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@InProceedings{FerreiraAndr:2013:CaEsCa,
               author = "Ferreira, Nelson Jesuz and Andr{\'e}, Iara Regina Nocentini",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Caracter{\'{\i}}sticas espaciais do campo de 
                         radia{\c{c}}{\~a}o de ondas longas emergentes sobre a 
                         Am{\'e}rica do Sul e vizinhan{\c{c}}as/ Spatial features of the 
                         outgoing longwave radiation field over South America and 
                         vicinities",
            booktitle = "Anais...",
                 year = "2013",
         organization = "Simp{\'o}sio Internacional de Climatologia, 5. (SIC).",
             keywords = "wavelets, OLR.",
             abstract = "RESUMO: Este trabalho analisa a variabilidade espacial do campo de 
                         radia{\c{c}}{\~a}o de ondas longas emergentes (ROL) sobre a 
                         Am{\'e}rica do Sul e oceanos vizinhos. Foram utilizados dados 
                         di{\'a}rios de ROL interpolados em pontos de grade, 
                         per{\'{\i}}odo de 1979 a 2012, disponibilizados pelo National 
                         Centers for Environmental Prediction (NCEP). A metodologia 
                         utilizada envolve an{\'a}lise espectral e filtragens por meio da 
                         transformada de ondeletas. Neste contexto, analisaram-se os campos 
                         m{\'e}dio do desvio padr{\~a}o de ROL nas escalas sin{\'o}tica, 
                         submensal e intrasazonal. No primeiro caso observa-se que o desvio 
                         padr{\~a}o de ROL {\'e} significativo (m{\'a}ximo de 33 W/m2) 
                         no sul Brasil, associado com a passagem de sistemas frontais, e 
                         tamb{\'e}m ao longo da Zona de Converg{\^e}ncia Intertropical. 
                         Em geral a variabilidade observada de ROL na escala submensal 
                         (at{\'e} 20 Watts/m2) {\'e} menor do que a da escala 
                         sin{\'o}tica, caracterizando-se por uma ampla banda com 
                         orienta{\c{c}}{\~a}o noroeste-sudeste afetando as regi{\~o}es 
                         sul, sudeste e centro oeste do Brasil. Na escala intrasazonal a 
                         variabilidade {\'e} mais acentuada (at{\'e} 14 Watts/m2) ao 
                         longo da Zona de Converg{\^e}ncia do Atl{\^a}ntico Sul e em 
                         parte do nordeste brasileiro; no oceano Atl{\^a}ntico Equatorial 
                         o desvio padr{\~a}o de ROL {\'e} muito maior na escala 
                         sin{\'o}tica (at{\'e} 27 Watts/m2), sendo seguido pelas escalas 
                         submensal (at{\'e} 16 Watts/m2) e intrasazonal (at{\'e} 12 
                         Watts/m2). ABSTRACT: This work deals with the spatial variability 
                         of the outgoing longwave radiation (OLR) data over South America 
                         and vicinities. The data basis for this study consists of daily 
                         gridded OLR for the 1979 to 2011 period, made available by the 
                         National Centers for Environmental Prediction (NCEP). The employed 
                         methodology applies spectral analysis and filtering data with the 
                         wavelet transform. In this sense, mean standard deviation (SD) 
                         spatial fields of OLR were analyzed focusing the synoptic, 
                         submonthy and intraseasonal time scales. In the first case, 
                         significant OLR SD (values up to 33 W/m2) were observed over 
                         southern Brazil along the frontal systems tracks and also along 
                         the Inter Tropical Convergence Zone. In general the observed 
                         variability of OLR (values up to 20 Watts/m2) in the submonthly 
                         time scale is smaller than the observed one in the synoptic scale, 
                         being characterized by a broad band of OLR stretching northwest to 
                         southwestern Atlantic Ocean from midwest Brazil. A noteworthy 
                         feature of the SD field in the intraseasonal time scale occurs 
                         along the South Atlantic Convergence Zone (values up 14 Watts/m2) 
                         and in portions of the northeast Brazil In the Equatorial Atlantic 
                         Ocean the observed SD of OLR is significant in the synoptic scale 
                         (values up to 27 Watts/m2) followed by the submontly (values up to 
                         16 Watts/m2) and intraseasonal scales (values up to 12 
                         Watts/m2).",
  conference-location = "Florian{\'o}polis, SC",
      conference-year = "15-19, set.",
        urlaccessdate = "15 jan. 2021"
}


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