@InProceedings{NascimentoAngeHerdSouz:2010:PrBeOv,
               author = "Nascimento, M. G. do and Angelis, Carlos Frederico and Herdies, 
                         Dirceu Luis and Souza, Diego Oliveira de",
          affiliation = "{} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "The precipitation behavior over the la plata basin under influence 
                         of low level jets",
            booktitle = "Abstracts...",
                 year = "2010",
         organization = "The Meeting of the Americas.",
            publisher = "AGU",
             keywords = "climatology, Mesoscale meteorology, precipitation.",
             abstract = "The precipitation, of all meteorological variables, receives great 
                         prominence because of its influence in various areas of human 
                         activity. Therefore the knowledge of the spatial and temporal 
                         variability of precipitation have a fundamental importance for the 
                         development of several research areas. This study describes some 
                         patterns of precipitation over the La Plata Basin during the 
                         occurrence of two types of Low Level Jets (LLJ). Were also 
                         analyzed the contribution of moisture from the Amazon and the 
                         Pantanal on the behavior of precipitation rates over the study 
                         area. For this propose, were used two datasets for the period 
                         2000-2006: (i) estimates of precipitation from 3B42 algorithm on 
                         TRMM, (ii) database of the LLJ occurrence as classified by 
                         Nicolini et al ( 2004), in which the authors using the NCEP 
                         reanalysis and based on the Bonner (1968) criteria classified the 
                         LLJ in the Chaco Jet Events (CJE), for the jets with output region 
                         at latitudes above 25°S, and events of the No Chaco Jets Events 
                         (NCJE), for jets to with output region at latitudes below 25°S. 
                         For a better understanding of the contribution of the LLJ on the 
                         moisture transport between the tropics and extratropics and their 
                         influence on precipitation in the La Plata Basin were also 
                         analyzed the zonal and meridional fluxes of moisture in three 
                         distinct regions: 1) the Amazon region, 2) the Pantanal region and 
                         3) LLJ exit region. The results show the influence of the LLJ's in 
                         accumulated precipitation over the La Plata Basin and the areas 
                         with the highest precipitation rates, related with the output 
                         position of the jets, are according with the classification 
                         proposed by Nicolini et al (2004). Through the balance of moisture 
                         transport on predetermined regions was also observed that the 
                         moisture that reaches the La Plata Basin come from the Amazon and 
                         the Pantanal, directly linked to moisture convergence caused by 
                         LLJ. When analyzing the behavior of the diurnal cycle of 
                         precipitation, were observed that the highest precipitation rates 
                         occurred between 09 and 06 UTC, under the influence of the two 
                         jets. In this context were observed that the highest values of 
                         maximum precipitation occurred at different hour of day, 
                         especially in autumn (SON). Thus, this study showed that the LLJ 
                         are directly linked to the behavior of precipitation over the La 
                         Plata Basin, which are efficient in the moisture transport between 
                         the tropics and extratropics.",
  conference-location = "Foz do Igua{\c{c}}u, BR",
      conference-year = "8-12 aug 2010",
             language = "en",
        urlaccessdate = "18 abr. 2024"
}