Paleodust cycle in Europe during the last climate cycle
International audience The Last Climate Cycle (LCC, 130-15kyr) has shown cold, dusty (GS) and warmer, non-dusty (GI) intervals, when the atmosphere was 2-20 times more loaded with dust than today. The alternations between GS and GI occurred on millennial time scales, involving climate forcings other...
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HAL CCSD
2023
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Online Access: | https://hal.science/hal-04289667 https://hal.science/hal-04289667/document https://hal.science/hal-04289667/file/EGU23-3449-print.pdf https://doi.org/10.5194/egusphere-egu23-3449 |
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ftuniversailles:oai:HAL:hal-04289667v1 |
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record_format |
openpolar |
institution |
Open Polar |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Rousseau, Denis-Didier Antoine, Pierre Chauvel, Catherine Saulnier-Copard, Ségolène Lagroix, France Hatté, Christine Hopcroft, Peter Fuchs, Markus Paleodust cycle in Europe during the last climate cycle |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The Last Climate Cycle (LCC, 130-15kyr) has shown cold, dusty (GS) and warmer, non-dusty (GI) intervals, when the atmosphere was 2-20 times more loaded with dust than today. The alternations between GS and GI occurred on millennial time scales, involving climate forcings other than orbital. The transition between GS and GI lasted on average 50 yrs, resulting from a complete climate reorganization that is not presently understood. A data-model project has acquired and investigated European loess sequences to get high-resolution and well-dated paleodust records of the LCC showing Europe experienced millennial paleodust variations through paleosol-loess unit alternations. These alternations correspond to the millennial climate variability as expressed in the Greenland ice cores, with the paleosol developments occurring during GIs, and loess deposition during GSs. Although evidenced for the last climate cycle along a 50°N transect from Brittany to Ukraine, such system prevailed at least also during the penultimate climate cycle with evidence of similar millennial climate variability during the past 192-130 ka interval, equivalent to marine isotope stage 6. Earth System Models contribute i) to characterize the source regions of the paleodust and ii) to reproduce past variations in dust deposition for key paleoclimate scenarios. A key component of our investigation analyses loess samples dated from the last glacial maximum to detect the origin of the deposited material. A first study on the bulk sediment demonstrates that the paleodust deposited over Europe along a long longitudinal transect (about 2000 km) indicates a short distance transport implying local to regional source. Targeting the <2 microns and 2-20 microns grain size fractions and comparing with the previous results from the bulk samples, preliminary results indicate a local to regional origin for the coarse (2-20 microns and bulk) material and a more distant source for the finer fraction (<2 microns), involving longer ... |
author2 |
Institut de Physique du Globe de Paris (IPGP (UMR_7154)) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Géochrononologie Traceurs Archéométrie (GEOTRAC) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Silesian University of Technology |
format |
Conference Object |
author |
Rousseau, Denis-Didier Antoine, Pierre Chauvel, Catherine Saulnier-Copard, Ségolène Lagroix, France Hatté, Christine Hopcroft, Peter Fuchs, Markus |
author_facet |
Rousseau, Denis-Didier Antoine, Pierre Chauvel, Catherine Saulnier-Copard, Ségolène Lagroix, France Hatté, Christine Hopcroft, Peter Fuchs, Markus |
author_sort |
Rousseau, Denis-Didier |
title |
Paleodust cycle in Europe during the last climate cycle |
title_short |
Paleodust cycle in Europe during the last climate cycle |
title_full |
Paleodust cycle in Europe during the last climate cycle |
title_fullStr |
Paleodust cycle in Europe during the last climate cycle |
title_full_unstemmed |
Paleodust cycle in Europe during the last climate cycle |
title_sort |
paleodust cycle in europe during the last climate cycle |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04289667 https://hal.science/hal-04289667/document https://hal.science/hal-04289667/file/EGU23-3449-print.pdf https://doi.org/10.5194/egusphere-egu23-3449 |
op_coverage |
Vienne (AUT), France |
genre |
Greenland Greenland ice cores |
genre_facet |
Greenland Greenland ice cores |
op_source |
EGU General Assembly https://hal.science/hal-04289667 EGU General Assembly, Apr 2023, Vienne (AUT), France. ⟨10.5194/egusphere-egu23-3449⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/egusphere-egu23-3449 hal-04289667 https://hal.science/hal-04289667 https://hal.science/hal-04289667/document https://hal.science/hal-04289667/file/EGU23-3449-print.pdf doi:10.5194/egusphere-egu23-3449 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/egusphere-egu23-3449 |
_version_ |
1797584063224086528 |
spelling |
ftuniversailles:oai:HAL:hal-04289667v1 2024-04-28T08:22:28+00:00 Paleodust cycle in Europe during the last climate cycle Rousseau, Denis-Didier Antoine, Pierre Chauvel, Catherine Saulnier-Copard, Ségolène Lagroix, France Hatté, Christine Hopcroft, Peter Fuchs, Markus Institut de Physique du Globe de Paris (IPGP (UMR_7154)) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Géochrononologie Traceurs Archéométrie (GEOTRAC) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Silesian University of Technology Vienne (AUT), France 2023-04-23 https://hal.science/hal-04289667 https://hal.science/hal-04289667/document https://hal.science/hal-04289667/file/EGU23-3449-print.pdf https://doi.org/10.5194/egusphere-egu23-3449 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/egusphere-egu23-3449 hal-04289667 https://hal.science/hal-04289667 https://hal.science/hal-04289667/document https://hal.science/hal-04289667/file/EGU23-3449-print.pdf doi:10.5194/egusphere-egu23-3449 info:eu-repo/semantics/OpenAccess EGU General Assembly https://hal.science/hal-04289667 EGU General Assembly, Apr 2023, Vienne (AUT), France. ⟨10.5194/egusphere-egu23-3449⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/conferenceObject Conference papers 2023 ftuniversailles https://doi.org/10.5194/egusphere-egu23-3449 2024-04-04T17:27:27Z International audience The Last Climate Cycle (LCC, 130-15kyr) has shown cold, dusty (GS) and warmer, non-dusty (GI) intervals, when the atmosphere was 2-20 times more loaded with dust than today. The alternations between GS and GI occurred on millennial time scales, involving climate forcings other than orbital. The transition between GS and GI lasted on average 50 yrs, resulting from a complete climate reorganization that is not presently understood. A data-model project has acquired and investigated European loess sequences to get high-resolution and well-dated paleodust records of the LCC showing Europe experienced millennial paleodust variations through paleosol-loess unit alternations. These alternations correspond to the millennial climate variability as expressed in the Greenland ice cores, with the paleosol developments occurring during GIs, and loess deposition during GSs. Although evidenced for the last climate cycle along a 50°N transect from Brittany to Ukraine, such system prevailed at least also during the penultimate climate cycle with evidence of similar millennial climate variability during the past 192-130 ka interval, equivalent to marine isotope stage 6. Earth System Models contribute i) to characterize the source regions of the paleodust and ii) to reproduce past variations in dust deposition for key paleoclimate scenarios. A key component of our investigation analyses loess samples dated from the last glacial maximum to detect the origin of the deposited material. A first study on the bulk sediment demonstrates that the paleodust deposited over Europe along a long longitudinal transect (about 2000 km) indicates a short distance transport implying local to regional source. Targeting the <2 microns and 2-20 microns grain size fractions and comparing with the previous results from the bulk samples, preliminary results indicate a local to regional origin for the coarse (2-20 microns and bulk) material and a more distant source for the finer fraction (<2 microns), involving longer ... Conference Object Greenland Greenland ice cores Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |