@Article{PezziQuLoMiRoLiSu:2022:RoHeFl,
               author = "Pezzi, Luciano Ponzi and Quadro, Mario F. L. and Lorenzzetti, 
                         Jo{\~a}o Ant{\^o}nio and Miller, Arthur J. and Rosa, Eliana 
                         Bertol and Lima, Leonardo Nascimento and Sutil, Ueslei Adriano",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Federal de Santa Catarina (IFSC)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {University of California} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "The effect of Oceanic South Atlantic Convergence Zone episodes on 
                         regional SST anomalies: the roles of heat fluxes and upper-ocean 
                         dynamics",
              journal = "Climate Dynamics",
                 year = "2022",
               volume = "59",
               number = "7/8",
                pages = "2041--2065",
                month = "Oct.",
             keywords = "SACZ, Air-sea interaction, Ocean mixed layer heat budget, 
                         Ocean–atmosphere dynamic and thermodynamic, Regional coupled 
                         modeling, Ekman transport and oceanic SACZ.",
             abstract = "The South Atlantic Convergence Zone (SACZ) is an atmospheric 
                         system occurring in austral summer on the South America continent 
                         and sometimes extending over the adjacent South Atlantic. It is 
                         characterized by a persistent and very large, 
                         northwest-southeast-oriented, cloud band. Its presence over the 
                         ocean causes sea surface cooling that some past studies indicated 
                         as being produced by a decrease of incoming solar heat fux induced 
                         by the extensive cloud cover. Here we investigate oceanatmosphere 
                         interaction processes in the Southwestern Atlantic Ocean (SWA) 
                         during SACZ oceanic episodes, as well as the resulting modulations 
                         occurring in the oceanic mixed layer and their possible feedbacks 
                         on the marine atmospheric boundary layer. Our main interests and 
                         novel results are on verifying how the oceanic SACZ acts on 
                         dynamic and thermodynamic mechanisms and contributes to the sea 
                         surface thermal balance in that region. In our oceanic SACZ 
                         episodes simulations we confrm an ocean surface cooling. Model 
                         results indicate that surface atmospheric circulation and the 
                         presence of an extensive cloud cover band over the SWA promote sea 
                         surface cooling via a combined efect of dynamic and thermodynamic 
                         mechanisms, which are of the same order of magnitude. The sea 
                         surface temperature (SST) decreases in regions underneath oceanic 
                         SACZ positions, near Southeast Brazilian coast, in the South 
                         Brazil Bight (SBB) and ofshore. This cooling is the result of a 
                         complex combination of factors caused by the decrease of solar 
                         shortwave radiation reaching the sea surface and the reduction of 
                         horizontal heat advection in the Brazil Current (BC) region. The 
                         weakened southward BC and adjacent ofshore region heat advection 
                         seems to be associated with the surface atmospheric circulation 
                         caused by oceanic SACZ episodes, which rotate the surface wind and 
                         strengthen cyclonic oceanic mesoscale eddy. Another singular 
                         feature found in this study is the presence of an atmospheric 
                         cyclonic vortex Southwest of the SACZ (CVSS), both at the surface 
                         and aloft at 850 hPa near 24°S and 45°W. The CVSS induces an SST 
                         decrease southwestward from the SACZ position by inducing 
                         divergent Ekman transport and consequent ofshore upwelling. This 
                         shows that the dynamical efects of atmospheric surface circulation 
                         associated with the oceanic SACZ are not restricted only to the 
                         region underneath the cloud band, but that they extend 
                         southwestward where the CVSS presence supports the oceanic SACZ 
                         convective activity and concomitantly modifes the ocean dynamics. 
                         Therefore, the changes produced in the oceanic dynamics by these 
                         SACZ events may be important to many areas of scientifc and 
                         applied climate research. For example, episodes of oceanic SACZ 
                         may infuence the pathways of pollutants as well as fsh larvae 
                         dispersion in the region.",
                  doi = "10.1007/s00382-022-06195-3",
                  url = "http://dx.doi.org/10.1007/s00382-022-06195-3",
                 issn = "0930-7575",
             language = "en",
           targetfile = "s00382-022-06195-3.pdf",
        urlaccessdate = "20 maio 2024"
}