Dansgaard–Oeschger-like events of the penultimate climate cycle: the loess point of view
The global character of the millennial-scale climate variability associated with the Dansgaard–Oeschger (DO) events in Greenland has been well-established for the last glacial cycle. Mainly due to the sparsity of reliable data, however, the spatial coherence of corresponding variability during the p...
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fttriple:oai:gotriple.eu:Nv_WNq9GuWH9E9QJwyztc 2023-05-15T16:28:19+02:00 Dansgaard–Oeschger-like events of the penultimate climate cycle: the loess point of view Rousseau, Denis-Didier Antoine, Pierre Boers, Niklas Lagroix, France Ghil, Michael Lomax, Johanna Fuchs, Markus Debret, Maxime Hatté, Christine Moine, Olivier Gauthier, Caroline Jordanova, Diana Jordanova, Neli 2020-04-09 https://doi.org/10.5194/cp-16-713-2020 https://cp.copernicus.org/articles/16/713/2020/ en eng Copernicus Publications doi:10.5194/cp-16-713-2020 10670/1.u0dx9x 1814-9324 1814-9332 https://cp.copernicus.org/articles/16/713/2020/ undefined Geographica Helvetica - geography eISSN: 1814-9332 envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.5194/cp-16-713-2020 2023-01-22T17:54:47Z The global character of the millennial-scale climate variability associated with the Dansgaard–Oeschger (DO) events in Greenland has been well-established for the last glacial cycle. Mainly due to the sparsity of reliable data, however, the spatial coherence of corresponding variability during the penultimate cycle is less clear. New investigations of European loess records from Marine Isotope Stage (MIS) 6 reveal the occurrence of alternating loess intervals and paleosols (incipient soil horizons), similar to those from the last climatic cycle. These paleosols are correlated, based on their stratigraphical position and numbers as well as available optically stimulated luminescence (OSL) dates, with interstadials described in various Northern Hemisphere records and in GLt_syn, the synthetic 800 kyr record of Greenland ice core δ18O. Therefore, referring to the interstadials described in the record of the last climate cycle in European loess sequences, the four MIS 6 interstadials can confidently be interpreted as DO-like events of the penultimate climate cycle. Six more interstadials are identified from proxy measurements performed on the same interval, leading to a total of 10 interstadials with a DO-like event status. The statistical similarity between the millennial-scale loess–paleosol oscillations during the last and penultimate climate cycle provides direct empirical evidence that the cycles of the penultimate cycle are indeed of the same nature as the DO cycles originally discovered for the last glacial cycle. Our results thus imply that their underlying cause and global imprint were characteristic of at least the last two climate cycles. Article in Journal/Newspaper Greenland Greenland ice core ice core Unknown Greenland Climate of the Past 16 2 713 727 |
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language |
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envir geo |
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envir geo Rousseau, Denis-Didier Antoine, Pierre Boers, Niklas Lagroix, France Ghil, Michael Lomax, Johanna Fuchs, Markus Debret, Maxime Hatté, Christine Moine, Olivier Gauthier, Caroline Jordanova, Diana Jordanova, Neli Dansgaard–Oeschger-like events of the penultimate climate cycle: the loess point of view |
topic_facet |
envir geo |
description |
The global character of the millennial-scale climate variability associated with the Dansgaard–Oeschger (DO) events in Greenland has been well-established for the last glacial cycle. Mainly due to the sparsity of reliable data, however, the spatial coherence of corresponding variability during the penultimate cycle is less clear. New investigations of European loess records from Marine Isotope Stage (MIS) 6 reveal the occurrence of alternating loess intervals and paleosols (incipient soil horizons), similar to those from the last climatic cycle. These paleosols are correlated, based on their stratigraphical position and numbers as well as available optically stimulated luminescence (OSL) dates, with interstadials described in various Northern Hemisphere records and in GLt_syn, the synthetic 800 kyr record of Greenland ice core δ18O. Therefore, referring to the interstadials described in the record of the last climate cycle in European loess sequences, the four MIS 6 interstadials can confidently be interpreted as DO-like events of the penultimate climate cycle. Six more interstadials are identified from proxy measurements performed on the same interval, leading to a total of 10 interstadials with a DO-like event status. The statistical similarity between the millennial-scale loess–paleosol oscillations during the last and penultimate climate cycle provides direct empirical evidence that the cycles of the penultimate cycle are indeed of the same nature as the DO cycles originally discovered for the last glacial cycle. Our results thus imply that their underlying cause and global imprint were characteristic of at least the last two climate cycles. |
format |
Article in Journal/Newspaper |
author |
Rousseau, Denis-Didier Antoine, Pierre Boers, Niklas Lagroix, France Ghil, Michael Lomax, Johanna Fuchs, Markus Debret, Maxime Hatté, Christine Moine, Olivier Gauthier, Caroline Jordanova, Diana Jordanova, Neli |
author_facet |
Rousseau, Denis-Didier Antoine, Pierre Boers, Niklas Lagroix, France Ghil, Michael Lomax, Johanna Fuchs, Markus Debret, Maxime Hatté, Christine Moine, Olivier Gauthier, Caroline Jordanova, Diana Jordanova, Neli |
author_sort |
Rousseau, Denis-Didier |
title |
Dansgaard–Oeschger-like events of the penultimate climate cycle: the loess point of view |
title_short |
Dansgaard–Oeschger-like events of the penultimate climate cycle: the loess point of view |
title_full |
Dansgaard–Oeschger-like events of the penultimate climate cycle: the loess point of view |
title_fullStr |
Dansgaard–Oeschger-like events of the penultimate climate cycle: the loess point of view |
title_full_unstemmed |
Dansgaard–Oeschger-like events of the penultimate climate cycle: the loess point of view |
title_sort |
dansgaard–oeschger-like events of the penultimate climate cycle: the loess point of view |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/cp-16-713-2020 https://cp.copernicus.org/articles/16/713/2020/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core |
genre_facet |
Greenland Greenland ice core ice core |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-16-713-2020 10670/1.u0dx9x 1814-9324 1814-9332 https://cp.copernicus.org/articles/16/713/2020/ |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-16-713-2020 |
container_title |
Climate of the Past |
container_volume |
16 |
container_issue |
2 |
container_start_page |
713 |
op_container_end_page |
727 |
_version_ |
1766017969536630784 |