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@Article{AraújoAndCanKaySou:2013:InEvEl,
               author = "Ara{\'u}jo, Rosimeire Gonzalez and Andreoli, Rita Val{\'e}ria 
                         and Candido, Luiz Antonio and Kayano, Mary Toshie and Souza, 
                         Rodrigo Augusto Ferreira de",
          affiliation = "Av. Andr{\'e} Ara{\'u}jo, 2936, Campus II, Aleixo, 69060-001, 
                         Manaus, AM, Brazil and Universidade do Estado do Amazonas, Escola 
                         Superior de Tecnologia, Coordena{\c{c}}{\~a}o de Meteorologia, 
                         Av. Darcy Vargas, 1200, Parque 10 de Novembro, 69065-020, Manaus, 
                         AM, Brazil and {Instituto Nacional de Pesquisas da Amaz{\^o}nia 
                         (INPA)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         Universidade do Estado do Amazonas, Escola Superior de Tecnologia, 
                         Coordena{\c{c}}{\~a}o de Meteorologia, Av. Darcy Vargas, 1200, 
                         Parque 10 de Novembro, 69065-020, Manaus, AM, Brazil",
                title = "A influ{\^e}ncia do evento El Niño – Oscila{\c{c}}{\~a}o Sul e 
                         Atl{\^a}ntico Equatorial na precipita{\c{c}}{\~a}o sobre as 
                         regi{\~o}es norte e nordeste da Am{\'e}rica do Sul / Influence 
                         of EI Niño-Southern oscillation and equatorial Atlantic on 
                         rainfall over northern and northeastern regions of South America",
              journal = "Acta Amazonica",
                 year = "2013",
               volume = "43",
               number = "4",
                pages = "469--480",
             keywords = "EI Niño - Southern Oscillation, Atlantic Equatorial Mode (AEM), 
                         Pacific Ocean.",
             abstract = "Os impactos de eventos an{\^o}malos no oceano Pac{\'{\i}}fico 
                         associados ao El Niño-Oscila{\c{c}}{\~a}o Sul (ENOS) na 
                         precipita{\c{c}}{\~a}o da regi{\~a}o norte e nordeste da 
                         Am{\'e}rica do Sul foram avaliados para o per{\'{\i}}odo de 
                         1900 a 2007, fazendo-se uso de an{\'a}lise de 
                         composi{\c{c}}{\~o}es. Os eventos El Niño (La Niña) no 
                         Pac{\'{\i}}fico que juntamente com um Modo Equatorial no 
                         Atl{\^a}ntico (MEA) frio (quente) formam um gradiente interbacias 
                         entre o Pac{\'{\i}}fico e Atl{\^a}ntico foram analisados 
                         considerando, separadamente, aqueles para os quais o gradiente se 
                         forma na fase inicial do ENOS daqueles em que o gradiente se forma 
                         na fase de decaimento do ENOS. Os resultados mostram que o 
                         padr{\~a}o de precipita{\c{c}}{\~a}o na regi{\~a}o norte e 
                         nordeste da Am{\'e}rica do Sul {\'e} refor{\c{c}}ado mediante a 
                         configura{\c{c}}{\~a}o do gradiente interbacias durante a fase 
                         inicial do ENOS. Nesse caso, uma poss{\'{\i}}vel 
                         explica{\c{c}}{\~a}o {\'e} que o MEA de sinal contr{\'a}rio ao 
                         ENOS durante sua fase inicial cria condi{\c{c}}{\~o}es 
                         favor{\'a}veis para o desenvolvimento de um gradiente 
                         inter-hemisf{\'e}rico no Atl{\^a}ntico Tropical atuando no mesmo 
                         sentido do gradiente interbacias, e colaborando para fortalecer o 
                         efeito do El Niño (La Niña) na precipita{\c{c}}{\~a}o. Por outro 
                         lado, para os eventos ENOS em que o gradiente se forma em sua fase 
                         de decaimento, o impacto na precipita{\c{c}}{\~a}o {\'e} mais 
                         significativo na regi{\~a}o norte e centro-oeste da bacia. Uma 
                         poss{\'{\i}}vel explica{\c{c}}{\~a}o para essas 
                         diferen{\c{c}}as est{\'a} associada {\`a}s mudan{\c{c}}as que 
                         ocorrem na circula{\c{c}}{\~a}o atmosf{\'e}rica leste-oeste 
                         associada ao gradiente lesteoeste de anomalias da TSM. Os 
                         resultados deste estudo podem ser {\'u}teis, principalmente, para 
                         fins de monitoramento clim{\'a}tico. ABSTRACT: The impacts of 
                         anomalous events in the Pacific Ocean associated with the El Niño 
                         - Southern Oscillation (ENSO) on rainfall over northern and 
                         northeastern regions of South America were evaluated for the 
                         period from 1900 to 2007 using composite analyses. The El Niño (La 
                         Niña) events in the Pacific, that together with a cold (warm) 
                         Atlantic Equatorial Mode (AEM) form an interbasin gradient between 
                         the Pacific and Atlantic were analyzed considering separately 
                         those for which the gradient forms during the ENSO onset phase 
                         from those for which the gradient forms during the ENSO demise 
                         phase. The results show that the rainfall pattern over the 
                         northern and northeastern region of South America is reinforced 
                         under an interbasin gradient during the initial phase of the ENSO 
                         event. In this case, a possible explanation is that the AEM with 
                         opposite sign of the ENSO event in its onset stage creates 
                         favorable conditions for the development of an interhemispheric 
                         gradient in the Tropical Atlantic acting in the same direction of 
                         the interbasin gradient, and collaborating to reinforce the El 
                         Niño (La Niña) effect on the precipitation. On the other hand, for 
                         ENSO events for which the interbasin gradient forms in the demise 
                         stage, the impact on the precipitation is more significative in 
                         the northern and central-western regions of the basin. A possible 
                         explanation for these differences is linked to the alterations in 
                         the east-west atmospheric circulation associated with the 
                         east-west gradient of the SST anomalies. The result of this study 
                         might be useful mainly for climate monitoring purposes.",
                  doi = "10.1590/S0044-59672013000400009",
                  url = "http://dx.doi.org/10.1590/S0044-59672013000400009",
                 issn = "0044-5967",
                label = "scopus 2013-11",
             language = "pt",
           targetfile = "09.pdf",
        urlaccessdate = "14 ago. 2020"
}


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