Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the intertropical convergence zone, the North Atlantic oscillation, and total solar irradiance
(IF 4.29; Q1) International audience North Africa is the largest source of mineral dust on Earth, which has multiple impacts on the climate system; however, our understanding of decadal to centennial changes in African dust emissions over the last few millenniums is limited. Here, we present a high-...
Published in: | Climate of the Past |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.science/hal-02485682 https://hal.science/hal-02485682/document https://hal.science/hal-02485682/file/cp-16-283-2020.pdf https://doi.org/10.5194/cp-16-283-2020 |
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ftceafr:oai:HAL:hal-02485682v1 |
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institution |
Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Sabatier, Pierre Nicolle, Marie Piot, Christine Colin, Christophe Debret, Maxime Swingedouw, Didier Perrette, Yves Bellingery, Marie-Charlotte Chazeau, Benjamin Develle, Anne-Lise Leblanc, Maxime Skonieczny, Charlotte Copard, Yoann Reyss, Jean-Louis Malet, Emmanuel Jouffroy-Bapicot, Isabelle Kelner, Maëlle Poulenard, Jérôme Didier, Julien Arnaud, Fabien Vannière, Boris Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the intertropical convergence zone, the North Atlantic oscillation, and total solar irradiance |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
(IF 4.29; Q1) International audience North Africa is the largest source of mineral dust on Earth, which has multiple impacts on the climate system; however, our understanding of decadal to centennial changes in African dust emissions over the last few millenniums is limited. Here, we present a high-resolution multiproxy analysis of sediment core from high-elevation Lake Bastani, on the island of Corsica, to reconstruct past African dust inputs to the western Mediterranean area over the last 3150 cal BP. Clay mineralogy with palygorskite and a clay ratio associated with geochemical data allow us to determine that terrigenous fluxes are almost exclusively related to atmospheric dust deposition from the western Sahara and Sahel areas over this period. High-resolution geochemical contents provide a reliable proxy for Saharan dust inputs with long-term (millennial) to short-term (centennial) variations. Millennial variations have been correlated with the long-term southward migration of the Intertropical Convergence Zone (ITCZ), with an increase in dust input since 1070 cal BP. This correlation suggests a strong link with the ITCZ and could reflect the increased availability of dust sources to be mobilized with an increase in wind and a decrease in precipitation over western and North Africa. For centennial to decadal variations, wavelet analyses show that since 1070 cal BP, the North Atlantic Oscillation (NAO) has been the main climatic forcing, with an increase in Saharan dust input during the positive phase, as suggested by previous studies over the last decades. However, when the ITCZ is in a northern position, before 1070 cal BP, wavelet analyses indicate that total solar irradiance (TSI) is the main forcing factor, with an increase in African dust input during low TSI. With climate reanalysis over the instrumental era, during low TSI we observe a significant negative anomaly in pressure over Africa, which is known to increase the dust transport. These two climatic forcing factors (NAO, TSI) modulate Saharan ... |
author2 |
Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Chimie Moléculaire et Environnement (LCME) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) Géosciences Paris Saclay (GEOPS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS) Laboratoire Chimie de l'environnement (LCE) Aix Marseille Université (AMU)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) 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) Océan et Interfaces (OCEANIS) 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)) Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Università di Corsica Pasquale Paoli Université de Corse Pascal Paoli Partenaires INRAE |
format |
Article in Journal/Newspaper |
author |
Sabatier, Pierre Nicolle, Marie Piot, Christine Colin, Christophe Debret, Maxime Swingedouw, Didier Perrette, Yves Bellingery, Marie-Charlotte Chazeau, Benjamin Develle, Anne-Lise Leblanc, Maxime Skonieczny, Charlotte Copard, Yoann Reyss, Jean-Louis Malet, Emmanuel Jouffroy-Bapicot, Isabelle Kelner, Maëlle Poulenard, Jérôme Didier, Julien Arnaud, Fabien Vannière, Boris |
author_facet |
Sabatier, Pierre Nicolle, Marie Piot, Christine Colin, Christophe Debret, Maxime Swingedouw, Didier Perrette, Yves Bellingery, Marie-Charlotte Chazeau, Benjamin Develle, Anne-Lise Leblanc, Maxime Skonieczny, Charlotte Copard, Yoann Reyss, Jean-Louis Malet, Emmanuel Jouffroy-Bapicot, Isabelle Kelner, Maëlle Poulenard, Jérôme Didier, Julien Arnaud, Fabien Vannière, Boris |
author_sort |
Sabatier, Pierre |
title |
Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the intertropical convergence zone, the North Atlantic oscillation, and total solar irradiance |
title_short |
Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the intertropical convergence zone, the North Atlantic oscillation, and total solar irradiance |
title_full |
Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the intertropical convergence zone, the North Atlantic oscillation, and total solar irradiance |
