Eurasian contribution to the last glacial dust cycle: how are loess sequences built?
The last 130 000 years have been marked by pronounced millennial-scale climate variability, which strongly impacted the terrestrial environments of the Northern Hemisphere, especially at middle latitudes. Identifying the trigger of these variations, which are most likely associated with strong coupl...
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ftcopernicus:oai:publications.copernicus.org:cp58776 2023-05-15T16:27:41+02:00 Eurasian contribution to the last glacial dust cycle: how are loess sequences built? Rousseau, Denis-Didier Svensson, Anders Bigler, Matthias Sima, Adriana Steffensen, Jorgen Peder Boers, Niklas 2018-09-27 application/pdf https://doi.org/10.5194/cp-13-1181-2017 https://cp.copernicus.org/articles/13/1181/2017/ eng eng doi:10.5194/cp-13-1181-2017 https://cp.copernicus.org/articles/13/1181/2017/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-13-1181-2017 2020-07-20T16:23:36Z The last 130 000 years have been marked by pronounced millennial-scale climate variability, which strongly impacted the terrestrial environments of the Northern Hemisphere, especially at middle latitudes. Identifying the trigger of these variations, which are most likely associated with strong couplings between the ocean and the atmosphere, still remains a key question. Here, we show that the analysis of δ 18 O and dust in the Greenland ice cores, and a critical study of their source variations, reconciles these records with those observed on the Eurasian continent. We demonstrate the link between European and Chinese loess sequences, dust records in Greenland, and variations in the North Atlantic sea ice extent. The sources of the emitted and transported dust material are variable and relate to different environments corresponding to present desert areas, but also hidden regions related to lower sea level stands, dry rivers, or zones close to the frontal moraines of the main Northern Hemisphere ice sheets. We anticipate our study to be at the origin of more sophisticated and elaborated investigations of millennial and sub-millennial continental climate variability in the Northern Hemisphere. Text Greenland Greenland ice cores North Atlantic Sea ice Copernicus Publications: E-Journals Greenland Climate of the Past 13 9 1181 1197 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The last 130 000 years have been marked by pronounced millennial-scale climate variability, which strongly impacted the terrestrial environments of the Northern Hemisphere, especially at middle latitudes. Identifying the trigger of these variations, which are most likely associated with strong couplings between the ocean and the atmosphere, still remains a key question. Here, we show that the analysis of δ 18 O and dust in the Greenland ice cores, and a critical study of their source variations, reconciles these records with those observed on the Eurasian continent. We demonstrate the link between European and Chinese loess sequences, dust records in Greenland, and variations in the North Atlantic sea ice extent. The sources of the emitted and transported dust material are variable and relate to different environments corresponding to present desert areas, but also hidden regions related to lower sea level stands, dry rivers, or zones close to the frontal moraines of the main Northern Hemisphere ice sheets. We anticipate our study to be at the origin of more sophisticated and elaborated investigations of millennial and sub-millennial continental climate variability in the Northern Hemisphere. |
format |
Text |
author |
Rousseau, Denis-Didier Svensson, Anders Bigler, Matthias Sima, Adriana Steffensen, Jorgen Peder Boers, Niklas |
spellingShingle |
Rousseau, Denis-Didier Svensson, Anders Bigler, Matthias Sima, Adriana Steffensen, Jorgen Peder Boers, Niklas Eurasian contribution to the last glacial dust cycle: how are loess sequences built? |
author_facet |
Rousseau, Denis-Didier Svensson, Anders Bigler, Matthias Sima, Adriana Steffensen, Jorgen Peder Boers, Niklas |
author_sort |
Rousseau, Denis-Didier |
title |
Eurasian contribution to the last glacial dust cycle: how are loess sequences built? |
title_short |
Eurasian contribution to the last glacial dust cycle: how are loess sequences built? |
title_full |
Eurasian contribution to the last glacial dust cycle: how are loess sequences built? |
title_fullStr |
Eurasian contribution to the last glacial dust cycle: how are loess sequences built? |
title_full_unstemmed |
Eurasian contribution to the last glacial dust cycle: how are loess sequences built? |
title_sort |
eurasian contribution to the last glacial dust cycle: how are loess sequences built? |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-13-1181-2017 https://cp.copernicus.org/articles/13/1181/2017/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores North Atlantic Sea ice |
genre_facet |
Greenland Greenland ice cores North Atlantic Sea ice |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-13-1181-2017 https://cp.copernicus.org/articles/13/1181/2017/ |
op_doi |
https://doi.org/10.5194/cp-13-1181-2017 |
container_title |
Climate of the Past |
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13 |
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9 |
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1181 |
op_container_end_page |
1197 |
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1766017133678952448 |