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 Printable version |
Events of persistent dryness in the Mediterranean throughout the last 50 000 years |
Science et changements planétaires / Sécheresse. Volume 20, Number 2, 210-6, avril-mai-juin 2009, Article de recherche
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 Résumé
Article gratuit
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Author(s) : Nathalie Combourieu Nebout, Viviane Bout-Roumazeilles, Isabelle Dormoy, Odile Peyron |
Summary : Recent drought and heat waves in the Mediterranean have brought increased attention to high population density and the weakness of water resources. Studying past droughts may supply information to help understand their mechanisms. Mineralogy, pollen records and pollen-based reconstruction from Site ODP 976, collected in the Alboran Sea, show that several droughts occurred during the past 50 kyr. These events correspond to a significant development of semi desertic environments and increased wind from the Saharan arid area. This situation implies atmospheric conditions close to the present day positive situation of the North Atlantic Oscillation (NAO) during these droughts that resulted in a high level of stability over the west Mediterranean and favoured wind transport from the South. |
Keywords : atmospheric circulation, dryness, Heinrich events, Mediterranean, vegetation |
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