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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Tracking atmospheric and riverine terrigenous supplies variability during the last glacial and the Holocene in central Mediterranean
Climate of the Past, Volume 9, No. 3, Year 2013
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Description
A multiproxy study - coupling mineralogical, grain size and geochemical approaches - was used to tentatively retrace eolian and fluvial contributions to sedimentation in the Sicilian-Tunisian Strait since the last glacial. The eolian supply is dominant over the whole interval, excepted during the sapropel S1 when riverine contribution apparently became significant. Saharan contribution increased during the Bølling-Allerød, evidencing the persistence of aridity over North Africa although the northern Mediterranean already experienced moister and warmer conditions. The Younger Dryas is marked by proximal dust inputs, highlighting intense regional eolian activity. A southward migration of dust provenance toward Sahel occurred at the onset of the Holocene, likely resulting from a southward position of the Inter Tropical Convergence Zone that was probably associated with a large-scale atmospheric reorganization. Finally, a peculiar high terrigenous flux associated with drastic modifications of the mineralogical and geochemical sediment signature occurred during the sapropel S1, suggesting the propagation of fine particles derived from major floodings of the Nile River - resulting from enhanced rainfall on northeastern Africa - and their transportation across the Sicilian-Tunisian Strait by intermediate water masses. © Author(s) 2013.
Authors & Co-Authors
Bout-Roumazeilles, Viviane
France, Lille
Université de Lille
Combourieu-Nebout, Nathalie
France, Versailles
Université de Versailles Saint-quentin-en-yvelines
Desprat, Stéphanie
France, Pessac
Environnements et Paléoenvironnements Océaniques et Continentaux
Siani, Giuseppe
France, Orsay
Géosciences Paris Sud Geops
Turon, Jean Louis
France, Pessac
Environnements et Paléoenvironnements Océaniques et Continentaux
Essallami, Latifa
Tunisia, Sfax
University of Sfax
Statistics
Citations: 54
Authors: 6
Affiliations: 5
Identifiers
Doi:
10.5194/cp-9-1065-2013
ISSN:
18149324
e-ISSN:
18149332
Research Areas
Environmental
Study Locations
Multi-countries