How dusty was the last glacial maximum over Europe?
Our study focuses on European loess sequences, particularly the eolian intervals in between the observed pedogenic units. The classical concept of soil formation from parent material is reformulated to estimate of the duration and the associated sedimentation rate (SR) and mass accumulation rate (MA...
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Columbia University
2021
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ftdatacite:10.7916/d8-zkpr-fb37 2023-05-15T16:30:14+02:00 How dusty was the last glacial maximum over Europe? Rousseau, Denis-Didier Antoine, Pierre Sun, Youbin 2021 https://dx.doi.org/10.7916/d8-zkpr-fb37 https://academiccommons.columbia.edu/doi/10.7916/d8-zkpr-fb37 unknown Columbia University https://dx.doi.org/10.1016/j.quascirev.2020.106775 Loess Dust Sedimentation and deposition Last Glacial Maximum Paleoclimatology Text Articles article-journal ScholarlyArticle 2021 ftdatacite https://doi.org/10.7916/d8-zkpr-fb37 https://doi.org/10.1016/j.quascirev.2020.106775 2021-11-05T12:55:41Z Our study focuses on European loess sequences, particularly the eolian intervals in between the observed pedogenic units. The classical concept of soil formation from parent material is reformulated to estimate of the duration and the associated sedimentation rate (SR) and mass accumulation rate (MAR) of these paleodust intervals. We show that the Greenland Stadial (GS) duration in European loess deposits includes the thickness of the overlying pedogenic unit, which in fact developed downward into the upper part of the eolian unit. The lower stratigraphical limit of the eolian unit overlying the pedogenic unit corresponds to the restart of the dust sedimentation of the younger GS. We illustrate this interpretation first by computing both SRs and MARs first for the Nussloch key sequence, the most complete European series. The correlation between Nussloch and other European loess sequences, located along a 1800 km longitudinal transect, allows computation of SR and MAR for several identified GS events. Comparing GS from marine and ice core records, our study shows that the two last Bond cycles are preserved in every European eolian record. Bulk SR and MAR are estimated and compared for these two Bond cycles, showing the highest SRs and MARs in western Europe. These indices also indicate that the last stadials, embedding an Henrich event, were not the dustiest in every Bond cycle. Our estimated MAR also differ from previously published computations, which did not take into account the various pedogenic units present in the studied loess sequences. The bulk SR and MAR estimates computed for the two last Bond Cycles from Chinese sequences from the Loess Plateau indicate lower atmospheric dust than in Europe during the Last Glacial Maximum. SR and MAR estimates computed from the fine-grained material for European records fit with Earth System model reconstructions. Text Greenland ice core DataCite Metadata Store (German National Library of Science and Technology) Greenland |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Loess Dust Sedimentation and deposition Last Glacial Maximum Paleoclimatology |
spellingShingle |
Loess Dust Sedimentation and deposition Last Glacial Maximum Paleoclimatology Rousseau, Denis-Didier Antoine, Pierre Sun, Youbin How dusty was the last glacial maximum over Europe? |
topic_facet |
Loess Dust Sedimentation and deposition Last Glacial Maximum Paleoclimatology |
description |
Our study focuses on European loess sequences, particularly the eolian intervals in between the observed pedogenic units. The classical concept of soil formation from parent material is reformulated to estimate of the duration and the associated sedimentation rate (SR) and mass accumulation rate (MAR) of these paleodust intervals. We show that the Greenland Stadial (GS) duration in European loess deposits includes the thickness of the overlying pedogenic unit, which in fact developed downward into the upper part of the eolian unit. The lower stratigraphical limit of the eolian unit overlying the pedogenic unit corresponds to the restart of the dust sedimentation of the younger GS. We illustrate this interpretation first by computing both SRs and MARs first for the Nussloch key sequence, the most complete European series. The correlation between Nussloch and other European loess sequences, located along a 1800 km longitudinal transect, allows computation of SR and MAR for several identified GS events. Comparing GS from marine and ice core records, our study shows that the two last Bond cycles are preserved in every European eolian record. Bulk SR and MAR are estimated and compared for these two Bond cycles, showing the highest SRs and MARs in western Europe. These indices also indicate that the last stadials, embedding an Henrich event, were not the dustiest in every Bond cycle. Our estimated MAR also differ from previously published computations, which did not take into account the various pedogenic units present in the studied loess sequences. The bulk SR and MAR estimates computed for the two last Bond Cycles from Chinese sequences from the Loess Plateau indicate lower atmospheric dust than in Europe during the Last Glacial Maximum. SR and MAR estimates computed from the fine-grained material for European records fit with Earth System model reconstructions. |
format |
Text |
author |
Rousseau, Denis-Didier Antoine, Pierre Sun, Youbin |
author_facet |
Rousseau, Denis-Didier Antoine, Pierre Sun, Youbin |
author_sort |
Rousseau, Denis-Didier |
title |
How dusty was the last glacial maximum over Europe? |
title_short |
How dusty was the last glacial maximum over Europe? |
title_full |
How dusty was the last glacial maximum over Europe? |
title_fullStr |
How dusty was the last glacial maximum over Europe? |
title_full_unstemmed |
How dusty was the last glacial maximum over Europe? |
title_sort |
how dusty was the last glacial maximum over europe? |
publisher |
Columbia University |
publishDate |
2021 |
url |
https://dx.doi.org/10.7916/d8-zkpr-fb37 https://academiccommons.columbia.edu/doi/10.7916/d8-zkpr-fb37 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core |
genre_facet |
Greenland ice core |
op_relation |
https://dx.doi.org/10.1016/j.quascirev.2020.106775 |
op_doi |
https://doi.org/10.7916/d8-zkpr-fb37 https://doi.org/10.1016/j.quascirev.2020.106775 |
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1766019951606366208 |