Deglacial and Holocene vegetation and climatic changes in the southern Central Mediterranean from a direct land-sea correlation
Despite a large number of studies, the long-term and millennial to centennial-scale climatic variability in the Mediterranean region during the last deglaciation and the Holocene is still debated, including in the southern Central Mediterranean. In this paper, we present a new marine pollen sequence...
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Online Access: | https://archimer.ifremer.fr/doc/00181/29241/27634.pdf https://doi.org/10.5194/cp-9-767-2013 https://archimer.ifremer.fr/doc/00181/29241/ |
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ftarchimer:oai:archimer.ifremer.fr:29241 2023-05-15T16:29:08+02:00 Deglacial and Holocene vegetation and climatic changes in the southern Central Mediterranean from a direct land-sea correlation Desprat, S. Combourieu-nebout, N. Essallami, L. Sicre, Marie-alexandrine Dormoy, I. Peyron, O. Siani, G. Roumazeilles, V. Bout Turon, J. L. 2013 application/pdf https://archimer.ifremer.fr/doc/00181/29241/27634.pdf https://doi.org/10.5194/cp-9-767-2013 https://archimer.ifremer.fr/doc/00181/29241/ eng eng Copernicus Gesellschaft Mbh https://archimer.ifremer.fr/doc/00181/29241/27634.pdf doi:10.5194/cp-9-767-2013 https://archimer.ifremer.fr/doc/00181/29241/ Author(s) 2013. CC Attribution 3.0 License. info:eu-repo/semantics/openAccess restricted use CC-BY Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2013 , Vol. 9 , N. 2 , P. 767-787 text Publication info:eu-repo/semantics/article 2013 ftarchimer https://doi.org/10.5194/cp-9-767-2013 2021-09-23T20:24:10Z Despite a large number of studies, the long-term and millennial to centennial-scale climatic variability in the Mediterranean region during the last deglaciation and the Holocene is still debated, including in the southern Central Mediterranean. In this paper, we present a new marine pollen sequence (core MD04-2797CQ) from the Siculo-Tunisian Strait documenting the regional vegetation and climatic changes in the southern Central Mediterranean during the last deglaciation and the Holocene. The MD04-2797CQ marine pollen sequence shows that semi-desert plants dominated the vegetal cover in the southern Central Mediterranean between 18.2 and 12.3 ka cal BP, indicating prevailing dry conditions during the deglaciation, even during the Greenland Interstadial (GI)-1. Across the transition Greenland Stadial (GS)-1 -Holocene, Asteraceae-Poaceae steppe became dominant till 10.1 ka cal BP. This record underlines with no chronological ambiguity that even though temperatures increased, deficiency in moisture availability persisted into the early Holocene. Temperate trees and shrubs with heath underbrush or maquis expanded between 10.1 and 6.6 ka, corresponding to Sapropel 1 (S1) interval, while Mediterranean plants only developed from 6.6 ka onwards. These changes in vegetal cover show that the regional climate in southern Central Mediterranean was wetter during S1 and became drier during the mid-to late Holocene. Wetter conditions during S1 were likely due to increased winter precipitation while summers remained dry. We suggest, in agreement with published modeling experiments, that the early Holocene increased melting of the Laurentide Ice Sheet in conjunction with weak winter insolation played a major role in the development of winter precipitation maxima in the Mediterranean region in controlling the strength and position of the North Atlantic storm track. Finally, our data provide evidence for centennial-scale vegetation and climatic changes in the southern Central Mediterranean. During the wet early Holocene, alkenone-derived cooling episodes are synchronous with herbaceous composition changes that indicate muted changes in precipitation. In contrast, enhanced aridity episodes, as detected by strong reduction in trees and shrubs, are recorded during the mid-to late Holocene. We show that the impact of the Holocene cooling events on the Mediterranean hydroclimate depend on baseline climate states, i.e. insolation and ice sheet extent, shaping the response of the mid-latitude atmospheric circulation. Article in Journal/Newspaper Greenland Ice Sheet North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Greenland Climate of the Past 9 2 767 787 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Despite a large number of studies, the long-term and millennial to centennial-scale climatic variability in the Mediterranean region during the last deglaciation and the Holocene is still debated, including in the southern Central Mediterranean. In this paper, we present a