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		<doi>10.1155/2012/369567</doi>
		<issn>1687-9309</issn>
		<label>lattes: 5379515759830546 3 KouadioServMachLent:2012:HeRaEp</label>
		<citationkey>KouadioServMachLent:2012:HeRaEp</citationkey>
		<title>Heavy Rainfall Episodes in the Eastern Northeast Brazil Linked to Large-Scale Ocean-Atmosphere Conditions in the Tropical Atlantic</title>
		<project>French-Brazilian IRD-CNPq Project "Climate of the Tropical Atlantic and Impacts on the Northeast" (CATIN)   CNPq Process 492690/2004-9  FINEP   FINEP Process 01080617/00  French Institut de Recherche pour le Developpement (IRD)    FUNCAP   BPV-0025-00055.01.00/11  CNPq  478480/2009-1  478398/2006-9</project>
		<year>2012</year>
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		<author>Kouadio, Yves K.,</author>
		<author>Servain, Jacques,</author>
		<author>Machado, Luiz Augusto Toledo,</author>
		<author>Lentini, Carlos A. D.,</author>
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		<affiliation>Laboratoire de Physique de l’Atmosphère (LPA), UFR-SSMT, Université de Cocody, 22 BP 582, Abidjan 22,  Cote D'Ivoire</affiliation>
		<affiliation>Fundação Cearense de Meteorologia e Recursos Hídricos (FUNCEME), Avenida Rui Barbosa 1246, Aldeota, 60115-221 Fortaleza, CE,  Brazil; Institut de Recherche pour le Développement (IRD), UMR182-LOCEAN, Université de Paris VI, 4 Place Jussieu, 75252 Paris,  France</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto de Fisica, Departamento de Fisica da Terra e do Meio Ambiente, Universidade Federal da Bahia (UFBA), Travessa Barão de Jeremoabo, s/n, Campus Ondina, 40170-280 Salvador, BA,  Brazil</affiliation>
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		<electronicmailaddress>machado@cptec.inpe.br</electronicmailaddress>
		<e-mailaddress>machado@cptec.inpe.br</e-mailaddress>
		<journal>Advances in Meteorology</journal>
		<volume>2012</volume>
		<number>Article ID 369567</number>
		<pages>1-16</pages>
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		<abstract>Relationships between simultaneous occurrences of distinctive atmospheric easterly wave (EW) signatures that cross the south-equatorial Atlantic, intense mesoscale convective systems (lifespan > 2 hour) that propagate westward over the western south-equatorial Atlantic, and subsequent strong rainfall episodes (anomaly > 10&#8201;mm·day&#8722;1) that occur in eastern Northeast Brazil (ENEB) are investigated. Using a simple diagnostic analysis, twelve cases with EW lifespan ranging between 3 and 8 days and a mean velocity of 8&#8201;m·s&#8722;1 were selected and documented during each rainy season of 2004, 2005, and 2006. These cases, which represent 50% of the total number of strong rainfall episodes and 60% of the rainfall amount over the ENEB, were concomitant with an acceleration of the trade winds over the south-equatorial Atlantic, an excess of moisture transported westward from Africa to America, and a strengthening of the convective activity in the oceanic region close to Brazil. Most of these episodes occurred during positive sea surface temperature anomaly patterns over the entire south-equatorial Atlantic and low-frequency warm conditions within the oceanic mixing layer. A real-time monitoring and the simulation of this ocean-atmosphere relationship could help in forecasting such dramatic rainfall events.</abstract>
		<area>MET</area>
		<language>en</language>
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