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dc.contributor.authorAndreoli, Rita Valéria-
dc.contributor.authorOliveira, Suzana Soares de-
dc.contributor.authorKayano, Mary Toshie-
dc.contributor.authorViegas, Juarez-
dc.contributor.authorSouza, Rodrigo Augusto Ferreira de-
dc.contributor.authorCândido, Luiz Antônio-
dc.date.accessioned2020-06-15T21:39:18Z-
dc.date.available2020-06-15T21:39:18Z-
dc.date.issued2017-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/17142-
dc.description.abstractThe impacts of El Niño (EN) on the rainfall over South America are investigated considering three EN types differing in the locations of the maximum sea surface temperature (SST) anomalies in the equatorial Pacific: the Central-Pacific (CP), Eastern-Pacific (EP) and the Mixed (MIX) types. The largest positive (SST) anomalies for the EP and CP types occur, respectively, in the eastern and central sectors of the tropical Pacific during all seasons. The SST anomaly pattern for the MIX-EN resembles that of the EP–EN during its onset stage, and of the CP–EN during its mature and demise stages. The different SST anomaly patterns affect the large-scale (Walker circulation and the tropospheric Rossby-wave trains) and local (South American low-level jet – SALLJ) atmospheric circulation patterns in different ways and lead to distinct precipitation anomaly patterns over South America. Variations in the position and longitudinal extension of the downward motions of the EN-related eastward-displaced Walker circulation explain the differences in the dryness over equatorial South America. For the CP–EN, a double Walker cell defines a more zonal configuration of the equatorial dryness over South America during the first three analysed seasons. This feature is not noted for the other two EN types. The Rossby-wave train pattern path depends on the EN types and seasons. In consequence, the associated local atmospheric circulation patterns depend also on the season and EN types. In all seasons, an intense SALLJ for the EP EN contrasts with weak or inexistence SALLJ for the other two EN types. Thus, a wetter condition over southeastern South America, southern and eastern Brazil occurs for the EP EN in relation to the other EN types. The results shown here, in particular considering the MIX EN type, have not been discussed before and might be useful mainly for climate monitoring purposes. © 2016 Royal Meteorological Societyen
dc.language.isoenpt_BR
dc.relation.ispartofVolume 37, Número 3, Pags. 1374-1390pt_BR
dc.rightsRestrito*
dc.subjectAtmospheric Movementsen
dc.subjectAtmospheric Pressureen
dc.subjectAtmospheric Temperatureen
dc.subjectClimate Changeen
dc.subjectClimatologyen
dc.subjectMechanical Wavesen
dc.subjectMeteorologyen
dc.subjectNickelen
dc.subjectPrecipitation (chemical)en
dc.subjectRainen
dc.subjectSurface Watersen
dc.subjectAtmospheric Circulation Patternsen
dc.subjectEquatorial Pacificen
dc.subjectLongitudinal Extensionen
dc.subjectPrecipitation Anomaliesen
dc.subjectSea Surface Temperature Anomaliesen
dc.subjectSouth Americaen
dc.subjectSoutheastern South Americaen
dc.subjectSouthern Oscillationen
dc.subjectOceanographyen
dc.subjectAtmospheric Circulationen
dc.subjectEl Ninoen
dc.subjectPrecipitation (climatology)en
dc.subjectRainfallen
dc.subjectRossby Waveen
dc.subjectSea Surface Temperatureen
dc.subjectPacific Oceanen
dc.subjectPacific Ocean (central)en
dc.subjectPacific Ocean (east)en
dc.subjectPacific Ocean (equatorial)en
dc.subjectPacific Ocean (tropical)en
dc.subjectSouth Americaen
dc.titleThe influence of different El Niño types on the South American rainfallen
dc.typeArtigopt_BR
dc.identifier.doi10.1002/joc.4783-
dc.publisher.journalInternational Journal of Climatologypt_BR
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