Millennial-scale fluctuations of palaeo-ice margin at the southern fringe of the last Fennoscandian Ice Sheet
International audience Abstract. The paper presents the first terrestrial record of millennial-scale palaeo-ice margin oscillations at the southern fringe of the last Fennoscandian Ice Sheet (FIS) during the last glacial cycle. The study area is located in northern Poland close to the last FIS maxim...
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Online Access: | https://hal.inrae.fr/hal-04664038 https://doi.org/10.5194/tc-18-1889-2024 |
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ftcollegfrance:oai:HAL:hal-04664038v1 2024-09-15T18:06:05+00:00 Millennial-scale fluctuations of palaeo-ice margin at the southern fringe of the last Fennoscandian Ice Sheet Tylmann, Karol Wysota, Wojciech Rinterknecht, V.R. Moska, Piotr Bielicka-Giełdoń, Aleksandra University of Gdańsk (UG) Nicolaus Copernicus University Toruń Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Silesian Technical University 2024-04-23 https://hal.inrae.fr/hal-04664038 https://doi.org/10.5194/tc-18-1889-2024 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-18-1889-2024 hal-04664038 https://hal.inrae.fr/hal-04664038 doi:10.5194/tc-18-1889-2024 WOS: 001206127200001 ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.inrae.fr/hal-04664038 The Cryosphere, 2024, 18 (4), pp.1889-1909. ⟨10.5194/tc-18-1889-2024⟩ [SHS.GEO]Humanities and Social Sciences/Geography info:eu-repo/semantics/article Journal articles 2024 ftcollegfrance https://doi.org/10.5194/tc-18-1889-2024 2024-08-01T23:31:27Z International audience Abstract. The paper presents the first terrestrial record of millennial-scale palaeo-ice margin oscillations at the southern fringe of the last Fennoscandian Ice Sheet (FIS) during the last glacial cycle. The study area is located in northern Poland close to the last FIS maximum limit. The chronology and dynamics of palaeo-ice margin oscillations at the southern fringe of the FIS are based on combined luminescence and 10Be surface exposure dating. Optically stimulated luminescence (OSL) was used to date sandy deposits (fluvioglacial sediments and aeolian deposits filling fossil periglacial wedges) intercalating basal till layers. The most likely age of the tills was constrained by Bayesian modelling of the sequence of OSL ages and lithostratigraphy. 10Be surface exposure dating was used on erratic boulders left during the final retreat of the last FIS and resting on the surface of glacial landforms. Our results, which are mainly based on OSL chronology and Bayesian modelling, indicate millennial-scale oscillations of the last FIS in northern Poland between ∼19 and ∼17 ka. The last FIS retreated and re-advanced over a relatively short period of time (2–3 ka), leaving lithostratigraphic records (basal tills) of three ice re-advances over a millennial-scale cycle: 19.2±1.1, 17.8±0.5 and 16.9±0.5 ka. Despite 10Be surface exposure ages obtained for 14 erratic boulders being poorly clustered, the main mode of age distribution occurs at ∼18 ka and indicates a possible signal of the ice sheet retreat after one of the re-advances. We explore the dynamics of these oscillations and compare the proposed cycles of the southern FIS advances and retreats with existing patterns of the last deglaciation and millennial-scale fluctuations of the last FIS inferred from marine records. Article in Journal/Newspaper Fennoscandian Ice Sheet The Cryosphere Collège de France: HAL The Cryosphere 18 4 1889 1909 |
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Open Polar |
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Collège de France: HAL |
op_collection_id |
ftcollegfrance |
language |
English |
topic |
[SHS.GEO]Humanities and Social Sciences/Geography |
spellingShingle |
[SHS.GEO]Humanities and Social Sciences/Geography Tylmann, Karol Wysota, Wojciech Rinterknecht, V.R. Moska, Piotr Bielicka-Giełdoń, Aleksandra Millennial-scale fluctuations of palaeo-ice margin at the southern fringe of the last Fennoscandian Ice Sheet |
