@InProceedings{CoutinhoGanRao:2008:MéObQu,
               author = "Coutinho, Michelyne Duarte Leal and Gan, Manoel Alonso and Rao, 
                         Vadlamudi Brahmananda",
                title = "M{\'e}todo objetivo que identifica v{\'o}rtice cicl{\^o}nico em 
                         altos n{\'{\i}}veis na regi{\~a}o tropical",
            booktitle = "Anais...",
                 year = "2008",
         organization = "Congresso Brasileiro de Meteorologia, 15.",
             keywords = "upper-tropospheric cyclonic vortex, tropical region, direct 
                         method, v{\'o}rtice cicl{\^o}nico em altos n{\'{\i}}veis, 
                         regi{\~a}o tropical, m{\'e}todo objetivo.",
             abstract = "Este estudo apresenta um m{\'e}todo objetivo, baseado na 
                         vorticidade relativa, para identificar v{\'o}rtices 
                         cicl{\^o}nicos em altos n{\'{\i}}veis que atuam na regi{\~a}o 
                         tropical. Esses sistemas sin{\'o}ticos s{\~a}o causadores de 
                         totais de precipita{\c{c}}{\~a}o significativos em algumas 
                         {\'a}reas desta regi{\~a}o, como o Nordeste do Brasil, e 
                         apresentam um movimento irregular que tornam as previs{\~o}es de 
                         tempo complexas. A valida{\c{c}}{\~a}o do m{\'e}todo foi feita 
                         para o per{\'{\i}}odo de 2002 a 2006 com dados de 
                         Rean{\'a}lises do National Centers for Environmental 
                         Prediction/National Centers for Atmospheric Research (NCEP/NCAR). 
                         Neste estudo foram mostrados a distribui{\c{c}}{\~a}o espacial 
                         dos casos identificados no ver{\~a}o de 2002-2003, e o 
                         n{\'u}mero de ocorr{\^e}ncia dos v{\'o}rtices obtido pela 
                         valida{\c{c}}{\~a}o do m{\'e}todo e por imagens de 
                         sat{\'e}lite no canal do vapor d{\'a}gua, fornecidas pela 
                         Divis{\~a}o de sat{\'e}lite Ambiental (DAS) do Centro de 
                         Previs{\~a}o de Tempo e Estudos Clim{\'a}ticos (CPTEC/INPE). Os 
                         resultados mostraram bom desempenho do m{\'e}todo em identificar 
                         algumas caracter{\'{\i}}sticas dos sistemas, como: n{\'u}mero 
                         de ocorr{\^e}ncia, posicionamento, deslocamento e regi{\~a}o de 
                         forma{\c{c}}{\~a}o, embora tenham identificado um caso a mais em 
                         alguns anos do per{\'{\i}}odo em estudo. As imagens de 
                         sat{\'e}lite identificaram um n{\'u}mero de v{\'o}rtices 
                         inferior em todos os anos, embora com pequena diferen{\c{c}}a. 
                         ABSTRACT: This study develops a objetive method based in relative 
                         vorticity to identify the upper-tropospheric cyclonic vortices 
                         that form in the tropical region. Significant total precipitation 
                         is provoked by this synoptic system in some areas of this region, 
                         as the notheast Brazil. This system shows a irregular moviment 
                         becaming complex the wheather forecasts. The objetive method 
                         validation was made using Reanalysis data from the National 
                         Centers for Environmental Prediction/National Center for 
                         Atmospheric Research (NCEP/NCAR) from 2002 to 2006. In this study 
                         we showed just the spatial distribution of events that was 
                         identified during the summer 2002-2003, beside the vortex number 
                         ocorrence identified by the method and the water vapour channel 
                         satellite pictures provided by Divis{\~a}o de sat{\'e}lite 
                         Ambiental (DSA) of Centro de Previs{\~a}o de Tempo e Estudos 
                         Clim{\'a}ticos (CPTEC/INPE). The results showed that the method 
                         performace has a good skill to identify some characterists of this 
                         system as: ocorrence number, position, displecement and formation 
                         region, although one more event was identified in some years by 
                         the objetive method. In the satellite pictures was identificated a 
                         lower number of vortices in every years.",
  conference-location = "S{\~a}o Paulo",
      conference-year = "24-29 ago",
           copyholder = "SID/SCD",
             language = "pt",
         organisation = "SBMET",
           targetfile = "Michelyne_m{\'e}todo.pdf",
        urlaccessdate = "02 maio 2024"
}