Linkage between dust cycle and loess of the Last Glacial Maximum in Europe
This article establishes a linkage between the mineral dust cycle and loess deposits during the Last Glacial Maximum (LGM) in Europe. To this aim, we simulate the LGM dust cycle at high resolution using a regional climate–dust model. The model-simulated dust deposition rates are found to be comparab...
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ftcopernicus:oai:publications.copernicus.org:acp79046 2023-05-15T16:41:12+02:00 Linkage between dust cycle and loess of the Last Glacial Maximum in Europe Schaffernicht, Erik Jan Ludwig, Patrick Shao, Yaping 2020-04-27 application/pdf https://doi.org/10.5194/acp-20-4969-2020 https://www.atmos-chem-phys.net/20/4969/2020/ eng eng doi:10.5194/acp-20-4969-2020 https://www.atmos-chem-phys.net/20/4969/2020/ eISSN: 1680-7324 Text 2020 ftcopernicus https://doi.org/10.5194/acp-20-4969-2020 2020-05-04T14:42:00Z This article establishes a linkage between the mineral dust cycle and loess deposits during the Last Glacial Maximum (LGM) in Europe. To this aim, we simulate the LGM dust cycle at high resolution using a regional climate–dust model. The model-simulated dust deposition rates are found to be comparable with the mass accumulation rates of the loess deposits determined from more than 70 sites. In contrast to the present-day prevailing westerlies, winds from northeast, east, and southeast (36 %) and cyclonic regimes (22 %) were found to prevail over central Europe during the LGM. This supports the hypothesis that the recurring east sector winds associated with a high-pressure system over the Eurasian ice sheet (EIS) dominated the dust transport from the EIS margins in eastern and central Europe. The highest dust emission rates in Europe occurred in summer and autumn. Almost all dust was emitted from the zone between the Alps, the Black Sea, and the southern EIS margin. Within this zone, the highest emission rates were located near the southernmost EIS margins corresponding to the present-day German–Polish border region. Coherent with the persistent easterlies, westward-running dust plumes resulted in high deposition rates in western Poland, northern Czechia, the Netherlands, the southern North Sea region, and on the North German Plain including adjacent regions in central Germany. The agreement between the climate model simulations and the mass accumulation rates of the loess deposits corroborates the proposed LGM dust cycle hypothesis for Europe. Text Ice Sheet Copernicus Publications: E-Journals Atmospheric Chemistry and Physics 20 8 4969 4986 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
This article establishes a linkage between the mineral dust cycle and loess deposits during the Last Glacial Maximum (LGM) in Europe. To this aim, we simulate the LGM dust cycle at high resolution using a regional climate–dust model. The model-simulated dust deposition rates are found to be comparable with the mass accumulation rates of the loess deposits determined from more than 70 sites. In contrast to the present-day prevailing westerlies, winds from northeast, east, and southeast (36 %) and cyclonic regimes (22 %) were found to prevail over central Europe during the LGM. This supports the hypothesis that the recurring east sector winds associated with a high-pressure system over the Eurasian ice sheet (EIS) dominated the dust transport from the EIS margins in eastern and central Europe. The highest dust emission rates in Europe occurred in summer and autumn. Almost all dust was emitted from the zone between the Alps, the Black Sea, and the southern EIS margin. Within this zone, the highest emission rates were located near the southernmost EIS margins corresponding to the present-day German–Polish border region. Coherent with the persistent easterlies, westward-running dust plumes resulted in high deposition rates in western Poland, northern Czechia, the Netherlands, the southern North Sea region, and on the North German Plain including adjacent regions in central Germany. The agreement between the climate model simulations and the mass accumulation rates of the loess deposits corroborates the proposed LGM dust cycle hypothesis for Europe. |
format |
Text |
author |
Schaffernicht, Erik Jan Ludwig, Patrick Shao, Yaping |
spellingShingle |
Schaffernicht, Erik Jan Ludwig, Patrick Shao, Yaping Linkage between dust cycle and loess of the Last Glacial Maximum in Europe |
author_facet |
Schaffernicht, Erik Jan Ludwig, Patrick Shao, Yaping |
author_sort |
Schaffernicht, Erik Jan |
title |
Linkage between dust cycle and loess of the Last Glacial Maximum in Europe |
title_short |
Linkage between dust cycle and loess of the Last Glacial Maximum in Europe |
title_full |
Linkage between dust cycle and loess of the Last Glacial Maximum in Europe |
title_fullStr |
Linkage between dust cycle and loess of the Last Glacial Maximum in Europe |
title_full_unstemmed |
Linkage between dust cycle and loess of the Last Glacial Maximum in Europe |
title_sort |
linkage between dust cycle and loess of the last glacial maximum in europe |
publishDate |
2020 |
url |
https://doi.org/10.5194/acp-20-4969-2020 https://www.atmos-chem-phys.net/20/4969/2020/ |
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Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-20-4969-2020 https://www.atmos-chem-phys.net/20/4969/2020/ |
op_doi |
https://doi.org/10.5194/acp-20-4969-2020 |
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Atmospheric Chemistry and Physics |
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20 |
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8 |
container_start_page |
4969 |
op_container_end_page |
4986 |
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