new marine pollen sequence (core MD04-2797CQ) from the Siculo-Tunisian Strait documenting the regional vegetation and climatic changes in the southern Central Mediterranean during the last deglaciation and the Holocene. The MD04-2797CQ marine pollen sequence shows that semi-desert plants dominated the vegetal cover in the southern Central Mediterranean between 18.2 and 12.3 ka cal BP, indicating prevailing dry conditions during the deglaciation, even during the Greenland Interstadial (GI)-1. Across the transition Greenland Stadial (GS)-1 -Holocene, Asteraceae-Poaceae steppe became dominant till 10.1 ka cal BP. This record underlines with no chronological ambiguity that even though temperatures increased, deficiency in moisture availability persisted into the early Holocene. Temperate trees and shrubs with heath underbrush or maquis expanded between 10.1 and 6.6 ka, corresponding to Sapropel 1 (S1) interval, while Mediterranean plants only developed from 6.6 ka onwards. These changes in vegetal cover show that the regional climate in southern Central Mediterranean was wetter during S1 and became drier during the mid-to late Holocene. Wetter conditions during S1 were likely due to increased winter precipitation while summers remained dry. We suggest, in agreement with published modeling experiments, that the early Holocene increased melting of the Laurentide Ice Sheet in conjunction with weak winter insolation played a major role in the development of winter precipitation maxima in the Mediterranean region in controlling the strength and position of the North Atlantic storm track. Finally, our data provide evidence for centennial-scale vegetation and climatic changes in the southern Central Mediterranean. During the wet early Holocene, alkenone-derived cooling episodes are synchronous with herbaceous composition changes that indicate muted changes in precipitation. In contrast, enhanced aridity episodes, as detected by strong reduction in trees and shrubs, are recorded during the mid-to late Holocene. We show that the impact of the Holocene cooling events on the Mediterranean hydroclimate depend on baseline climate states, i.e. insolation and ice sheet extent, shaping the response of the mid-latitude atmospheric circulation. |
format |
Article in Journal/Newspaper |
author |
Desprat, S. Combourieu-nebout, N. Essallami, L. Sicre, Marie-alexandrine Dormoy, I. Peyron, O. Siani, G. Roumazeilles, V. Bout Turon, J. L. |
spellingShingle |
Desprat, S. Combourieu-nebout, N. Essallami, L. Sicre, Marie-alexandrine Dormoy, I. Peyron, O. Siani, G. Roumazeilles, V. Bout Turon, J. L. Deglacial and Holocene vegetation and climatic changes in the southern Central Mediterranean from a direct land-sea correlation |
author_facet |
Desprat, S. Combourieu-nebout, N. Essallami, L. Sicre, Marie-alexandrine Dormoy, I. Peyron, O. Siani, G. Roumazeilles, V. Bout Turon, J. L. |
author_sort |
Desprat, S. |
title |
Deglacial and Holocene vegetation and climatic changes in the southern Central Mediterranean from a direct land-sea correlation |
title_short |
Deglacial and Holocene vegetation and climatic changes in the southern Central Mediterranean from a direct land-sea correlation |
title_full |
Deglacial and Holocene vegetation and climatic changes in the southern Central Mediterranean from a direct land-sea correlation |
title_fullStr |
Deglacial and Holocene vegetation and climatic changes in the southern Central Mediterranean from a direct land-sea correlation |
title_full_unstemmed |
Deglacial and Holocene vegetation and climatic changes in the southern Central Mediterranean from a direct land-sea correlation |
title_sort |
deglacial and holocene vegetation and climatic changes in the southern central mediterranean from a direct land-sea correlation |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2013 |
url |
https://archimer.ifremer.fr/doc/00181/29241/27634.pdf https://doi.org/10.5194/cp-9-767-2013 https://archimer.ifremer.fr/doc/00181/29241/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet North Atlantic |
genre_facet |
Greenland Ice Sheet North Atlantic |
op_source |
Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2013 , Vol. 9 , N. 2 , P. 767-787 |
op_relation |
https://archimer.ifremer.fr/doc/00181/29241/27634.pdf doi:10.5194/cp-9-767-2013 https://archimer.ifremer.fr/doc/00181/29241/ |
op_rights |
Author(s) 2013. CC Attribution 3.0 License. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-9-767-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
2 |
container_start_page |
767 |
op_container_end_page |
787 |
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1766018818861170688 |