GIS‐based reconstruction of Late Weichselian proglacial lakes in northwestern Russia and Belarus
Reconstructing ice‐lake histories is of considerable importance for understanding deglacial meltwater budgets and the role of meltwater reservoirs for sea‐level rise in response to climate warming. We used the latest data on chronology and ice‐sheet extents combined with an isostatically adjusted di...
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crwiley:10.1111/bor.12223 2024-06-23T07:53:04+00:00 GIS‐based reconstruction of Late Weichselian proglacial lakes in northwestern Russia and Belarus Gorlach, Aleksandr Hang, Tiit Kalm, Volli European Social Fund Russian Science Foundation Eesti Teadusfondi 2017 http://dx.doi.org/10.1111/bor.12223 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12223 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12223 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 46, issue 3, page 486-502 ISSN 0300-9483 1502-3885 journal-article 2017 crwiley https://doi.org/10.1111/bor.12223 2024-06-13T04:22:27Z Reconstructing ice‐lake histories is of considerable importance for understanding deglacial meltwater budgets and the role of meltwater reservoirs for sea‐level rise in response to climate warming. We used the latest data on chronology and ice‐sheet extents combined with an isostatically adjusted digital elevation model to reconstruct the development of proglacial lakes in the area of the Karelian ice stream complex of the Late Weichselian Scandinavian Ice Sheet on the East European Plain. We derived the deglacial ice lake development in seven time‐slices from 19 to 13.8 ka, assuming the individual ice‐marginal positions to be isochronous throughout the studied domain. Modelling is based on mapping of critical drainage thresholds and filling the depressions that are potentially able to hold meltwater. Such an approach underestimates the real dimensions of the ice lakes, because the role of erosion at the thresholds is not considered. Our modelling approach is sensitive to the (local) ice‐margin location. Our results prove the southward drainage of meltwater during the glacier extent maxima and at the beginning of deglaciation whereas rerouting to the west had taken place already around 17.5 ka, which is some 1.5 ka earlier than hitherto supposed. The total ice‐lake volume in the study area was lowest (~300 km 3 ) during the maximum glacier extent and highest (~2000 km 3 ) during the highstand of the Privalday Lake at c. 14.6 ka. At 14.6–14.4 ka, the Privalday Lake drained to the early Baltic Ice Lake. The released ~1500 km 3 of water approximately corresponds to 20% of the early Baltic Ice Lake water volume and therefore it is unlikely that it was accommodated there. Thus, we argue that the additional meltwater drained through the Öresund threshold area between the early Baltic Ice Lake and the sea, becoming a part of the Scandinavian Ice Sheet's contribution to the Meltwater Pulse 1A event. Article in Journal/Newspaper glacier Ice Sheet karelia* karelian Wiley Online Library Ice Lakes ENVELOPE(-131.345,-131.345,60.413,60.413) Boreas 46 3 486 502 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Reconstructing ice‐lake histories is of considerable importance for understanding deglacial meltwater budgets and the role of meltwater reservoirs for sea‐level rise in response to climate warming. We used the latest data on chronology and ice‐sheet extents combined with an isostatically adjusted digital elevation model to reconstruct the development of proglacial lakes in the area of the Karelian ice stream complex of the Late Weichselian Scandinavian Ice Sheet on the East European Plain. We derived the deglacial ice lake development in seven time‐slices from 19 to 13.8 ka, assuming the individual ice‐marginal positions to be isochronous throughout the studied domain. Modelling is based on mapping of critical drainage thresholds and filling the depressions that are potentially able to hold meltwater. Such an approach underestimates the real dimensions of the ice lakes, because the role of erosion at the thresholds is not considered. Our modelling approach is sensitive to the (local) ice‐margin location. Our results prove the southward drainage of meltwater during the glacier extent maxima and at the beginning of deglaciation whereas rerouting to the west had taken place already around 17.5 ka, which is some 1.5 ka earlier than hitherto supposed. The total ice‐lake volume in the study area was lowest (~300 km 3 ) during the maximum glacier extent and highest (~2000 km 3 ) during the highstand of the Privalday Lake at c. 14.6 ka. At 14.6–14.4 ka, the Privalday Lake drained to the early Baltic Ice Lake. The released ~1500 km 3 of water approximately corresponds to 20% of the early Baltic Ice Lake water volume and therefore it is unlikely that it was accommodated there. Thus, we argue that the additional meltwater drained through the Öresund threshold area between the early Baltic Ice Lake and the sea, becoming a part of the Scandinavian Ice Sheet's contribution to the Meltwater Pulse 1A event. |
author2 |
European Social Fund Russian Science Foundation Eesti Teadusfondi |
format |
Article in Journal/Newspaper |
author |
Gorlach, Aleksandr Hang, Tiit Kalm, Volli |
spellingShingle |
Gorlach, Aleksandr Hang, Tiit Kalm, Volli GIS‐based reconstruction of Late Weichselian proglacial lakes in northwestern Russia and Belarus |
author_facet |
Gorlach, Aleksandr Hang, Tiit Kalm, Volli |
author_sort |
Gorlach, Aleksandr |
title |
GIS‐based reconstruction of Late Weichselian proglacial lakes in northwestern Russia and Belarus |
title_short |
GIS‐based reconstruction of Late Weichselian proglacial lakes in northwestern Russia and Belarus |
title_full |
GIS‐based reconstruction of Late Weichselian proglacial lakes in northwestern Russia and Belarus |
title_fullStr |
GIS‐based reconstruction of Late Weichselian proglacial lakes in northwestern Russia and Belarus |
title_full_unstemmed |
GIS‐based reconstruction of Late Weichselian proglacial lakes in northwestern Russia and Belarus |
title_sort |
gis‐based reconstruction of late weichselian proglacial lakes in northwestern russia and belarus |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1111/bor.12223 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12223 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12223 |
long_lat |
ENVELOPE(-131.345,-131.345,60.413,60.413) |
geographic |
Ice Lakes |
geographic_facet |
Ice Lakes |
genre |
glacier Ice Sheet karelia* karelian |
genre_facet |
glacier Ice Sheet karelia* karelian |
op_source |
Boreas volume 46, issue 3, page 486-502 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/bor.12223 |
container_title |
Boreas |
container_volume |
46 |
container_issue |
3 |
container_start_page |
486 |
op_container_end_page |
502 |
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1802644548152721408 |