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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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00023106 2023-05-15T16:29:07+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, M. A. Dormoy, I. Peyron, O. Siani, G. Bout Roumazeilles, V. Turon, J. L. 2013-03 electronic https://doi.org/10.5194/cp-9-767-2013 https://noa.gwlb.de/receive/cop_mods_00023106 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023061/cp-9-767-2013.pdf https://cp.copernicus.org/articles/9/767/2013/cp-9-767-2013.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-9-767-2013 https://noa.gwlb.de/receive/cop_mods_00023106 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023061/cp-9-767-2013.pdf https://cp.copernicus.org/articles/9/767/2013/cp-9-767-2013.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2013 ftnonlinearchiv https://doi.org/10.5194/cp-9-767-2013 2022-02-08T22:50:47Z 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 Niedersächsisches Online-Archiv NOA Greenland Climate of the Past 9 2 767 787 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Desprat, S. Combourieu-Nebout, N. Essallami, L. Sicre, M. A. Dormoy, I. Peyron, O. Siani, G. Bout Roumazeilles, V. Turon, J. L. Deglacial and Holocene vegetation and climatic changes in the southern Central Mediterranean from a direct land–sea correlation |
topic_facet |
article Verlagsveröffentlichung |
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, M. A. Dormoy, I. Peyron, O. Siani, G. Bout Roumazeilles, V. Turon, J. L. |
author_facet |
Desprat, S. Combourieu-Nebout, N. Essallami, L. Sicre, M. A. Dormoy, I. Peyron, O. Siani, G. Bout Roumazeilles, V. 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 Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/cp-9-767-2013 https://noa.gwlb.de/receive/cop_mods_00023106 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023061/cp-9-767-2013.pdf https://cp.copernicus.org/articles/9/767/2013/cp-9-767-2013.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet North Atlantic |
genre_facet |
Greenland Ice Sheet North Atlantic |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-9-767-2013 https://noa.gwlb.de/receive/cop_mods_00023106 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023061/cp-9-767-2013.pdf https://cp.copernicus.org/articles/9/767/2013/cp-9-767-2013.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-9-767-2013 |
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Climate of the Past |
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9 |
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2 |
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767 |
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787 |
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1766018812011872256 |