Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum
In order to reconstruct the palaeoglaciation in Fennoscandia and northern Asia during the late-Weichselian ice-age phase, simulations with the dynamic and thermodynamic ice-sheet model SICOPOLIS are carried out. Our focus is on the Last Glacial Maximum (LGM) around 20 kyr BP. Climate forcing is base...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/34574 2023-05-15T13:29:12+02:00 Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum Forsström, Pirjo-Leena Sallasmaa, Olli Greve, Ralf Zwinger, Thomas http://hdl.handle.net/2115/34574 https://doi.org/10.3189/172756403781815500 eng eng International Glaciological Society http://www.igsoc.org/ http://hdl.handle.net/2115/34574 Annals of Glaciology, 37(1): 383-389 http://dx.doi.org/10.3189/172756403781815500 © 2003 International Glaciological Society Fennoscandian ice sheet Scandinavian ice sheet Last Glacial Maximum Fast flow Ice stream 452 article fthokunivhus https://doi.org/10.3189/172756403781815500 2022-11-18T01:01:37Z In order to reconstruct the palaeoglaciation in Fennoscandia and northern Asia during the late-Weichselian ice-age phase, simulations with the dynamic and thermodynamic ice-sheet model SICOPOLIS are carried out. Our focus is on the Last Glacial Maximum (LGM) around 20 kyr BP. Climate forcing is based on mean annual surface temperature and precipitation derived from present data and Palaeoclimatic Modelling Intercomparison Project (PMIP) UKMO21 results for the LGM. These distributions are interpolated via a glacial index defined by the Greenland Icecore Project (GRIP) δ18 O record. The extent of the Scandinavian and the Barents ice sheets is reproduced in good agreement with the Quaternary Environments of the Eurasian North (QUEEN) reconstruction, but the Kara Sea and Taymyr Peninsula areas are excessively glaciated. The fast-flow regions derived from the simulations, which are generally connected to regions with a temperate base and temperate ice above, are compared to hypothesized palaeoice-stream locations, especially in the Norwegian Channel and the Baltic area. In the Norwegian Channel, temperate basal conditions with temperate ice above prevail and favour fast flow. In the Baltic area, ice-sheet advance is generally accompanied by slow ice velocities (<200 m a-1). Some temporary fast-flow features occur due to transitional temperate-base conditions, and higher velocities arise in retreat phases. Article in Journal/Newspaper Annals of Glaciology Fennoscandia Fennoscandian Greenland GRIP Ice Sheet Kara Sea Taymyr Taymyr Peninsula Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Greenland Kara Sea Taymyr ENVELOPE(89.987,89.987,68.219,68.219) Annals of Glaciology 37 383 389 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Fennoscandian ice sheet Scandinavian ice sheet Last Glacial Maximum Fast flow Ice stream 452 |
spellingShingle |
Fennoscandian ice sheet Scandinavian ice sheet Last Glacial Maximum Fast flow Ice stream 452 Forsström, Pirjo-Leena Sallasmaa, Olli Greve, Ralf Zwinger, Thomas Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum |
topic_facet |
Fennoscandian ice sheet Scandinavian ice sheet Last Glacial Maximum Fast flow Ice stream 452 |
description |
In order to reconstruct the palaeoglaciation in Fennoscandia and northern Asia during the late-Weichselian ice-age phase, simulations with the dynamic and thermodynamic ice-sheet model SICOPOLIS are carried out. Our focus is on the Last Glacial Maximum (LGM) around 20 kyr BP. Climate forcing is based on mean annual surface temperature and precipitation derived from present data and Palaeoclimatic Modelling Intercomparison Project (PMIP) UKMO21 results for the LGM. These distributions are interpolated via a glacial index defined by the Greenland Icecore Project (GRIP) δ18 O record. The extent of the Scandinavian and the Barents ice sheets is reproduced in good agreement with the Quaternary Environments of the Eurasian North (QUEEN) reconstruction, but the Kara Sea and Taymyr Peninsula areas are excessively glaciated. The fast-flow regions derived from the simulations, which are generally connected to regions with a temperate base and temperate ice above, are compared to hypothesized palaeoice-stream locations, especially in the Norwegian Channel and the Baltic area. In the Norwegian Channel, temperate basal conditions with temperate ice above prevail and favour fast flow. In the Baltic area, ice-sheet advance is generally accompanied by slow ice velocities (<200 m a-1). Some temporary fast-flow features occur due to transitional temperate-base conditions, and higher velocities arise in retreat phases. |
format |
Article in Journal/Newspaper |
author |
Forsström, Pirjo-Leena Sallasmaa, Olli Greve, Ralf Zwinger, Thomas |
author_facet |
Forsström, Pirjo-Leena Sallasmaa, Olli Greve, Ralf Zwinger, Thomas |
author_sort |
Forsström, Pirjo-Leena |
title |
Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum |
title_short |
Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum |
title_full |
Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum |
title_fullStr |
Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum |
title_full_unstemmed |
Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum |
title_sort |
simulation of fast-flow features of the fennoscandian ice sheet during the last glacial maximum |
publisher |
International Glaciological Society |
url |
http://hdl.handle.net/2115/34574 https://doi.org/10.3189/172756403781815500 |
long_lat |
ENVELOPE(89.987,89.987,68.219,68.219) |
geographic |
Greenland Kara Sea Taymyr |
geographic_facet |
Greenland Kara Sea Taymyr |
genre |
Annals of Glaciology Fennoscandia Fennoscandian Greenland GRIP Ice Sheet Kara Sea Taymyr Taymyr Peninsula |
genre_facet |
Annals of Glaciology Fennoscandia Fennoscandian Greenland GRIP Ice Sheet Kara Sea Taymyr Taymyr Peninsula |
op_relation |
http://www.igsoc.org/ http://hdl.handle.net/2115/34574 Annals of Glaciology, 37(1): 383-389 http://dx.doi.org/10.3189/172756403781815500 |
op_rights |
© 2003 International Glaciological Society |
op_doi |
https://doi.org/10.3189/172756403781815500 |
container_title |
Annals of Glaciology |
container_volume |
37 |
container_start_page |
383 |
op_container_end_page |
389 |
_version_ |
1765999244364218368 |