Variabilité basse-fréquence des précipitations au Sahel et des températures de surface de l'océan Atlantique au cours du dernier siècle.
Identifieur interne : 000794 ( Hal/Corpus ); précédent : 000793; suivant : 000795Variabilité basse-fréquence des précipitations au Sahel et des températures de surface de l'océan Atlantique au cours du dernier siècle.
Auteurs : B. Dieppois ; A. Durand ; M. Fournier ; A. Diedhiou ; Bernard Fontaine ; N. Massei ; Z. Nouaceur ; D. SebagSource :
Descripteurs français
Abstract
Cette étude examine les téléconnexions entre les températures de surface de la mer (TSM) de l'océan Atlantique et la distribution zonale des précipitations au Sahel au cours du dernier siècle. Depuis la fin des années 60, les précipitations d'Afrique de l'Ouest présentent une tendance négative sur l'ensemble de la bande sahélienne. Pourtant, trois types de variabilité basse-fréquence des précipitations sahélienne sont observés : la côte atlantique (Dakar), le Sahel central (Nioro du Sahel et Mopti) et le Sahel oriental (Niamey, Maradi, Maïné-Soroa). Au cours du XXème siècle, les précipitations sont rarement reliées simultanément avec les TSM de l'Atlantique Nord et Tropical Sud. Aux échelles multi- et quasi-décennale, dans les années 50 et depuis les années 90, un réchauffement des TSM de l'Atlantique Nord (AMO+ : Atlantic Multidecadal Oscillation) contribue à l'augmentation des précipitations sahéliennes de la côte Atlantique à Mopti ou Niamey (6°W/2°E). L'impact des TSM de l'Atlantique Tropical Sud dépend de la période d'observation et de l'échelle de variabilité.
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6 boulevard Gabriel - 21000 Dijon</addrLine><country key="FR"></country></address><ref type="url">http://biogeosciences.u-bourgogne.fr/</ref></desc><listRelation><relation active="#struct-300270" type="direct"></relation><relation name="UMR6282" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-300270" type="direct"><org type="institution" xml:id="struct-300270" status="VALID"><orgName>Université de Bourgogne</orgName><orgName type="acronym">UB</orgName><desc><address><addrLine>Maison de l'université - Esplanade Érasme - BP 27877 - 21078 Dijon cedex</addrLine><country key="FR"></country></address><ref type="url">http://www.u-bourgogne.fr/</ref></desc></org></tutelle><tutelle name="UMR6282" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation></affiliation></author><author><name sortKey="Massei, N" sort="Massei, N" uniqKey="Massei N" first="N." last="Massei">N. 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Sebag</name><affiliation><hal:affiliation type="laboratory" xml:id="struct-847" status="VALID"><orgName>Morphodynamique continentale et côtière</orgName><orgName type="acronym">MCC</orgName><desc><address><addrLine>24 Rue des tilleuls 14000 CAEN</addrLine><country key="FR"></country></address><ref type="url">http://WWW.geos.unicaen.fr</ref></desc><listRelation><relation active="#struct-300045" type="direct"></relation><relation active="#struct-300266" type="direct"></relation><relation active="#struct-300318" type="direct"></relation><relation name="UMR6143" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID"><orgName>INSU</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300266" type="direct"><org type="institution" xml:id="struct-300266" status="INCOMING"><orgName>Université de Caen Basse-Normandie</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300318" type="direct"><org type="institution" xml:id="struct-300318" status="VALID"><orgName>Université de Rouen</orgName><desc><address><addrLine> 1 rue Thomas Becket - 76821 Mont-Saint-Aignan</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-rouen.fr/</ref></desc></org></tutelle><tutelle name="UMR6143" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation></affiliation></author></analytic></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="fr"><term>Sahel</term><term>TSM Atlantique</term><term>précipitations</term><term>téléconnexions</term><term>variabilité climatique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="fr">Cette étude examine les téléconnexions entre les températures de surface de la mer (TSM) de l'océan Atlantique et la distribution zonale des précipitations au Sahel au cours du dernier siècle. Depuis la fin des années 60, les précipitations d'Afrique de l'Ouest présentent une tendance négative sur l'ensemble de la bande sahélienne. Pourtant, trois types de variabilité basse-fréquence des précipitations sahélienne sont observés : la côte atlantique (Dakar), le Sahel central (Nioro du Sahel et Mopti) et le Sahel oriental (Niamey, Maradi, Maïné-Soroa). Au cours du XXème siècle, les précipitations sont rarement reliées simultanément avec les TSM de l'Atlantique Nord et Tropical Sud. Aux échelles multi- et quasi-décennale, dans les années 50 et depuis les années 90, un réchauffement des TSM de l'Atlantique Nord (AMO+ : Atlantic Multidecadal Oscillation) contribue à l'augmentation des précipitations sahéliennes de la côte Atlantique à Mopti ou Niamey (6°W/2°E). L'impact des TSM de l'Atlantique Tropical Sud dépend de la période d'observation et de l'échelle de variabilité.