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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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/D8R229J6 2023-05-15T16:27:52+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 2017 https://doi.org/10.7916/D8R229J6 English eng https://doi.org/10.7916/D8R229J6 Climatic changes Paleoclimatology Dust Loess--Environmental aspects Articles 2017 ftcolumbiauniv https://doi.org/10.7916/D8R229J6 2019-04-04T08:16:42Z 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 δ¹⁸O 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. Article in Journal/Newspaper Greenland Greenland ice cores North Atlantic Sea ice Columbia University: Academic Commons Greenland |
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Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Climatic changes Paleoclimatology Dust Loess--Environmental aspects |
spellingShingle |
Climatic changes Paleoclimatology Dust Loess--Environmental aspects 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? |
topic_facet |
Climatic changes Paleoclimatology Dust Loess--Environmental aspects |
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 δ¹⁸O 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 |
Article in Journal/Newspaper |
author |
Rousseau, Denis-Didier Svensson, Anders Bigler, Matthias Sima, Adriana Steffensen, Jorgen Peder Boers, Niklas |
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 |
2017 |
url |
https://doi.org/10.7916/D8R229J6 |
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_relation |
https://doi.org/10.7916/D8R229J6 |
op_doi |
https://doi.org/10.7916/D8R229J6 |
_version_ |
1766017436940763136 |