Last Glacial loess in Europe: luminescence database and chronology of deposition
During the Last Glacial Period, the climate shift to cold conditions associated with changes in atmospheric circulation and vegetation cover resulted in the development of large aeolian systems in Europe. On a regional scale, many factors may have influenced dust dynamics, such as the latitudinal di...
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2023
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ftunivlausanne:oai:serval.unil.ch:BIB_4593A59F6359 2024-02-11T10:03:47+01:00 Last Glacial loess in Europe: luminescence database and chronology of deposition Bosq, Mathieu Kreutzer, Sebastian Bertran, Pascal Lanos, Philippe Dufresne, Philippe Schmidt, Christoph 2023-10-20 application/pdf https://serval.unil.ch/notice/serval:BIB_4593A59F6359 https://doi.org/10.5194/essd-15-4689-2023 https://serval.unil.ch/resource/serval:BIB_4593A59F6359.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_4593A59F63597 eng eng info:eu-repo/semantics/altIdentifier/doi/10.5194/essd-15-4689-2023 info:eu-repo/semantics/altIdentifier/pissn/1866-3516 info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_4593A59F63597 https://serval.unil.ch/notice/serval:BIB_4593A59F6359 doi:10.5194/essd-15-4689-2023 https://serval.unil.ch/resource/serval:BIB_4593A59F6359.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_4593A59F63597 info:eu-repo/semantics/openAccess CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ Earth System Science Data, vol. 15, no. 10, pp. 4689-4711 General Earth and Planetary Sciences info:eu-repo/semantics/article article info:eu-repo/semantics/publishedVersion 2023 ftunivlausanne https://doi.org/10.5194/essd-15-4689-2023 2024-01-22T01:11:24Z During the Last Glacial Period, the climate shift to cold conditions associated with changes in atmospheric circulation and vegetation cover resulted in the development of large aeolian systems in Europe. On a regional scale, many factors may have influenced dust dynamics, such as the latitudinal difference between the various aeolian systems and the variability of the sources of wind-transported particles. Therefore, the assumption that the timing of aeolian deposition is strictly synchronous in Europe does not seem to be the most plausible hypothesis and needs to be evaluated. To test this assumption, the chronology of loess deposition in different European regions was investigated by studying 93 luminescence-dated loess–palaeosol sequences with their data recalculated and compiled in a single comma separated values (*.csv) file: the ChronoLoess database. Our study shows that the two major aeolian systems, the Northern European Loess Belt (NELB) on the one hand and the systems associated with the rivers draining the Alpine Ice Sheet on the other hand, developed asynchronously. The significant deposition started at about 32 kyr b2k for the NELB vs. 42 kyr b2k for the perialpine loess and peaked about 2 millennia later for the former (21.8 vs. 23.9 kyr b2k, respectively). This shift resulted mainly from the time lag between the maxima of the Alpine and Fennoscandian ice sheets, which acted as the primary sources of fine-grained particles through glacial abrasion. The major geomorphic changes that resulted from the development and decay of the Fennoscandian and British–Irish ice sheets also played an important role. Particularly, ice sheet coalescence during the Last Glacial Maximum (LGM) diverted meltwater fluxes through the Channel River and provided vast amounts of glacial particles available for deflation in the western NELB. The period during which the maximum mass accumulation rate was reached for each loess–palaeosol sequence is relatively homogeneous in the NELB and ranges from 30 to 19 kyr b2k, whereas ... Article in Journal/Newspaper Fennoscandian Ice Sheet Université de Lausanne (UNIL): Serval - Serveur académique lausannois Earth System Science Data 15 10 4689 4711 |
institution |
Open Polar |
collection |
Université de Lausanne (UNIL): Serval - Serveur académique lausannois |
op_collection_id |
ftunivlausanne |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Bosq, Mathieu Kreutzer, Sebastian Bertran, Pascal Lanos, Philippe Dufresne, Philippe Schmidt, Christoph Last Glacial loess in Europe: luminescence database and chronology of deposition |
topic_facet |
General Earth and Planetary Sciences |
description |
During the Last Glacial Period, the climate shift to cold conditions associated with changes in atmospheric circulation and vegetation cover resulted in the development of large aeolian systems in Europe. On a regional scale, many factors may have influenced dust dynamics, such as the latitudinal difference between the various aeolian systems and the variability of the sources of wind-transported particles. Therefore, the assumption that the timing of aeolian deposition is strictly synchronous in Europe does not seem to be the most plausible hypothesis and needs to be evaluated. To test this assumption, the chronology of loess deposition in different European regions was investigated by studying 93 luminescence-dated loess–palaeosol sequences with their data recalculated and compiled in a single comma separated values (*.csv) file: the ChronoLoess database. Our study shows that the two major aeolian systems, the Northern European Loess Belt (NELB) on the one hand and the systems associated with the rivers draining the Alpine Ice Sheet on the other hand, developed asynchronously. The significant deposition started at about 32 kyr b2k for the NELB vs. 42 kyr b2k for the perialpine loess and peaked about 2 millennia later for the former (21.8 vs. 23.9 kyr b2k, respectively). This shift resulted mainly from the time lag between the maxima of the Alpine and Fennoscandian ice sheets, which acted as the primary sources of fine-grained particles through glacial abrasion. The major geomorphic changes that resulted from the development and decay of the Fennoscandian and British–Irish ice sheets also played an important role. Particularly, ice sheet coalescence during the Last Glacial Maximum (LGM) diverted meltwater fluxes through the Channel River and provided vast amounts of glacial particles available for deflation in the western NELB. The period during which the maximum mass accumulation rate was reached for each loess–palaeosol sequence is relatively homogeneous in the NELB and ranges from 30 to 19 kyr b2k, whereas ... |
format |
Article in Journal/Newspaper |
author |
Bosq, Mathieu Kreutzer, Sebastian Bertran, Pascal Lanos, Philippe Dufresne, Philippe Schmidt, Christoph |
author_facet |
Bosq, Mathieu Kreutzer, Sebastian Bertran, Pascal Lanos, Philippe Dufresne, Philippe Schmidt, Christoph |
author_sort |
Bosq, Mathieu |
title |
Last Glacial loess in Europe: luminescence database and chronology of deposition |
title_short |
Last Glacial loess in Europe: luminescence database and chronology of deposition |
title_full |
Last Glacial loess in Europe: luminescence database and chronology of deposition |
title_fullStr |
Last Glacial loess in Europe: luminescence database and chronology of deposition |
title_full_unstemmed |
Last Glacial loess in Europe: luminescence database and chronology of deposition |
title_sort |
last glacial loess in europe: luminescence database and chronology of deposition |
publishDate |
2023 |
url |
https://serval.unil.ch/notice/serval:BIB_4593A59F6359 https://doi.org/10.5194/essd-15-4689-2023 https://serval.unil.ch/resource/serval:BIB_4593A59F6359.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_4593A59F63597 |
genre |
Fennoscandian Ice Sheet |
genre_facet |
Fennoscandian Ice Sheet |
op_source |
Earth System Science Data, vol. 15, no. 10, pp. 4689-4711 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/essd-15-4689-2023 info:eu-repo/semantics/altIdentifier/pissn/1866-3516 info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_4593A59F63597 https://serval.unil.ch/notice/serval:BIB_4593A59F6359 doi:10.5194/essd-15-4689-2023 https://serval.unil.ch/resource/serval:BIB_4593A59F6359.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_4593A59F63597 |
op_rights |
info:eu-repo/semantics/openAccess CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5194/essd-15-4689-2023 |
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Earth System Science Data |
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15 |
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