Environmental changes, climate and anthropogenic impact in southern-eastern Tunisia during the last 8 kyr
International audience Pollen and clay mineralogical analyses of a Holocene sequence from Sebkha Boujmel (southern Tunisia) traces the climatic and environmental dynamics in the lower arid bioclimatic zone over the last 8000 years. During the Mid-to Late Holocene transition, between 8 and 3 ka, a su...
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Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2021
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Online Access: | https://hal.archives-ouvertes.fr/hal-03280454 https://hal.archives-ouvertes.fr/hal-03280454/document https://hal.archives-ouvertes.fr/hal-03280454/file/cp-2016-25.pdf https://doi.org/10.5194/cp-2016-25 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes Jaouadi, Sahbi Lebreton, Vincent Bout‑Roumazeilles, Viviane Siani, Giuseppe Lakhdar, Rached Boussoffara, Ridha Dezileau, Laurent Kallel, Nejib Mannai-Tayech, Beya Combourieu-Nebout, Nathalie Environmental changes, climate and anthropogenic impact in southern-eastern Tunisia during the last 8 kyr |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Pollen and clay mineralogical analyses of a Holocene sequence from Sebkha Boujmel (southern Tunisia) traces the climatic and environmental dynamics in the lower arid bioclimatic zone over the last 8000 years. During the Mid-to Late Holocene transition, between 8 and 3 ka, a succession of five wet/dry oscillations is recorded. An intense arid event occurs between 5.7 and 4.6 ka. This episode marks the onset of a long-term aridification trend with a progressive retreat of Mediterranean woody xerophytic vegetation and of grass steppes. It ends with the establishment of pre-desert ecosystems around 3 ka. The millennial-scale climate change recorded in the data from Sebkha Boujmel is consistent with records from the south and east Mediterranean, as well as with climatic records from the desert region for the end of the African Humid Period (AHP). Eight centennial climatic events are recorded at Sebkha Boujmel and these are contemporary with those recorded in the Mediterranean and in the Sahara. They indicate a clear coupling between the southern Mediterranean and the Sahara before 3 ka. The event at 4.2 ka is not evidenced and the link between events recorded in Sebkha Boujmel and the North Atlantic Cooling events is clearer from 3 ka onwards. These variations indicate the importance of climatic determinism in the structuring of landscapes, with the establishment of the arid climatic conditions of the Late Holocene. It is only from 3 ka onwards that the dynamic of plant associations is modified by both human activity and climatic variability. The climatic episodes identified during the historic period indicate strong regionalisation related to the differential impact of the North Atlantic Oscillation (NAO) and the Mediterranean Oscillation (MO) on the Mediterranean basin. The local human impact on regional ecosystems is recorded in the form of episodes of intensification of pastoral and/or agricultural activities. The development of olive production and of several taxa associated with ... |
author2 |
Histoire naturelle de l'Homme préhistorique (HNHP) Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Centre National de la Recherche Scientifique (CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut national des sciences de l'Univers (INSU - CNRS) Interactions et dynamique des environnements de surface (IDES) Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Université de Carthage - University of Carthage Institut national du patrimoine (INP) Géosciences Montpellier Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Université des Antilles (UA)-Centre National de la Recherche Scientifique (CNRS) Université de Sfax - University of Sfax Université de Tunis El Manar (UTM) |
format |
Article in Journal/Newspaper |
author |
Jaouadi, Sahbi Lebreton, Vincent Bout‑Roumazeilles, Viviane Siani, Giuseppe Lakhdar, Rached Boussoffara, Ridha Dezileau, Laurent Kallel, Nejib Mannai-Tayech, Beya Combourieu-Nebout, Nathalie |
author_facet |
Jaouadi, Sahbi Lebreton, Vincent Bout‑Roumazeilles, Viviane Siani, Giuseppe Lakhdar, Rached Boussoffara, Ridha Dezileau, Laurent Kallel, Nejib Mannai-Tayech, Beya Combourieu-Nebout, Nathalie |
author_sort |
Jaouadi, Sahbi |
title |
Environmental changes, climate and anthropogenic impact in southern-eastern Tunisia during the last 8 kyr |
title_short |
Environmental changes, climate and anthropogenic impact in southern-eastern Tunisia during the last 8 kyr |
title_full |
Environmental changes, climate and anthropogenic impact in southern-eastern Tunisia during the last 8 kyr |
title_fullStr |
Environmental changes, climate and anthropogenic impact in southern-eastern Tunisia during the last 8 kyr |
title_full_unstemmed |
Environmental changes, climate and anthropogenic impact in southern-eastern Tunisia during the last 8 kyr |
