气候变化领域集成服务门户(CCPortal): Modern drought conditions in western Sahel unprecedented in the past 1600 years

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DOI	10.1007/s00382-018-4311-3
	Modern drought conditions in western Sahel unprecedented in the past 1600 years
	Carré M.; Azzoug M.; Zaharias P.; Camara A.; Cheddadi R.; Chevalier M.; Fiorillo D.; Gaye A.T.; Janicot S.; Khodri M.; Lazar A.; Lazareth C.E.; Mignot J.; Mitma García N.; Patris N.; Perrot O.; Wade M.
发表日期	2019
ISSN	0930-7575
起始页码	1949
结束页码	1964
卷号	52 期号:2020-03-04
英文摘要	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. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Climate change; Paleoclimate; Shell middens; West African Monsoon
语种	英语
scopus关键词	climate variation; drought; global warming; isotopic analysis; midden; monsoon; oxygen isotope; paleoclimate; shell; stable isotope; Sahel [Sub-Saharan Africa]; Senegal
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146517
作者单位	LOCEAN Laboratory, Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, Paris, France; CIDIS-LID-Facultad de Ciencias y Filosofía-Universidad Peruana Cayetano Heredia, Lima, Peru; Département de Génie des Procédés, Faculté de Technologie, Université de Bejaia, Bejaïa, 06000, Algeria; ISYEB-UMR 7205-CNRS, MNHN, UPMC (Université Paris 6), EPHE-Muséum National d’Histoire Naturelle, Sorbonne Universités, Paris, France; Institut Fondamental d’Afrique Noire, Université Cheikh Anta Diop, Dakar, Senegal; CNRS-UM-IRD-EPHE, Institut des Sciences de l’Evolution de Montpellier, Montpellier, France; Institut des Dynamiques de la Surface Terrestre, University of Lausanne, Lausanne, Switzerland; CNRS-MNHN, Archéozoologie, Archéobotanique: Sociétés, Pratiques et Environnements, Paris, France; Institut Polytechnique, Université Cheikh Anta Diop, Dakar, Senegal; IRD-CNRS-UM, Hydrosciences Montpellier, Montpellier, France; Laboratoire de Physique de l’Atmosphere et de l’Ocean Simeon Fongang, Université Cheikh Anta Diop...
推荐引用方式 GB/T 7714	Carré M.,Azzoug M.,Zaharias P.,et al. Modern drought conditions in western Sahel unprecedented in the past 1600 years[J],2019,52(2020-03-04).
APA	Carré M..,Azzoug M..,Zaharias P..,Camara A..,Cheddadi R..,...&Wade M..(2019).Modern drought conditions in western Sahel unprecedented in the past 1600 years.Climate Dynamics,52(2020-03-04).
MLA	Carré M.,et al."Modern drought conditions in western Sahel unprecedented in the past 1600 years".Climate Dynamics 52.2020-03-04(2019).