@Article{SantosGarc:2016:CoDuMe,
               author = "Santos, Luiz Fernando dos and Garcia, S{\^a}mia Regina",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Federal de Itajub{\'a} (UNIFEI)}",
                title = "In{\'{\i}}cio e fim da esta{\c{c}}{\~a}o chuvosa no estado de 
                         Minas Gerais: Compara{\c{c}}{\~a}o de duas metodologias 
                         diferentes",
              journal = "Revista Brasileira de Meteorologia",
                 year = "2016",
               volume = "31",
               number = "1",
                pages = "92--104",
                month = "jan./mar.",
             keywords = "Monsoon, Outgoing longwave radiation, Precipitation, Southeast of 
                         Brazil, precipita{\c{c}}{\~a}o, mon{\c{c}}{\~a}o, 
                         radia{\c{c}}{\~a}o onda longa, sudeste do Brasil.",
             abstract = "The Onset and Demise of the rainy season (ONR and DER, 
                         respectively) are found in Minas Gerais (MG) for the 1998-2012 
                         period with two methodologies: one using daily rainfall data and 
                         another that using daily data of antisymmetric equatorially 
                         outgoing longwave radiation (AOLR). The ONR (DER) is indicated by 
                         a sign change from positive-negative (negative-positive) of the 
                         AOLR spatial averages, as in Garcia and Kayano (2009; 2013), 
                         whereas for the Liebmann et al. (2007) method that date is 
                         determined by the minimum (maximum) of the anomalous accumulation 
                         of daily precipitation. For comparison, the daily precipitation 
                         series in the region are also analyzed. The ONR dates found by 
                         both methods are closer to each other compared to the DER, which 
                         has greater variability in both methods. Both methods detect the 
                         ONR and DER dates in MG with quality and the main differences 
                         between them are discussed in the text. It is worth noting that 
                         the Garcia and Kayano (2009; 2013) method is relatively more 
                         advantageous when compared to the method of Liebmann et al. 
                         (2007), because it depends solely on the OLR data, which are 
                         available on near real-time basis, different of the indices based 
                         on precipitation; and also to be independent of the analyzed 
                         period, which is characteristic of the Liebmann et al. (2007) 
                         method. RESUMO: O In{\'{\i}}cio e Fim da Esta{\c{c}}{\~a}o 
                         Chuvosa (IEC e FEC, respectivamente) s{\~a}o encontrados em Minas 
                         Gerais (MG) para 1998-2012 atrav{\'e}s de duas metodologias: uma 
                         que utiliza dados di{\'a}rios de precipita{\c{c}}{\~a}o e outra 
                         que utiliza dados di{\'a}rios de Radia{\c{c}}{\~a}o de Onda 
                         Longa antissim{\'e}trico equatorialmente (ROLant). O IEC (FEC) 
                         {\'e} indicado pela mudan{\c{c}}a de sinal positivo-negativo 
                         (negativo-positivo) das m{\'e}dias espaciais do ROLant, como em 
                         Garcia e Kayano (2009; 2013), e, pelo m{\'e}todo de Liebmann et 
                         al. (2007), determina-se pelo m{\'{\i}}nimo (m{\'a}ximo) da 
                         curva do acumulado das anomalias di{\'a}rias de 
                         precipita{\c{c}}{\~a}o. Para compara{\c{c}}{\~a}o, as 
                         s{\'e}ries de precipita{\c{c}}{\~a}o di{\'a}ria na regi{\~a}o 
                         tamb{\'e}m s{\~a}o analisadas. As datas de IEC encontradas por 
                         ambos os m{\'e}todos s{\~a}o mais pr{\'o}ximas entre si quando 
                         comparadas {\`a}s do FEC, que apresenta maior variabilidade em 
                         ambos os m{\'e}todos. Ambos os m{\'e}todos detectam com 
                         qualidade as datas de IEC e FEC em MG, sendo discutidas suas 
                         principais diferen{\c{c}}as. Cabe ressaltar que o m{\'e}todo de 
                         Garcia e Kayano (2009;2013) {\'e} relativamente mais vantajoso 
                         quando comparado ao de Liebmann et al. (2007), pois utiliza dados 
                         de ROL, dispon{\'{\i}}veis em tempo quase real, diferente dos 
                         {\'{\i}}ndices baseados em precipita{\c{c}}{\~a}o; e, ainda, 
                         por ser independente do per{\'{\i}}odo analisado, 
                         caracter{\'{\i}}stica do m{\'e}todo de Liebmann et al. 
                         (2007).",
                  doi = "10.1590/0102-778620150017",
                  url = "http://dx.doi.org/10.1590/0102-778620150017",
                 issn = "0102-7786",
             language = "pt",
           targetfile = "santos_inicio.pdf",
        urlaccessdate = "28 abr. 2024"
}