The impact of Last Glacial climate variability in west-European loess revealed by radiocarbon dating of fossil earthworm granules
The characterization of Last Glacial millennial-timescale warming phases, known as interstadials or Dansgaard-Oeschger events, requires precise chronologies for the study of paleoclimate records. On the European continent, such chronologies are only available for several Last Glacial pollen and rare...
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ftinraparis:oai:prodinra.inra.fr:407160 2023-05-15T16:00:04+02:00 The impact of Last Glacial climate variability in west-European loess revealed by radiocarbon dating of fossil earthworm granules Moine, Olivier Antoine, Pierre Hatte, Christine Landais, Amaelle Mathieu, Jérôme Prud'homme, Charlotte Rousseau, Denis-Didier 2017 application/pdf http://prodinra.inra.fr/ft/5CC0C995-2093-47F7-AF4F-0A97BC1B32DE http://prodinra.inra.fr/record/407160 https://doi.org/10.1073/pnas.1614751114 eng eng https://creativecommons.org/licenses/by/3.0/ CC-BY Proceedings of the National Academy of Sciences of the United States of America 24 (114), 6209-6214. (2017) millennial-timescale climate change;radiocarbon dating;earthworm calcite granules;Last Glacial loess;Europe ARTICLE 2017 ftinraparis https://doi.org/10.1073/pnas.1614751114 2020-02-04T23:25:36Z The characterization of Last Glacial millennial-timescale warming phases, known as interstadials or Dansgaard-Oeschger events, requires precise chronologies for the study of paleoclimate records. On the European continent, such chronologies are only available for several Last Glacial pollen and rare speleothem archives principally located in the Mediterranean domain. Farther north, in continental lowlands, numerous high-resolution records of loess and paleosols sequences show a consistent environmental response to stadial-interstadial cycles. However, the limited precision and accuracy of luminescence dating methods commonly used in loess deposits preclude exact correlations of paleosol horizons with Greenland interstadials. To overcome this problem, a radiocarbon dating protocol has been developed to date earthworm calcite granules from the reference loess sequence of Nussloch (Germany). Its application yields a consistent radiocarbon chronology of all soil horizons formed between 47 and 20 ka and unambiguously shows the correlation of every Greenland interstadial identified in isotope records with specific soil horizons. Furthermore, eight additional minor soil horizons dated between 27.5 and 21 ka only correlate with minor decreases in Greenland dust records. This dating strategy reveals the high sensitivity of loess paleoenvironments to Northern Hemisphere climate changes. A connection between loess sedimentation rate, Fennoscandian ice sheet dynamics, and sea level changes is proposed. The chronological improvements enabled by the radiocarbon "earthworm clock" thus strongly enhance our understanding of loess records to a better perception of the impact of Last Glacial climate changes on European paleoenvironments. Article in Journal/Newspaper Dansgaard-Oeschger events Fennoscandian Greenland Ice Sheet Institut National de la Recherche Agronomique: ProdINRA Greenland Proceedings of the National Academy of Sciences 114 24 6209 6214 |
institution |
Open Polar |
collection |
Institut National de la Recherche Agronomique: ProdINRA |
op_collection_id |
ftinraparis |
language |
English |
topic |
millennial-timescale climate change;radiocarbon dating;earthworm calcite granules;Last Glacial loess;Europe |
spellingShingle |
millennial-timescale climate change;radiocarbon dating;earthworm calcite granules;Last Glacial loess;Europe Moine, Olivier Antoine, Pierre Hatte, Christine Landais, Amaelle Mathieu, Jérôme Prud'homme, Charlotte Rousseau, Denis-Didier The impact of Last Glacial climate variability in west-European loess revealed by radiocarbon dating of fossil earthworm granules |
topic_facet |
millennial-timescale climate change;radiocarbon dating;earthworm calcite granules;Last Glacial loess;Europe |
description |
The characterization of Last Glacial millennial-timescale warming phases, known as interstadials or Dansgaard-Oeschger events, requires precise chronologies for the study of paleoclimate records. On the European continent, such chronologies are only available for several Last Glacial pollen and rare speleothem archives principally located in the Mediterranean domain. Farther north, in continental lowlands, numerous high-resolution records of loess and paleosols sequences show a consistent environmental response to stadial-interstadial cycles. However, the limited precision and accuracy of luminescence dating methods commonly used in loess deposits preclude exact correlations of paleosol horizons with Greenland interstadials. To overcome this problem, a radiocarbon dating protocol has been developed to date earthworm calcite granules from the reference loess sequence of Nussloch (Germany). Its application yields a consistent radiocarbon chronology of all soil horizons formed between 47 and 20 ka and unambiguously shows the correlation of every Greenland interstadial identified in isotope records with specific soil horizons. Furthermore, eight additional minor soil horizons dated between 27.5 and 21 ka only correlate with minor decreases in Greenland dust records. This dating strategy reveals the high sensitivity of loess paleoenvironments to Northern Hemisphere climate changes. A connection between loess sedimentation rate, Fennoscandian ice sheet dynamics, and sea level changes is proposed. The chronological improvements enabled by the radiocarbon "earthworm clock" thus strongly enhance our understanding of loess records to a better perception of the impact of Last Glacial climate changes on European paleoenvironments. |
format |
Article in Journal/Newspaper |
author |
Moine, Olivier Antoine, Pierre Hatte, Christine Landais, Amaelle Mathieu, Jérôme Prud'homme, Charlotte Rousseau, Denis-Didier |
author_facet |
Moine, Olivier Antoine, Pierre Hatte, Christine Landais, Amaelle Mathieu, Jérôme Prud'homme, Charlotte Rousseau, Denis-Didier |
author_sort |
Moine, Olivier |
title |
The impact of Last Glacial climate variability in west-European loess revealed by radiocarbon dating of fossil earthworm granules |
title_short |
The impact of Last Glacial climate variability in west-European loess revealed by radiocarbon dating of fossil earthworm granules |
title_full |
The impact of Last Glacial climate variability in west-European loess revealed by radiocarbon dating of fossil earthworm granules |
title_fullStr |
The impact of Last Glacial climate variability in west-European loess revealed by radiocarbon dating of fossil earthworm granules |
title_full_unstemmed |
The impact of Last Glacial climate variability in west-European loess revealed by radiocarbon dating of fossil earthworm granules |
title_sort |
impact of last glacial climate variability in west-european loess revealed by radiocarbon dating of fossil earthworm granules |
publishDate |
2017 |
url |
http://prodinra.inra.fr/ft/5CC0C995-2093-47F7-AF4F-0A97BC1B32DE http://prodinra.inra.fr/record/407160 https://doi.org/10.1073/pnas.1614751114 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Dansgaard-Oeschger events Fennoscandian Greenland Ice Sheet |
genre_facet |
Dansgaard-Oeschger events Fennoscandian Greenland Ice Sheet |
op_source |
Proceedings of the National Academy of Sciences of the United States of America 24 (114), 6209-6214. (2017) |
op_rights |
https://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1073/pnas.1614751114 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
114 |
container_issue |
24 |
container_start_page |
6209 |
op_container_end_page |
6214 |
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1766395942675677184 |