The start of a major sea-level rise indicates that icesheet expansion in western Norway commenced before the Younger Dryas |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
description |
Published as: Sea-level fluctuations imply that the Younger Dryas ice-sheet expansion in western Norway commenced during the Allerod The relative sea level rose 10 m on Sotra, western Norway, during the Younger Dryas (YD). Based on dating of isolation basins, the transgression started in late Allerød at ~13 110 and ended in late YD at ~11 780 cal yr BP, with an average sea-level rise of ~7 mm yr-1. Between ~11 780 and ~11 560 cal yr BP the relative sea level was stable. Shortly after the YD/Holocene boundary the sea level rapidly fell 37 m at ~23 mm yr-1. The shorelines for the regression minimum in Allerød and the transgression maximum in YD are almost parallel with tilt of 1.2-1.4 m km-1, indicating that no isostatic tilting, and thus neither uplift or depression occurred during the sea-level rise. We conclude that the transgression was caused by a YD ice-sheet re-advance mapped in the same area. This stopped the isostatic uplift and increased the gravitational attraction on the sea elevating the geoid in this area. There may also been a contribution from rising glacio-eustatic sea level. Our results show that the transgression started around 13 110 cal yr BP. Thus, we conclude that the YD ice-sheet advance in western Norway started before the onset of the YD. submittedVersion |
format |
Article in Journal/Newspaper |
author |
Lohne, Øystein S. Bondevik, Stein Mangerud, Jan Svendsen, John-Inge |
author_facet |
Lohne, Øystein S. Bondevik, Stein Mangerud, Jan Svendsen, John-Inge |
author_sort |
Lohne, Øystein S. |
title |
The start of a major sea-level rise indicates that icesheet expansion in western Norway commenced before the Younger Dryas |
title_short |
The start of a major sea-level rise indicates that icesheet expansion in western Norway commenced before the Younger Dryas |
title_full |
The start of a major sea-level rise indicates that icesheet expansion in western Norway commenced before the Younger Dryas |
title_fullStr |
The start of a major sea-level rise indicates that icesheet expansion in western Norway commenced before the Younger Dryas |
title_full_unstemmed |
The start of a major sea-level rise indicates that icesheet expansion in western Norway commenced before the Younger Dryas |
title_sort |
start of a major sea-level rise indicates that icesheet expansion in western norway commenced before the younger dryas |
publisher |
Elsevier |
publishDate |
2007 |
url |
https://hdl.handle.net/1956/1179 https://doi.org/10.1016/j.quascirev.2007.04.008 |
long_lat |
ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Norway Tilting |
geographic_facet |
Norway Tilting |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
urn:issn:0277-3791 urn:issn:1873-457X https://hdl.handle.net/1956/1179 https://doi.org/10.1016/j.quascirev.2007.04.008 |
op_doi |
https://doi.org/10.1016/j.quascirev.2007.04.008 |
container_title |
Quaternary Science Reviews |
container_volume |
26 |
container_issue |
17-18 |
container_start_page |
2128 |
op_container_end_page |
2151 |
_version_ |
1766030763120132096 |