author = "Ricarte, Rita Micheline Dantas and Herdies, Dirceu Luis and 
                         Barbosa, Tatiane Felinto",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Meteorologia (INMET)}",
                title = "Patterns of atmospheric circulation associated with cold outbreaks 
                         in southern Amazonia",
              journal = "Meteorological Applications",
                 year = "2015",
               volume = "22",
               number = "2",
                pages = "129--140",
                month = "Apr.",
             keywords = "Amazon, Climate studies, friagem, Modelling, Verification.",
             abstract = "This study is based on climatological records (1979-2008) of cold 
                         outbreak (friagem) events that occurred in the southern Amazon 
                         region during the austral winter months (May to September). The 
                         friagem events were identified with an objective method that used 
                         climatological data from the surface station of the Department of 
                         Airspace Control (DCEA) in Vilhena city, including the minimum 
                         temperature (Tmin), the pressure reduced to mean sea level (Pmsl) 
                         and the decrease in Tmin (DTmin). The purpose of this study was to 
                         investigate the association between atmospheric circulation and 
                         friagem events using Climate Forecast System Reanalysis (CFSR) and 
                         a composite method. One hundred and forty-four friagem events were 
                         identified with the proposed methodology. These events produced 
                         large changes in weather conditions in Amazonia, including an 
                         abrupt decrease in air temperature, an increase in the amount of 
                         dry air, and an increase in surface pressure. The main atmospheric 
                         features associated with friagem events are an intensification of 
                         high post-frontal surface pressure that is caused by the 
                         intensification of a ridge at middle and high levels when air 
                         approaches the Andes and strong southerly winds at the surface 
                         that carry cold, dry air to tropical latitudes.",
                  doi = "10.1002/met.1458",
                  url = "http://dx.doi.org/10.1002/met.1458",
                 issn = "1350-4827",
                label = "self-archiving-INPE-MCTI-GOV-BR",
             language = "en",
           targetfile = "ricarte_patterns.pdf",
        urlaccessdate = "25 nov. 2020"