@Article{EscobarRebo:2022:ReDaAt,
               author = "Escobar, Gustavo Carlos Juan and Reboita, Michelle Sim{\~o}es",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Federal de Itajub{\'a} (UNIFEI)}",
                title = "Relationship between daily atmospheric circulation patterns and 
                         South Atlantic Convergence Zone (SACZ) events",
              journal = "Atm{\'o}sfera",
                 year = "2022",
               volume = "35",
               number = "1",
                pages = "1--25",
             keywords = "synoptic variability, classification, SACZ.",
             abstract = "This study presents the daily atmospheric circulation patterns at 
                         surface and altitude related to the South Atlantic Convergence 
                         Zone (SACZ) events that occurred between 2007 and 2017. For this 
                         analysis, Principal Pattern Sequence Analysis (PPSA) and sea level 
                         pressure and geopotential height reanalysis were used. Four 
                         typical atmospheric circulation patterns associated with SACZ 
                         episodes were identified. Three of them are related to the 
                         propagation of a cold front toward southeastern Brazil with a 
                         post-frontal anticyclone moving over the Atlantic Ocean. The 
                         fourth pattern is associated with the presence of a cut-off low 
                         centered over the central-south region of Brazil that induces 
                         moisture transport from the Atlantic Ocean and from the Amazon 
                         basin to most of southeastern Brazil. Considering the first three 
                         patterns, they represent, respectively, a frontal wave, a 
                         classical cold front, and a slow-moving cold front. All of these 
                         patterns provide permanent northwesterly winds in the lower 
                         troposphere over southeastern Brazil from two days before the SACZ 
                         occurrence. RESUMEN: Este trabajo presenta los patrones diarios de 
                         circulaci{\'o}n atmosf{\'e}rica en superficie y en altura 
                         relacionados con los eventos de la Zona de Convergencia del 
                         Atl{\'a}ntico Sur (ZCAS) ocurridos entre 2007 y 2017. Para ello 
                         se utilizaron el an{\'a}lisis de patrones de secuencias 
                         principales (APSP) y datos de rean{\'a}lisis de presi{\'o}n a 
                         nivel medio del mar y de altura geopotencial. Se identificaron 
                         cuatro patrones t{\'{\i}}picos de circulaci{\'o}n 
                         atmosf{\'e}rica asociados con episodios de la ZCAS. Tres de ellos 
                         est{\'a}n relacionados con la propagaci{\'o}n de un frente 
                         fr{\'{\i}}o hacia el sureste de Brasil con un anticicl{\'o}n 
                         postfrontal que se mueve sobre el Oc{\'e}ano Atl{\'a}ntico. El 
                         cuarto patr{\'o}n est{\'a} asociado con la presencia de una baja 
                         segregada centrada sobre la regi{\'o}n centro-sur de Brasil que 
                         induce el transporte de humedad desde el Oc{\'e}ano 
                         Atl{\'a}ntico y desde la cuenca del Amazonas hacia gran parte del 
                         sureste de Brasil. Los tres primeros patrones representan, 
                         respectivamente, una onda frontal, un frente fr{\'{\i}}o 
                         cl{\'a}sico y un frente fr{\'{\i}}o con un lento 
                         desplazamiento. Todos estos patrones producen vientos persistentes 
                         del noroeste en la troposfera baja sobre el sureste de Brasil 
                         desde dos d{\'{\i}}as antes de la ocurrencia de eventos de la 
                         ZCAS.",
                  doi = "10.20937/ATM.52936",
                  url = "http://dx.doi.org/10.20937/ATM.52936",
                 issn = "0187-6236",
             language = "en",
           targetfile = "52936-Article Text-155897-1-10-20211217.pdf",
        urlaccessdate = "14 jun. 2024"
}