Constraints on the Late Saalian to early Middle Weichselian ice sheet of Eurasia from field data and rebound modelling
Using glacial rebound models we have inverted observations of crustal rebound and shoreline locations to estimate the ice thickness for the major glaciations over northern Eurasia and to predict the palaeo-topography from late MIS-6 (the Late Saalian at c. 140 kyr BP) to MIS-4e (early Middle Weichse...
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/18944 2023-05-15T15:05:51+02:00 Constraints on the Late Saalian to early Middle Weichselian ice sheet of Eurasia from field data and rebound modelling Lambeck, Kurt Purcell, Anthony Funder, Svend Kjaer, Kurt H. Larsen, Eiliv Muller, Per 2015-12-07T22:18:42Z http://hdl.handle.net/1885/18944 unknown Taylor & Francis Group 0300-9483 http://hdl.handle.net/1885/18944 Boreas: an international journal of quaternary research Keywords: elevation glacial rebound glaciation ice sheet ice thickness paleotopography river basin Saalian sea level change shoreline Weichselian Aral Sea Arctic Ocean Asia Eurasia Europe Finland Kara Sea Komi Northern Europe Russian Federation Journal article 2015 ftanucanberra 2015-12-21T23:18:29Z Using glacial rebound models we have inverted observations of crustal rebound and shoreline locations to estimate the ice thickness for the major glaciations over northern Eurasia and to predict the palaeo-topography from late MIS-6 (the Late Saalian at c. 140 kyr BP) to MIS-4e (early Middle Weichselian at c. 64 kyr BP). During the Late Saalian, the ice extended across northern Europe and Russia with a broad dome centred from the Kara Sea to Karelia that reached a maximum thickness of c. 4500 m and ice surface elevation of c. 3500 m above sea level. A secondary dome occurred over Finland with ice thickness and surface elevation of 4000 m and 3000 m, respectively. When ice retreat commenced, and before the onset of the warm phase of the early Eemian, extensive marine flooding occurred from the Atlantic to the Urals and, once the ice retreated from the Urals, to the Taymyr Peninsula. The Baltic - White Sea connection is predicted to have closed at about 129 kyr BP, although large areas of arctic Russia remained submerged until the end of the Eemian. During the stadials (MIS-5d, 5b, 4) the maximum ice was centred over the Kara - Barents Seas with a thickness not exceeding c. 1200 m. Ice-dammed lakes and the elevations of sills are predicted for the major glacial phases and used to test the ice models. Large lakes are predicted for west Siberia at the end of the Saalian and during MIS-5d, 5b and 4, with the lake levels, margin locations and outlets depending inter alia on ice thickness and isostatic adjustment. During the Saalian and MIS-5d, 5b these lakes overflowed through the Turgay pass into the Aral Sea, but during MIS-4 the overflow is predicted to have occurred north of the Urals. West of the Urals the palaeo-lake predictions are strongly controlled by whether the Kara Ice Sheet dammed the White Sea. If it did, then the lake levels are controlled by the topography of the Dvina basin with overflow directed into the Kama - Volga river system. Comparisons of predicted with observed MIS-5b lake levels of Komi Lake favour models in which the White Sea was in contact with the Barents Sea. Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea dvina Ice Sheet Kara Sea karelia* karelia* Taymyr Taymyr Peninsula White Sea Siberia Australian National University: ANU Digital Collections Arctic Arctic Ocean Barents Sea Kara Sea White Sea Taymyr ENVELOPE(89.987,89.987,68.219,68.219) Kama ENVELOPE(162.251,162.251,57.375,57.375) |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: elevation glacial rebound glaciation ice sheet ice thickness paleotopography river basin Saalian sea level change shoreline Weichselian Aral Sea Arctic Ocean Asia Eurasia Europe Finland Kara Sea Komi Northern Europe Russian Federation |
spellingShingle |
Keywords: elevation glacial rebound glaciation ice sheet ice thickness paleotopography river basin Saalian sea level change shoreline Weichselian Aral Sea Arctic Ocean Asia Eurasia Europe Finland Kara Sea Komi Northern Europe Russian Federation Lambeck, Kurt Purcell, Anthony Funder, Svend Kjaer, Kurt H. Larsen, Eiliv Muller, Per Constraints on the Late Saalian to early Middle Weichselian ice sheet of Eurasia from field data and rebound modelling |
