Younger Dryas and Early Holocene ice‐margin dynamics in northwest Russia
The dynamics of the last Fennoscandian Ice Sheet (FIS) are relatively well constrained in the Nordic countries. Ice‐sheet dynamics in NW Russia, however, are comparatively less well understood owing to the scale and resolution of existing studies. New large‐scale glacial geomorphological datasets fr...
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crwiley:10.1111/bor.12653 2024-06-02T08:06:32+00:00 Younger Dryas and Early Holocene ice‐margin dynamics in northwest Russia Boyes, Benjamin M. Pearce, Danni M. Linch, Lorna D. Nash, David J. 2024 http://dx.doi.org/10.1111/bor.12653 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12653 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ Boreas ISSN 0300-9483 1502-3885 journal-article 2024 crwiley https://doi.org/10.1111/bor.12653 2024-05-03T10:58:24Z The dynamics of the last Fennoscandian Ice Sheet (FIS) are relatively well constrained in the Nordic countries. Ice‐sheet dynamics in NW Russia, however, are comparatively less well understood owing to the scale and resolution of existing studies. New large‐scale glacial geomorphological datasets from NW Russia based on high‐resolution remotely sensed imagery allow for an independent reassessment of the extent and dynamics of the FIS during the Younger Dryas and Early Holocene ( c. 12.9–10 ka) in NW Russia. The reconstruction provides a more detailed link between geomorphological expressions of palaeoglaciation than previous proposals. Rather than a continuous Younger Dryas ice marginal zone (IMZ) stretching from Finland to northern Norway, the geomorphological signature of NW Russia reveals 14 IMZs that document discrete stationary ice‐margin positions (possibly standstill and/or readvance events) during the overall retreat. The relative age sequence of the IMZs, supported by an updated numerical age database, suggests that they formed time‐transgressively during the Younger Dryas and Early Holocene rather than contemporaneously. Moreover, specific landform assemblages reveal contrasting glacial landsystems in NW Russia: (i) a northern subpolar glacial landsystem; and (ii) a southern temperate glacial landsystem. The model presented herein provides robust empirical constraints for testing and validating numerical ice‐sheet models and understanding ice‐sheet responses to rapid climate change. Article in Journal/Newspaper Fennoscandian Ice Sheet Northern Norway Northwest Russia Wiley Online Library Norway Boreas |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
The dynamics of the last Fennoscandian Ice Sheet (FIS) are relatively well constrained in the Nordic countries. Ice‐sheet dynamics in NW Russia, however, are comparatively less well understood owing to the scale and resolution of existing studies. New large‐scale glacial geomorphological datasets from NW Russia based on high‐resolution remotely sensed imagery allow for an independent reassessment of the extent and dynamics of the FIS during the Younger Dryas and Early Holocene ( c. 12.9–10 ka) in NW Russia. The reconstruction provides a more detailed link between geomorphological expressions of palaeoglaciation than previous proposals. Rather than a continuous Younger Dryas ice marginal zone (IMZ) stretching from Finland to northern Norway, the geomorphological signature of NW Russia reveals 14 IMZs that document discrete stationary ice‐margin positions (possibly standstill and/or readvance events) during the overall retreat. The relative age sequence of the IMZs, supported by an updated numerical age database, suggests that they formed time‐transgressively during the Younger Dryas and Early Holocene rather than contemporaneously. Moreover, specific landform assemblages reveal contrasting glacial landsystems in NW Russia: (i) a northern subpolar glacial landsystem; and (ii) a southern temperate glacial landsystem. The model presented herein provides robust empirical constraints for testing and validating numerical ice‐sheet models and understanding ice‐sheet responses to rapid climate change. |
format |
Article in Journal/Newspaper |
author |
Boyes, Benjamin M. Pearce, Danni M. Linch, Lorna D. Nash, David J. |
spellingShingle |
Boyes, Benjamin M. Pearce, Danni M. Linch, Lorna D. Nash, David J. Younger Dryas and Early Holocene ice‐margin dynamics in northwest Russia |
author_facet |
Boyes, Benjamin M. Pearce, Danni M. Linch, Lorna D. Nash, David J. |
author_sort |
Boyes, Benjamin M. |
title |
Younger Dryas and Early Holocene ice‐margin dynamics in northwest Russia |
title_short |
Younger Dryas and Early Holocene ice‐margin dynamics in northwest Russia |
title_full |
Younger Dryas and Early Holocene ice‐margin dynamics in northwest Russia |
title_fullStr |
Younger Dryas and Early Holocene ice‐margin dynamics in northwest Russia |
title_full_unstemmed |
Younger Dryas and Early Holocene ice‐margin dynamics in northwest Russia |
title_sort |
younger dryas and early holocene ice‐margin dynamics in northwest russia |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1111/bor.12653 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12653 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Fennoscandian Ice Sheet Northern Norway Northwest Russia |
genre_facet |
Fennoscandian Ice Sheet Northern Norway Northwest Russia |
op_source |
Boreas ISSN 0300-9483 1502-3885 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1111/bor.12653 |
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Boreas |
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1800751488853606400 |