Last Glacial loess in Europe: luminescence database and chronology of deposition
Abstract. 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 lati...
Published in: | Earth System Science Data |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/essd-15-4689-2023 |
id |
ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/184502 |
---|---|
record_format |
openpolar |
spelling |
ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/184502 2024-05-19T07:40:12+00:00 Last Glacial loess in Europe: luminescence database and chronology of deposition BOSQ, Mathieu KREUTZER, Sebastian BERTRAN, Pascal LANOS, Philippe DUFRESNE, Philippe SCHMIDT, Christoph 2023 https://doi.org/10.5194/essd-15-4689-2023 en eng Copernicus Publications 1866-3508 doi:10.5194/essd-15-4689-2023 http://creativecommons.org/licenses/by/ Loess Database Geochronology Luminescence dating Europe Last Glacial Maximum LGM Quaternary Planète et Univers [physics]/Sciences de la Terre Planète et Univers [physics]/Sciences de la Terre/Géomorphologie Sciences de l'Homme et Société/Géographie Article de revue 2023 ftoskarbordeaux https://doi.org/10.5194/essd-15-4689-2023 2024-04-29T02:11:35Z Abstract. 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, ... Article in Journal/Newspaper Fennoscandian Ice Sheet OSKAR Bordeaux (Open Science Knowledge ARchive) Earth System Science Data 15 10 4689 4711 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Loess Database Geochronology Luminescence dating Europe Last Glacial Maximum LGM Quaternary Planète et Univers [physics]/Sciences de la Terre Planète et Univers [physics]/Sciences de la Terre/Géomorphologie Sciences de l'Homme et Société/Géographie |
spellingShingle |
Loess Database Geochronology Luminescence dating Europe Last Glacial Maximum LGM Quaternary Planète et Univers [physics]/Sciences de la Terre Planète et Univers [physics]/Sciences de la Terre/Géomorphologie Sciences de l'Homme et Société/Géographie 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 |
Loess Database Geochronology Luminescence dating Europe Last Glacial Maximum LGM Quaternary Planète et Univers [physics]/Sciences de la Terre Planète et Univers [physics]/Sciences de la Terre/Géomorphologie Sciences de l'Homme et Société/Géographie |
description |
Abstract. 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, ... |
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 |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/essd-15-4689-2023 |
genre |
Fennoscandian Ice Sheet |
genre_facet |
Fennoscandian Ice Sheet |
op_relation |
1866-3508 doi:10.5194/essd-15-4689-2023 |
op_rights |
http://creativecommons.org/licenses/by/ |
op_doi |
https://doi.org/10.5194/essd-15-4689-2023 |
container_title |
Earth System Science Data |
container_volume |
15 |
container_issue |
10 |
container_start_page |
4689 |
op_container_end_page |
4711 |
_version_ |
1799479776300236800 |