topic_facet |
Keywords: elevation glacial rebound glaciation ice sheet ice thickness paleotopography river basin Saalian sea level change shoreline Weichselian Aral Sea Arctic Ocean Asia Eurasia Europe Finland Kara Sea Komi Northern Europe Russian Federation |
description |
Using glacial rebound models we have inverted observations of crustal rebound and shoreline locations to estimate the ice thickness for the major glaciations over northern Eurasia and to predict the palaeo-topography from late MIS-6 (the Late Saalian at c. 140 kyr BP) to MIS-4e (early Middle Weichselian at c. 64 kyr BP). During the Late Saalian, the ice extended across northern Europe and Russia with a broad dome centred from the Kara Sea to Karelia that reached a maximum thickness of c. 4500 m and ice surface elevation of c. 3500 m above sea level. A secondary dome occurred over Finland with ice thickness and surface elevation of 4000 m and 3000 m, respectively. When ice retreat commenced, and before the onset of the warm phase of the early Eemian, extensive marine flooding occurred from the Atlantic to the Urals and, once the ice retreated from the Urals, to the Taymyr Peninsula. The Baltic - White Sea connection is predicted to have closed at about 129 kyr BP, although large areas of arctic Russia remained submerged until the end of the Eemian. During the stadials (MIS-5d, 5b, 4) the maximum ice was centred over the Kara - Barents Seas with a thickness not exceeding c. 1200 m. Ice-dammed lakes and the elevations of sills are predicted for the major glacial phases and used to test the ice models. Large lakes are predicted for west Siberia at the end of the Saalian and during MIS-5d, 5b and 4, with the lake levels, margin locations and outlets depending inter alia on ice thickness and isostatic adjustment. During the Saalian and MIS-5d, 5b these lakes overflowed through the Turgay pass into the Aral Sea, but during MIS-4 the overflow is predicted to have occurred north of the Urals. West of the Urals the palaeo-lake predictions are strongly controlled by whether the Kara Ice Sheet dammed the White Sea. If it did, then the lake levels are controlled by the topography of the Dvina basin with overflow directed into the Kama - Volga river system. Comparisons of predicted with observed MIS-5b lake levels of Komi Lake favour models in which the White Sea was in contact with the Barents Sea. |
format |
Article in Journal/Newspaper |
author |
Lambeck, Kurt Purcell, Anthony Funder, Svend Kjaer, Kurt H. Larsen, Eiliv Muller, Per |
author_facet |
Lambeck, Kurt Purcell, Anthony Funder, Svend Kjaer, Kurt H. Larsen, Eiliv Muller, Per |
author_sort |
Lambeck, Kurt |
title |
Constraints on the Late Saalian to early Middle Weichselian ice sheet of Eurasia from field data and rebound modelling |
title_short |
Constraints on the Late Saalian to early Middle Weichselian ice sheet of Eurasia from field data and rebound modelling |
title_full |
Constraints on the Late Saalian to early Middle Weichselian ice sheet of Eurasia from field data and rebound modelling |
title_fullStr |
Constraints on the Late Saalian to early Middle Weichselian ice sheet of Eurasia from field data and rebound modelling |
title_full_unstemmed |
Constraints on the Late Saalian to early Middle Weichselian ice sheet of Eurasia from field data and rebound modelling |
title_sort |
constraints on the late saalian to early middle weichselian ice sheet of eurasia from field data and rebound modelling |
publisher |
Taylor & Francis Group |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/18944 |
long_lat |
ENVELOPE(89.987,89.987,68.219,68.219) ENVELOPE(162.251,162.251,57.375,57.375) |
geographic |
Arctic Arctic Ocean Barents Sea Kara Sea White Sea Taymyr Kama |
geographic_facet |
Arctic Arctic Ocean Barents Sea Kara Sea White Sea Taymyr Kama |
genre |
Arctic Arctic Ocean Barents Sea dvina Ice Sheet Kara Sea karelia* karelia* Taymyr Taymyr Peninsula White Sea Siberia |
genre_facet |
Arctic Arctic Ocean Barents Sea dvina Ice Sheet Kara Sea karelia* karelia* Taymyr Taymyr Peninsula White Sea Siberia |
op_source |
Boreas: an international journal of quaternary research |
op_relation |
0300-9483 http://hdl.handle.net/1885/18944 |
_version_ |
1766337536611844096 |