Evidence for an Extreme Cooling Event Prior to the Laschamp Geomagnetic Excursion in Eifel Maar Sediments
We present a timeseries of flood and slumping phases in central Europe for the past 65,000 years from event layers in sediment cores from infilled Eifel maar basins (Germany). Palynological, petrographic and organic carbon (chlorins) records are used to understand the precise timing of these events....
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ftmdpi:oai:mdpi.com:/2571-550X/6/1/14/ 2023-08-20T04:06:53+02:00 Evidence for an Extreme Cooling Event Prior to the Laschamp Geomagnetic Excursion in Eifel Maar Sediments Johannes Albert Frank Sirocko agris 2023-02-12 application/pdf https://doi.org/10.3390/quat6010014 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/quat6010014 https://creativecommons.org/licenses/by/4.0/ Quaternary; Volume 6; Issue 1; Pages: 14 Eifel maar sediments flood frequency slumping events permafrost Greenland Stadial 12 Laschamp geomagnetic event Heinrich stadials Text 2023 ftmdpi https://doi.org/10.3390/quat6010014 2023-08-01T08:46:26Z We present a timeseries of flood and slumping phases in central Europe for the past 65,000 years from event layers in sediment cores from infilled Eifel maar basins (Germany). Palynological, petrographic and organic carbon (chlorins) records are used to understand the precise timing of these events. Periods of increased flood activity seem to coincide with Heinrich stadials in marine sediment records, which are associated with cold and more arid climate conditions, indicating a vegetation response within the maars’ catchment areas. This multi-proxy correlation reveals prominent slumps at different maar sites during Greenland Stadial (GS) 12. The stratigraphy is based on sediment records from the Auel infilled maar and we thus call this event Auel Cold Event (ACE). Frozen and fractured sediment packages within the slump suggest deep frost or permafrost conditions for the region during the stadial. The results agree well with sediment archives and archeological sites across Europe that report severely cold and arid conditions for the stadial. This supports the assumption that GS12 was indeed one of the coldest periods of the last glacial cycle rather than the Heinrich stadials. Based on our age model, the ACE occurred at 43,500 yr b2k (years before the year 2000), which coincides with the initial weakening of Earth’s magnetic field strength prior to the Laschamp geomagnetic excursion. Text Greenland permafrost MDPI Open Access Publishing Greenland Quaternary 6 1 14 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Eifel maar sediments flood frequency slumping events permafrost Greenland Stadial 12 Laschamp geomagnetic event Heinrich stadials |
spellingShingle |
Eifel maar sediments flood frequency slumping events permafrost Greenland Stadial 12 Laschamp geomagnetic event Heinrich stadials Johannes Albert Frank Sirocko Evidence for an Extreme Cooling Event Prior to the Laschamp Geomagnetic Excursion in Eifel Maar Sediments |
topic_facet |
Eifel maar sediments flood frequency slumping events permafrost Greenland Stadial 12 Laschamp geomagnetic event Heinrich stadials |
description |
We present a timeseries of flood and slumping phases in central Europe for the past 65,000 years from event layers in sediment cores from infilled Eifel maar basins (Germany). Palynological, petrographic and organic carbon (chlorins) records are used to understand the precise timing of these events. Periods of increased flood activity seem to coincide with Heinrich stadials in marine sediment records, which are associated with cold and more arid climate conditions, indicating a vegetation response within the maars’ catchment areas. This multi-proxy correlation reveals prominent slumps at different maar sites during Greenland Stadial (GS) 12. The stratigraphy is based on sediment records from the Auel infilled maar and we thus call this event Auel Cold Event (ACE). Frozen and fractured sediment packages within the slump suggest deep frost or permafrost conditions for the region during the stadial. The results agree well with sediment archives and archeological sites across Europe that report severely cold and arid conditions for the stadial. This supports the assumption that GS12 was indeed one of the coldest periods of the last glacial cycle rather than the Heinrich stadials. Based on our age model, the ACE occurred at 43,500 yr b2k (years before the year 2000), which coincides with the initial weakening of Earth’s magnetic field strength prior to the Laschamp geomagnetic excursion. |
format |
Text |
author |
Johannes Albert Frank Sirocko |
author_facet |
Johannes Albert Frank Sirocko |
author_sort |
Johannes Albert |
title |
Evidence for an Extreme Cooling Event Prior to the Laschamp Geomagnetic Excursion in Eifel Maar Sediments |
title_short |
Evidence for an Extreme Cooling Event Prior to the Laschamp Geomagnetic Excursion in Eifel Maar Sediments |
title_full |
Evidence for an Extreme Cooling Event Prior to the Laschamp Geomagnetic Excursion in Eifel Maar Sediments |
title_fullStr |
Evidence for an Extreme Cooling Event Prior to the Laschamp Geomagnetic Excursion in Eifel Maar Sediments |
title_full_unstemmed |
Evidence for an Extreme Cooling Event Prior to the Laschamp Geomagnetic Excursion in Eifel Maar Sediments |
title_sort |
evidence for an extreme cooling event prior to the laschamp geomagnetic excursion in eifel maar sediments |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/quat6010014 |
op_coverage |
agris |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland permafrost |
genre_facet |
Greenland permafrost |
op_source |
Quaternary; Volume 6; Issue 1; Pages: 14 |
op_relation |
https://dx.doi.org/10.3390/quat6010014 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/quat6010014 |
container_title |
Quaternary |
container_volume |
6 |
container_issue |
1 |
container_start_page |
14 |
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1774718250063495168 |