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Modern drought conditions in western Sahel unprecedented in the past 1600 years

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dc.contributor.author Carré, M.
dc.contributor.author Azzoug, M.
dc.contributor.author Zaharias, P.
dc.contributor.author Camara, A.
dc.contributor.author Cheddadi, R.
dc.contributor.author Chevalier, M.
dc.contributor.author Fiorillo, D.
dc.contributor.author Gaye, A.T.
dc.contributor.author Janicot, S.
dc.contributor.author Khodri, M.
dc.contributor.author Lazar, A.
dc.contributor.author Lazareth, C.E.
dc.contributor.author Mignot, J.
dc.contributor.author Mitma García, N.
dc.contributor.author Patris, N.
dc.contributor.author Perrot, O.
dc.contributor.author Wade, M.
dc.date.accessioned 2019-07-04T17:00:19Z
dc.date.available 2019-07-04T17:00:19Z
dc.date.issued 2019
dc.identifier.uri https://hdl.handle.net/20.500.12866/6859
dc.description.abstract As climate model uncertainties remain very large for future rainfall in the Sahel, a multi-centennial perspective is required to assess the situation of current Sahel climate in the context of global warming. We present here the first record of hydroclimatic variability over the past 1600 years in Senegal, obtained from stable oxygen isotope analyses (δ 18 O) in archaeological shell middens from the Saloum Delta. During the preindustrial period, the region was relatively humid, with maximum humidity reached during the period from AD 1500 to AD 1800, referred to as the Little Ice Age. A significant negative link is observed at the centennial scale between global temperature and humidity in the Sahel that is at odds with the expected effects of latitudinal shifts of the intertropical convergence zone during the last millennium. In the context of the past 1600 years, the Western Sahel appears to be experiencing today unprecedented drought conditions. The rapid aridification that started ca. AD 1800 and the recent emergence of Sahel drought from the natural variability point to an anthropogenic forcing of Sahel drying trend. This new long-term perspective suggests that the recovery of Sahel rainfall in the last decade may only result from short-term internal variability, and supports climate models that predict an increase of Sahel drought under future greenhouse climate. en_US
dc.language.iso eng
dc.publisher Springer
dc.relation.ispartof urn:issn:1432-0894
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Climate change en_US
dc.subject Paleoclimate en_US
dc.subject global warming en_US
dc.subject paleoclimate en_US
dc.subject Senegal en_US
dc.subject climate variation en_US
dc.subject Shell middens en_US
dc.subject West African Monsoon en_US
dc.subject monsoon en_US
dc.subject drought en_US
dc.subject isotopic analysis en_US
dc.subject midden en_US
dc.subject oxygen isotope en_US
dc.subject Sahel [Sub-Saharan Africa] en_US
dc.subject shell en_US
dc.subject stable isotope en_US
dc.title Modern drought conditions in western Sahel unprecedented in the past 1600 years en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1007/s00382-018-4311-3
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.02.00 es_PE
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.05.09

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