@InProceedings{NegriMachBord:2010:ToDeIn,
               author = "Negri, Renato Galante and Machado, Luiz Augusto Toledo and Borde, 
                         R{\'e}gis",
          affiliation = "{} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "A tool to detect inner cloud top dynamics of deep convective 
                         system",
                 year = "2010",
         organization = "International Winds Workshop, 10.",
             abstract = "The knowledge of deep convective system formation process is a key 
                         feature in climate change and nowcasting. However the inner flows 
                         at the top of deep convection towers are not well understood due 
                         to several uncertainties linked to the dynamic itself. The new 
                         technique described in this study had been developed to extract 
                         concrete information about such features. This could help 
                         clarifying ring and U/V structures in deep convection and be 
                         potentially useful in nowcasting application. Indeed, the use of 
                         high resolution NWP models, which now include explicit 
                         microphysical processes, requires data assimilation at very high 
                         resolution as well. An usual atmospheric motion vector tracking 
                         algorithm has been applied to pair of images composed by 
                         combinations of Spinning Enhanced Visible and Infra-red Imager 
                         (SEVIRI) infra-red channels. Several ranges of channel differences 
                         were used in the tracking process, such intervals being expected 
                         to correspond to specific cloud top microphysics structures. 
                         Various consistent flows of motion vectors with different speeds 
                         and/or directions have been extracted at the same location 
                         depending on the channel difference intervals used. These 
                         differences in speeds/directions can illustrate local wind shear 
                         situations, or correspond to expansion or dissipation of cloud 
                         regions that contain specific kind of ice crystals or droplets. 
                         Comparisons of the results against European Centre for 
                         Medium-Range Weather Forecasts (ECMWF) forecast profiles allowed 
                         identifying situations for which the direction and speed 
                         differences describe wind shear situations. A comparison with 
                         radar measurements from Cloudsat project was done to correlate 
                         wind shear situations to vertical cloud structures.",
  conference-location = "Tokyo, Japan",
      conference-year = "fev. 22-26",
             language = "en",
         organisation = "Japan Meteorological Agency",
           targetfile = "10hIWW-Tokyo-Negri-Machado-Borde-2.pdf",
        urlaccessdate = "03 maio 2024"
}