</div></front></TEI><hal api="V3"><titleStmt><title xml:lang="fr">Variabilité basse-fréquence des précipitations au Sahel et des températures de surface de l'océan Atlantique au cours du dernier siècle.</title><author role="aut"><persName><forename type="first">B.</forename><surname>Dieppois</surname></persName><email></email><idno type="halauthor">1152407</idno><affiliation ref="#struct-847"></affiliation></author><author role="aut"><persName><forename type="first">A.</forename><surname>Durand</surname></persName><email></email><idno type="halauthor">23605</idno><affiliation ref="#struct-847"></affiliation></author><author role="aut"><persName><forename type="first">M.</forename><surname>Fournier</surname></persName><email></email><idno type="halauthor">54849</idno><affiliation ref="#struct-847"></affiliation></author><author role="aut"><persName><forename type="first">A.</forename><surname>Diedhiou</surname></persName><email></email><idno type="halauthor">188632</idno><affiliation ref="#struct-732"></affiliation></author><author role="aut"><persName><forename type="first">Bernard</forename><surname>Fontaine</surname></persName><email></email><idno type="halauthor">102849</idno><affiliation ref="#struct-182913"></affiliation></author><author role="aut"><persName><forename type="first">N.</forename><surname>Massei</surname></persName><email></email><idno type="halauthor">360509</idno><affiliation ref="#struct-847"></affiliation></author><author role="aut"><persName><forename type="first">Z.</forename><surname>Nouaceur</surname></persName><email></email><idno type="halauthor">1152408</idno><affiliation ref="#struct-97036"></affiliation></author><author role="aut"><persName><forename type="first">D.</forename><surname>Sebag</surname></persName><email></email><idno type="halauthor">360510</idno><affiliation ref="#struct-847"></affiliation><affiliation ref="#struct-114"></affiliation></author><editor role="depositor"><persName><forename>Rémi</forename><surname>Laffont</surname></persName><email>Remi.Laffont@u-bourgogne.fr</email></editor></titleStmt><editionStmt><edition n="v1" type="current"><date type="whenSubmitted">2012-11-27 09:39:10</date><date type="whenModified">2015-12-22 16:22:21</date><date type="whenReleased">2012-11-27 09:39:10</date><date type="whenProduced">2012-09-05</date></edition><respStmt><resp>contributor</resp><name key="119222"><persName><forename>Rémi</forename><surname>Laffont</surname></persName><email>Remi.Laffont@u-bourgogne.fr</email></name></respStmt></editionStmt><publicationStmt><distributor>CCSD</distributor><idno type="halId">hal-00757465</idno><idno type="halUri">https://hal.archives-ouvertes.fr/hal-00757465</idno><idno type="halBibtex">dieppois:hal-00757465</idno><idno type="halRefHtml">S. Bigot & S. Rome. 25ème colloque de l'Association Internationale de Climatologie, Sep 2012, Grenoble, France. Association Internationale de Climatologie, pp.219-224, 2012</idno><idno type="halRef">S. Bigot & S. Rome. 25ème colloque de l'Association Internationale de Climatologie, Sep 2012, Grenoble, France. Association Internationale de Climatologie, pp.219-224, 2012</idno></publicationStmt><seriesStmt><idno type="stamp" n="BD_CRC" p="BD">CRC</idno><idno type="stamp" n="BD" p="UNIV-BOURGOGNE">Biogéosciences-Dijon</idno><idno type="stamp" n="UNIV-BOURGOGNE">Université de Bourgogne</idno><idno type="stamp" n="CNRS">CNRS - Centre national de la recherche scientifique</idno><idno type="stamp" n="UNIV-GRENOBLE1" p="UGA">Université Joseph Fourier - Grenoble I</idno><idno type="stamp" n="UNIV-CAEN">Université de Caen</idno><idno type="stamp" n="UNIV-LEHAVRE">Université du Havre</idno><idno type="stamp" n="UNIV-ROUEN">Université de Rouen</idno><idno type="stamp" n="INSU">INSU - Institut National des Sciences de l'Univers</idno><idno type="stamp" n="OSUG" p="UGA">Observatoire des Sciences de la Terre, de l'Univers et de l'Environnement de Grenoble</idno><idno type="stamp" n="SDE">Sciences De l'Environnement</idno><idno type="stamp" n="HSM">Hydrosciences Montpellier</idno><idno type="stamp" n="LTHE" p="UGA">Laboratoire d'étude des transferts en hydrologie et environnement</idno><idno type="stamp" n="GIP-BE">GIP Bretagne Environnement</idno><idno