Optically‐Stimulated‐Luminescence Ages and Paleo‐Environmental Implications of Relict Frost Wedges in North–Central Bohemia, Czech Republic
ABSTRACT Relict frost wedges are widespread and valuable indicators of past environmental conditions that have been extensively dated across central and western European lowlands over the past few decades, but their timing in the Czech Republic is poorly known. Here, we present optically‐stimulated‐...
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crwiley:10.1002/ppp.2241 2024-10-06T13:48:35+00:00 Optically‐Stimulated‐Luminescence Ages and Paleo‐Environmental Implications of Relict Frost Wedges in North–Central Bohemia, Czech Republic Uxa, Tomáš Křížek, Marek Krause, David Moska, Piotr Murton, Julian Grantová Agentura České Republiky Ministerstvo Školství, Mládeže a Tělovýchovy 2024 http://dx.doi.org/10.1002/ppp.2241 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2241 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Permafrost and Periglacial Processes volume 35, issue 3, page 294-383 ISSN 1045-6740 1099-1530 journal-article 2024 crwiley https://doi.org/10.1002/ppp.2241 2024-09-11T04:15:56Z ABSTRACT Relict frost wedges are widespread and valuable indicators of past environmental conditions that have been extensively dated across central and western European lowlands over the past few decades, but their timing in the Czech Republic is poorly known. Here, we present optically‐stimulated‐luminescence (OSL) ages for seven relict frost wedges situated at four study sites in north–central Bohemia, Czech Republic (49.9992–50.4956°N, 13.3736–16.0011°E, 230–350 m above sea level). The OSL ages indicate that the frost wedges developed during two phases in marine isotope stage 2: an older phase that peaked at 23.6 ± 2.9 ka and a younger phase that peaked at 16.1 ± 1.3 ka. Both phases probably experienced cold, dry and windy conditions that were mostly associated with <0°C mean annual air and ground temperatures and the presence of at least discontinuous permafrost, which is in line with similar central and western European records and other paleo‐environmental archives. The new OSL ages constitute the first extended dataset on the timing of frost wedges in this undersampled area between the Fennoscandian and Alpine ice sheets, which is essential for reconstructing past permafrost extents and climate conditions, as well as for validating models of past permafrost dynamics in central Europe. Article in Journal/Newspaper Fennoscandian Ice permafrost Permafrost and Periglacial Processes wedge* Wiley Online Library Permafrost and Periglacial Processes |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT Relict frost wedges are widespread and valuable indicators of past environmental conditions that have been extensively dated across central and western European lowlands over the past few decades, but their timing in the Czech Republic is poorly known. Here, we present optically‐stimulated‐luminescence (OSL) ages for seven relict frost wedges situated at four study sites in north–central Bohemia, Czech Republic (49.9992–50.4956°N, 13.3736–16.0011°E, 230–350 m above sea level). The OSL ages indicate that the frost wedges developed during two phases in marine isotope stage 2: an older phase that peaked at 23.6 ± 2.9 ka and a younger phase that peaked at 16.1 ± 1.3 ka. Both phases probably experienced cold, dry and windy conditions that were mostly associated with <0°C mean annual air and ground temperatures and the presence of at least discontinuous permafrost, which is in line with similar central and western European records and other paleo‐environmental archives. The new OSL ages constitute the first extended dataset on the timing of frost wedges in this undersampled area between the Fennoscandian and Alpine ice sheets, which is essential for reconstructing past permafrost extents and climate conditions, as well as for validating models of past permafrost dynamics in central Europe. |
author2 |
Grantová Agentura České Republiky Ministerstvo Školství, Mládeže a Tělovýchovy |
format |
Article in Journal/Newspaper |
author |
Uxa, Tomáš Křížek, Marek Krause, David Moska, Piotr Murton, Julian |
spellingShingle |
Uxa, Tomáš Křížek, Marek Krause, David Moska, Piotr Murton, Julian Optically‐Stimulated‐Luminescence Ages and Paleo‐Environmental Implications of Relict Frost Wedges in North–Central Bohemia, Czech Republic |
author_facet |
Uxa, Tomáš Křížek, Marek Krause, David Moska, Piotr Murton, Julian |
author_sort |
Uxa, Tomáš |
title |
Optically‐Stimulated‐Luminescence Ages and Paleo‐Environmental Implications of Relict Frost Wedges in North–Central Bohemia, Czech Republic |
title_short |
Optically‐Stimulated‐Luminescence Ages and Paleo‐Environmental Implications of Relict Frost Wedges in North–Central Bohemia, Czech Republic |
title_full |
Optically‐Stimulated‐Luminescence Ages and Paleo‐Environmental Implications of Relict Frost Wedges in North–Central Bohemia, Czech Republic |
title_fullStr |
Optically‐Stimulated‐Luminescence Ages and Paleo‐Environmental Implications of Relict Frost Wedges in North–Central Bohemia, Czech Republic |
title_full_unstemmed |
Optically‐Stimulated‐Luminescence Ages and Paleo‐Environmental Implications of Relict Frost Wedges in North–Central Bohemia, Czech Republic |
title_sort |
optically‐stimulated‐luminescence ages and paleo‐environmental implications of relict frost wedges in north–central bohemia, czech republic |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/ppp.2241 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2241 |
genre |
Fennoscandian Ice permafrost Permafrost and Periglacial Processes wedge* |
genre_facet |
Fennoscandian Ice permafrost Permafrost and Periglacial Processes wedge* |
op_source |
Permafrost and Periglacial Processes volume 35, issue 3, page 294-383 ISSN 1045-6740 1099-1530 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ppp.2241 |
container_title |
Permafrost and Periglacial Processes |
_version_ |
1812176688290725888 |