title_fullStr |
Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the intertropical convergence zone, the North Atlantic oscillation, and total solar irradiance |
title_full_unstemmed |
Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the intertropical convergence zone, the North Atlantic oscillation, and total solar irradiance |
title_sort |
past african dust inputs in the western mediterranean area controlled by the complex interaction between the intertropical convergence zone, the north atlantic oscillation, and total solar irradiance |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02485682 https://hal.science/hal-02485682/document https://hal.science/hal-02485682/file/cp-16-283-2020.pdf https://doi.org/10.5194/cp-16-283-2020 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-02485682 Climate of the Past, 2020, 16 (1), pp.283-298. ⟨10.5194/cp-16-283-2020⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-16-283-2020 hal-02485682 https://hal.science/hal-02485682 https://hal.science/hal-02485682/document https://hal.science/hal-02485682/file/cp-16-283-2020.pdf doi:10.5194/cp-16-283-2020 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-16-283-2020 |
container_title |
Climate of the Past |
container_volume |
16 |
container_issue |
1 |
container_start_page |
283 |
op_container_end_page |
298 |
_version_ |
1801379805295280128 |
spelling |
ftceafr:oai:HAL:hal-02485682v1 2024-06-09T07:48:12+00:00 Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the intertropical convergence zone, the North Atlantic oscillation, and total solar irradiance Sabatier, Pierre Nicolle, Marie Piot, Christine Colin, Christophe Debret, Maxime Swingedouw, Didier Perrette, Yves Bellingery, Marie-Charlotte Chazeau, Benjamin Develle, Anne-Lise Leblanc, Maxime Skonieczny, Charlotte Copard, Yoann Reyss, Jean-Louis Malet, Emmanuel Jouffroy-Bapicot, Isabelle Kelner, Maëlle Poulenard, Jérôme Didier, Julien Arnaud, Fabien Vannière, Boris Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Chimie Moléculaire et Environnement (LCME) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) Géosciences Paris Saclay (GEOPS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS) Laboratoire Chimie de l'environnement (LCE) Aix Marseille Université (AMU)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) 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) Océan et Interfaces (OCEANIS) 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)) Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Università di Corsica Pasquale Paoli Université de Corse Pascal Paoli Partenaires INRAE 2020 https://hal.science/hal-02485682 https://hal.science/hal-02485682/document https://hal.science/hal-02485682/file/cp-16-283-2020.pdf https://doi.org/10.5194/cp-16-283-2020 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-16-283-2020 hal-02485682 https://hal.science/hal-02485682 https://hal.science/hal-02485682/document https://hal.science/hal-02485682/file/cp-16-283-2020.pdf doi:10.5194/cp-16-283-2020 info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-02485682 Climate of the Past, 2020, 16 (1), pp.283-298. ⟨10.5194/cp-16-283-2020⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2020 ftceafr https://doi.org/10.5194/cp-16-283-2020 2024-05-16T14:58:22Z (IF 4.29; Q1) International audience North Africa is the largest source of mineral dust on Earth, which has multiple impacts on the climate system; however, our understanding of decadal to centennial changes in African dust emissions over the last few millenniums is limited. Here, we present a high-resolution multiproxy analysis of sediment core from high-elevation Lake Bastani, on the island of Corsica, to reconstruct past African dust inputs to the western Mediterranean area over the last 3150 cal BP. Clay mineralogy with palygorskite and a clay ratio associated with geochemical data allow us to determine that terrigenous fluxes are almost exclusively related to atmospheric dust deposition from the western Sahara and Sahel areas over this period. High-resolution geochemical contents provide a reliable proxy for Saharan dust inputs with long-term (millennial) to short-term (centennial) variations. Millennial variations have been correlated with the long-term southward migration of the Intertropical Convergence Zone (ITCZ), with an increase in dust input since 1070 cal BP. This correlation suggests a strong link with the ITCZ and could reflect the increased availability of dust sources to be mobilized with an increase in wind and a decrease in precipitation over western and North Africa. For centennial to decadal variations, wavelet analyses show that since 1070 cal BP, the North Atlantic Oscillation (NAO) has been the main climatic forcing, with an increase in Saharan dust input during the positive phase, as suggested by previous studies over the last decades. However, when the ITCZ is in a northern position, before 1070 cal BP, wavelet analyses indicate that total solar irradiance (TSI) is the main forcing factor, with an increase in African dust input during low TSI. With climate reanalysis over the instrumental era, during low TSI we observe a significant negative anomaly in pressure over Africa, which is known to increase the dust transport. These two climatic forcing factors (NAO, TSI) modulate Saharan ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Climate of the Past 16 1 283 298 |