type="stamp" n="INPG" p="UGA">Institut polytechnique de Grenoble</idno><idno type="stamp" n="UGA">HAL Grenoble Alpes</idno><idno type="stamp" n="UMR6143M2C">productions UMR 6143</idno><idno type="stamp" n="COMUE-NORMANDIE">Normandie Université</idno><idno type="stamp" n="AGROPOLIS">Agropolis</idno></seriesStmt><notesStmt><note type="commentary">6 pages</note><note type="audience" n="2">International</note><note type="invited" n="0">No</note><note type="popular" n="0">No</note><note type="peer" n="1">Yes</note><note type="proceedings" n="1">Yes</note></notesStmt><sourceDesc><biblStruct><analytic><title xml:lang="fr">Variabilité basse-fréquence des précipitations au Sahel et des températures de surface de l'océan Atlantique au cours du dernier siècle.</title><author role="aut"><persName><forename type="first">B.</forename><surname>Dieppois</surname></persName><idno type="halAuthorId">1152407</idno><affiliation ref="#struct-847"></affiliation></author><author role="aut"><persName><forename type="first">A.</forename><surname>Durand</surname></persName><idno type="halAuthorId">23605</idno><affiliation ref="#struct-847"></affiliation></author><author role="aut"><persName><forename type="first">M.</forename><surname>Fournier</surname></persName><idno type="halAuthorId">54849</idno><affiliation ref="#struct-847"></affiliation></author><author role="aut"><persName><forename type="first">A.</forename><surname>Diedhiou</surname></persName><idno type="halAuthorId">188632</idno><affiliation ref="#struct-732"></affiliation></author><author role="aut"><persName><forename type="first">Bernard</forename><surname>Fontaine</surname></persName><idno type="halAuthorId">102849</idno><affiliation ref="#struct-182913"></affiliation></author><author role="aut"><persName><forename type="first">N.</forename><surname>Massei</surname></persName><idno type="halAuthorId">360509</idno><affiliation ref="#struct-847"></affiliation></author><author role="aut"><persName><forename type="first">Z.</forename><surname>Nouaceur</surname></persName><idno type="halAuthorId">1152408</idno><affiliation ref="#struct-97036"></affiliation></author><author role="aut"><persName><forename type="first">D.</forename><surname>Sebag</surname></persName><idno type="halAuthorId">360510</idno><affiliation ref="#struct-847"></affiliation><affiliation ref="#struct-114"></affiliation></author></analytic><monogr><meeting><title>25ème colloque de l'Association Internationale de Climatologie</title><date type="start">2012-09-05</date><date type="end">2012-09-08</date><settlement>Grenoble</settlement><country key="FR">France</country></meeting><editor>S. Bigot & S. Rome</editor><imprint><publisher>Association Internationale de Climatologie</publisher><biblScope unit="pp">219-224</biblScope><date type="datePub">2012</date></imprint></monogr></biblStruct></sourceDesc><profileDesc><langUsage><language ident="fr">French</language></langUsage><textClass><keywords scheme="author"><term xml:lang="fr">TSM Atlantique</term><term xml:lang="fr">téléconnexions</term><term xml:lang="fr">variabilité climatique</term><term xml:lang="fr">précipitations</term><term xml:lang="fr">Sahel</term></keywords><classCode scheme="halDomain" n="sdu.stu.cl">Sciences of the Universe [physics]/Earth Sciences/Climatology</classCode><classCode scheme="halDomain" n="sde.mcg">Environmental Sciences/Global Changes</classCode><classCode scheme="halTypology" n="COMM">Conference papers</classCode></textClass><abstract xml:lang="fr">Cette étude examine les téléconnexions entre les températures de surface de la mer (TSM) de l'océan Atlantique et la distribution zonale des précipitations au Sahel au cours du dernier siècle. Depuis la fin des années 60, les précipitations d'Afrique de l'Ouest présentent une tendance négative sur l'ensemble de la bande sahélienne. Pourtant, trois types de variabilité basse-fréquence des précipitations sahélienne sont observés : la côte atlantique (Dakar), le Sahel central (Nioro du Sahel et Mopti) et le Sahel oriental (Niamey, Maradi, Maïné-Soroa). Au cours du XXème siècle, les précipitations sont rarement reliées simultanément avec les TSM de l'Atlantique Nord et Tropical Sud. Aux échelles multi- et quasi-décennale, dans les années 50 et depuis les années 90, un réchauffement des TSM de l'Atlantique Nord (AMO+ : Atlantic Multidecadal Oscillation) contribue à l'augmentation des précipitations sahéliennes de la côte Atlantique à Mopti ou Niamey (6°W/2°E). L'impact des TSM de l'Atlantique Tropical Sud dépend de la période d'observation et de l'échelle de variabilité.</abstract></profileDesc></hal></record>Pour manipuler ce document sous Unix (Dilib)
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