topic_facet |
[SHS.GEO]Humanities and Social Sciences/Geography |
description |
International audience Abstract. The paper presents the first terrestrial record of millennial-scale palaeo-ice margin oscillations at the southern fringe of the last Fennoscandian Ice Sheet (FIS) during the last glacial cycle. The study area is located in northern Poland close to the last FIS maximum limit. The chronology and dynamics of palaeo-ice margin oscillations at the southern fringe of the FIS are based on combined luminescence and 10Be surface exposure dating. Optically stimulated luminescence (OSL) was used to date sandy deposits (fluvioglacial sediments and aeolian deposits filling fossil periglacial wedges) intercalating basal till layers. The most likely age of the tills was constrained by Bayesian modelling of the sequence of OSL ages and lithostratigraphy. 10Be surface exposure dating was used on erratic boulders left during the final retreat of the last FIS and resting on the surface of glacial landforms. Our results, which are mainly based on OSL chronology and Bayesian modelling, indicate millennial-scale oscillations of the last FIS in northern Poland between ∼19 and ∼17 ka. The last FIS retreated and re-advanced over a relatively short period of time (2–3 ka), leaving lithostratigraphic records (basal tills) of three ice re-advances over a millennial-scale cycle: 19.2±1.1, 17.8±0.5 and 16.9±0.5 ka. Despite 10Be surface exposure ages obtained for 14 erratic boulders being poorly clustered, the main mode of age distribution occurs at ∼18 ka and indicates a possible signal of the ice sheet retreat after one of the re-advances. We explore the dynamics of these oscillations and compare the proposed cycles of the southern FIS advances and retreats with existing patterns of the last deglaciation and millennial-scale fluctuations of the last FIS inferred from marine records. |
author2 |
University of Gdańsk (UG) Nicolaus Copernicus University Toruń Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Silesian Technical University |
format |
Article in Journal/Newspaper |
author |
Tylmann, Karol Wysota, Wojciech Rinterknecht, V.R. Moska, Piotr Bielicka-Giełdoń, Aleksandra |
author_facet |
Tylmann, Karol Wysota, Wojciech Rinterknecht, V.R. Moska, Piotr Bielicka-Giełdoń, Aleksandra |
author_sort |
Tylmann, Karol |
title |
Millennial-scale fluctuations of palaeo-ice margin at the southern fringe of the last Fennoscandian Ice Sheet |
title_short |
Millennial-scale fluctuations of palaeo-ice margin at the southern fringe of the last Fennoscandian Ice Sheet |
title_full |
Millennial-scale fluctuations of palaeo-ice margin at the southern fringe of the last Fennoscandian Ice Sheet |
title_fullStr |
Millennial-scale fluctuations of palaeo-ice margin at the southern fringe of the last Fennoscandian Ice Sheet |
title_full_unstemmed |
Millennial-scale fluctuations of palaeo-ice margin at the southern fringe of the last Fennoscandian Ice Sheet |
title_sort |
millennial-scale fluctuations of palaeo-ice margin at the southern fringe of the last fennoscandian ice sheet |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.inrae.fr/hal-04664038 https://doi.org/10.5194/tc-18-1889-2024 |
genre |
Fennoscandian Ice Sheet The Cryosphere |
genre_facet |
Fennoscandian Ice Sheet The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.inrae.fr/hal-04664038 The Cryosphere, 2024, 18 (4), pp.1889-1909. ⟨10.5194/tc-18-1889-2024⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-18-1889-2024 hal-04664038 https://hal.inrae.fr/hal-04664038 doi:10.5194/tc-18-1889-2024 WOS: 001206127200001 |
op_doi |
https://doi.org/10.5194/tc-18-1889-2024 |
container_title |
The Cryosphere |
container_volume |
18 |
container_issue |
4 |
container_start_page |
1889 |
op_container_end_page |
1909 |
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1810443583260459008 |