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 c...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-09-01
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| Series: | Climate of the Past |
| Online Access: | https://www.clim-past.net/13/1181/2017/cp-13-1181-2017.pdf |
| _version_ | 1818136710542786560 |
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| author | D.-D. Rousseau D.-D. Rousseau D.-D. Rousseau A. Svensson M. Bigler A. Sima J. P. Steffensen N. Boers |
| author_facet | D.-D. Rousseau D.-D. Rousseau D.-D. Rousseau A. Svensson M. Bigler A. Sima J. P. Steffensen N. Boers |
| author_sort | D.-D. Rousseau |
| collection | DOAJ |
| 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 <i>δ</i><sup>18</sup>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. |
| first_indexed | 2024-12-11T09:44:44Z |
| format | Article |
| id | doaj.art-bb7b428dfaca47ba886fd102ee9ca10d |
| institution | Directory Open Access Journal |
| issn | 1814-9324 1814-9332 |
| language | English |
| last_indexed | 2024-12-11T09:44:44Z |
| publishDate | 2017-09-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Climate of the Past |
| spelling | doaj.art-bb7b428dfaca47ba886fd102ee9ca10d2022-12-22T01:12:35ZengCopernicus PublicationsClimate of the Past1814-93241814-93322017-09-01131181119710.5194/cp-13-1181-2017Eurasian contribution to the last glacial dust cycle: how are loess sequences built?D.-D. Rousseau0D.-D. Rousseau1D.-D. Rousseau2A. Svensson3M. Bigler4A. Sima5J. P. Steffensen6N. Boers7Ecole Normale Supérieure, UMR CNRS 8539, Laboratoire de Météorologie Dynamique, and CERES-ERTI, 24 rue Lhomond, 75231 Paris CEDEX 5, FranceLamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA Invited contribution by Denis-Didier Rousseau, recipient of the EGU Hans Oeschger Medal 2017. Centre for Ice and Climate – Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen OE, DenmarkPhysics Institute, Climate and Environment Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, SwitzerlandEcole Normale Supérieure, UMR CNRS 8539, Laboratoire de Météorologie Dynamique, and CERES-ERTI, 24 rue Lhomond, 75231 Paris CEDEX 5, FranceCentre for Ice and Climate – Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen OE, DenmarkEcole Normale Supérieure, UMR CNRS 8539, Laboratoire de Météorologie Dynamique, and CERES-ERTI, 24 rue Lhomond, 75231 Paris CEDEX 5, FranceThe 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 <i>δ</i><sup>18</sup>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.https://www.clim-past.net/13/1181/2017/cp-13-1181-2017.pdf |
| spellingShingle | D.-D. Rousseau D.-D. Rousseau D.-D. Rousseau A. Svensson M. Bigler A. Sima J. P. Steffensen N. Boers Eurasian contribution to the last glacial dust cycle: how are loess sequences built? Climate of the Past |
| title | 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_short | 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 |
| url | https://www.clim-past.net/13/1181/2017/cp-13-1181-2017.pdf |
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