@Article{LimaSatyReye:2010:LaAtCo,
               author = "Lima, Kellen Carla and Satyamurty, Prakki and Reyes Fernandez, 
                         Julio Pablo",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Large-scale atmospheric conditions associated with heavy rainfall 
                         episodes in Southeast Brazil",
              journal = "Theoretical and Applied Climatology",
                 year = "2010",
               volume = "101",
               number = "1-2",
                pages = "121--131",
                month = "July",
             keywords = "THEORETICAL AND APPLIED CLIMATOLOGY.",
             abstract = "Heavy rainfall events in austral summer are responsible for almost 
                         all the natural disasters in Southeast Brazil. They are mostly 
                         associated with two types of atmospheric perturbations: Cold Front 
                         (53%) and the South Atlantic Convergence Zone (47%). The important 
                         question of what synoptic characteristics distinguish a heavy 
                         rainfall event (HRE) from a normal rainfall event (NRE) is 
                         addressed in this study. Here, the evolutions of such 
                         characteristics are identified through the anomalies with respect 
                         to climatology of the composite fields of atmospheric variables. 
                         The anomalies associated with HRE are significantly more intense 
                         than those associated with NRE in all fundamental atmospheric 
                         variables such as outgoing long-wave radiation, sea-level 
                         pressure, 500-hPa geopotential, lower and upper tropospheric 
                         winds. The moisture flux convergence over Southeast Brazil in the 
                         HRE composites is 60% larger than in the NRE composites. The 
                         energetics calculations for the HRE that occurred in the beginning 
                         of February 1988 strongly suggest that the barotropic instability 
                         played an important role in the intensification of the 
                         perturbation. These results, especially the intensities of the 
                         wind, pressure anomalies, and the moisture convergence are useful 
                         for the meteorologists of the Southeast Brazil for forecasting 
                         heavy precipitation.",
                  doi = "10.1007/s00704-009-0207-9",
                  url = "http://dx.doi.org/10.1007/s00704-009-0207-9",
                 issn = "0177-798X",
             language = "en",
        urlaccessdate = "02 maio 2024"
}