Linkage between dust cycle and loess of the Last Glacial Maximum in Europe
<p>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...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2020-04-01
|
| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/20/4969/2020/acp-20-4969-2020.pdf |
| _version_ | 1818720526578745344 |
|---|---|
| author | E. J. Schaffernicht P. Ludwig Y. Shao |
| author_facet | E. J. Schaffernicht P. Ludwig Y. Shao |
| author_sort | E. J. Schaffernicht |
| collection | DOAJ |
| description | <p>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.</p> |
| first_indexed | 2024-12-17T20:24:14Z |
| format | Article |
| id | doaj.art-b6bb432c98e946da8b845a15be97466a |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-17T20:24:14Z |
| publishDate | 2020-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-b6bb432c98e946da8b845a15be97466a2022-12-21T21:33:51ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242020-04-01204969498610.5194/acp-20-4969-2020Linkage between dust cycle and loess of the Last Glacial Maximum in EuropeE. J. Schaffernicht0P. Ludwig1Y. Shao2Institute for Geophysics and Meteorology, University of Cologne, 50969 Cologne, GermanyInstitute for Meteorology and Climate Research, Karlsruhe Institute of Technology, 76131 Karlsruhe, GermanyInstitute for Geophysics and Meteorology, University of Cologne, 50969 Cologne, Germany<p>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.</p>https://www.atmos-chem-phys.net/20/4969/2020/acp-20-4969-2020.pdf |
| spellingShingle | E. J. Schaffernicht P. Ludwig Y. Shao Linkage between dust cycle and loess of the Last Glacial Maximum in Europe Atmospheric Chemistry and Physics |
| title | 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_short | 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 |
| url | https://www.atmos-chem-phys.net/20/4969/2020/acp-20-4969-2020.pdf |
| work_keys_str_mv | AT ejschaffernicht linkagebetweendustcycleandloessofthelastglacialmaximumineurope AT pludwig linkagebetweendustcycleandloessofthelastglacialmaximumineurope AT yshao linkagebetweendustcycleandloessofthelastglacialmaximumineurope |