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<title lang=en>Hydrodynamics in Holocene Lake Mega-Chad</title>
<creator>Bouchette, Frederic</creator>
<creator>Schuster, Mathieu</creator>
<creator>Ghienne, Jean-Francois</creator>
<creator>Denamiel, Clea</creator>
<creator>Roquin, Claude</creator>
<creator>Moussa, Abderamane</creator>
<creator>Marsaleix, Patrick</creator>
<creator>Duringer, Philippe</creator>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Institut International de Paléoprimatologie, Paléontologie Humaine : Evolution et Paléoenvironnement (IPHEP) ; Université de Poitiers - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Institut de physique du globe de Strasbourg (IPGS) ; Centre National de la Recherche Scientifique (CNRS) - Institut national des sciences de l'Univers (INSU - CNRS)</contributor>
<contributor>HR-Wallingford, ; Université du Québec</contributor>
<contributor>Laboratoire d'aérologie - LA (LA) ; Université Paul Sabatier - Toulouse 3 (UPS) - Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire Midi-Pyrénées (OMP) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0033-5894</source>
<source>EISSN: 1096-0287</source>
<source>Quaternary Research</source>
<publisher>Elsevier</publisher>
<identifier>hal-00475633</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00475633</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00475633</source>
<source>Quaternary Research, Elsevier, 2010, 73 (2), pp.226-236. 〈10.1016/j.yqres.2009.10.010〉</source>
<identifier>DOI : 10.1016/j.yqres.2009.10.010</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.yqres.2009.10.010</relation>
<language>en</language>
<subject lang=en>Wind-driven circulation</subject>
<subject lang=en>Sand spits</subject>
<subject lang=en>Wave-cut terrace</subject>
<subject lang=en>Monsoon</subject>
<subject lang=en>Trade winds</subject>
<subject lang=en>SYMPHONIE</subject>
<subject lang=en>Coastal modelling</subject>
<subject lang=en>Paleo-lake</subject>
<subject lang=en>Africa</subject>
<subject lang=en>Sahara</subject>
<subject lang=en>Alongshore drift</subject>
<subject>[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Holocene Lake Mega-Chad (LMC) was the largest late Quaternary water-body in Africa. The development of this giant paleo-lake is related to a northward shift of the isohyetes interpreted as evidence for an enhanced Monsoon (African Humid Period). Numerous preserved coastal features have been described all around the LMC shore. Such features reveal the main paleo-hydrodynamical tendencies. In the context of a closed water-body like LMC, hydrodynamics are forced mainly by winds. We use a three-dimensional numerical model (SYMPHONIE) to simulate the mean hydrodynamics in LMC under both Harmattan-like (northeasterly trade winds) and Monsoon-like (southwesterly winds) forcings. The northern part of LMC displays coastal features, such as sand spits, that are consistent with the simulations forced by Harmattan-like winds. Geomorphic features related to Monsoon-driven hydrodynamics are not clearly expressed. They could have developed during the early stage of LMC but subsequently reworked. At the time of sand-spit building, Harmattan-like driven hydrodynamics prevailed and related coastal features were preferentially preserved in the sedimentary record.</description>
<date>2010</date>
</dc>
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