title_sort |
environmental changes, climate and anthropogenic impact in southern-eastern tunisia during the last 8 kyr |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03280454 https://hal.archives-ouvertes.fr/hal-03280454/document https://hal.archives-ouvertes.fr/hal-03280454/file/cp-2016-25.pdf https://doi.org/10.5194/cp-2016-25 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 1814-9340 EISSN: 1814-9359 Climate of the Past Discussions https://hal.archives-ouvertes.fr/hal-03280454 Climate of the Past Discussions, European Geosciences Union (EGU), In press, ⟨10.5194/cp-2016-25⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-2016-25 hal-03280454 https://hal.archives-ouvertes.fr/hal-03280454 https://hal.archives-ouvertes.fr/hal-03280454/document https://hal.archives-ouvertes.fr/hal-03280454/file/cp-2016-25.pdf doi:10.5194/cp-2016-25 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-2016-25 |
_version_ |
1766130759999946752 |
spelling |
ftccsdartic:oai:HAL:hal-03280454v1 2023-05-15T17:32:34+02:00 Environmental changes, climate and anthropogenic impact in southern-eastern Tunisia during the last 8 kyr Jaouadi, Sahbi Lebreton, Vincent Bout‑Roumazeilles, Viviane Siani, Giuseppe Lakhdar, Rached Boussoffara, Ridha Dezileau, Laurent Kallel, Nejib Mannai-Tayech, Beya Combourieu-Nebout, Nathalie Histoire naturelle de l'Homme préhistorique (HNHP) Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Centre National de la Recherche Scientifique (CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut national des sciences de l'Univers (INSU - CNRS) Interactions et dynamique des environnements de surface (IDES) Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Université de Carthage - University of Carthage Institut national du patrimoine (INP) Géosciences Montpellier Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Université des Antilles (UA)-Centre National de la Recherche Scientifique (CNRS) Université de Sfax - University of Sfax Université de Tunis El Manar (UTM) 2021 https://hal.archives-ouvertes.fr/hal-03280454 https://hal.archives-ouvertes.fr/hal-03280454/document https://hal.archives-ouvertes.fr/hal-03280454/file/cp-2016-25.pdf https://doi.org/10.5194/cp-2016-25 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-2016-25 hal-03280454 https://hal.archives-ouvertes.fr/hal-03280454 https://hal.archives-ouvertes.fr/hal-03280454/document https://hal.archives-ouvertes.fr/hal-03280454/file/cp-2016-25.pdf doi:10.5194/cp-2016-25 info:eu-repo/semantics/OpenAccess ISSN: 1814-9340 EISSN: 1814-9359 Climate of the Past Discussions https://hal.archives-ouvertes.fr/hal-03280454 Climate of the Past Discussions, European Geosciences Union (EGU), In press, ⟨10.5194/cp-2016-25⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.5194/cp-2016-25 2021-11-27T23:46:29Z International audience Pollen and clay mineralogical analyses of a Holocene sequence from Sebkha Boujmel (southern Tunisia) traces the climatic and environmental dynamics in the lower arid bioclimatic zone over the last 8000 years. During the Mid-to Late Holocene transition, between 8 and 3 ka, a succession of five wet/dry oscillations is recorded. An intense arid event occurs between 5.7 and 4.6 ka. This episode marks the onset of a long-term aridification trend with a progressive retreat of Mediterranean woody xerophytic vegetation and of grass steppes. It ends with the establishment of pre-desert ecosystems around 3 ka. The millennial-scale climate change recorded in the data from Sebkha Boujmel is consistent with records from the south and east Mediterranean, as well as with climatic records from the desert region for the end of the African Humid Period (AHP). Eight centennial climatic events are recorded at Sebkha Boujmel and these are contemporary with those recorded in the Mediterranean and in the Sahara. They indicate a clear coupling between the southern Mediterranean and the Sahara before 3 ka. The event at 4.2 ka is not evidenced and the link between events recorded in Sebkha Boujmel and the North Atlantic Cooling events is clearer from 3 ka onwards. These variations indicate the importance of climatic determinism in the structuring of landscapes, with the establishment of the arid climatic conditions of the Late Holocene. It is only from 3 ka onwards that the dynamic of plant associations is modified by both human activity and climatic variability. The climatic episodes identified during the historic period indicate strong regionalisation related to the differential impact of the North Atlantic Oscillation (NAO) and the Mediterranean Oscillation (MO) on the Mediterranean basin. The local human impact on regional ecosystems is recorded in the form of episodes of intensification of pastoral and/or agricultural activities. The development of olive production and of several taxa associated with ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |