Fechar
Metadados

@MastersThesis{Cabrera:2018:EsMeFí,
               author = "Cabrera, Mylene Jaen",
                title = "Estudo dos mecanismos f{\'{\i}}sicos respons{\'a}veis pela 
                         estabilidade da camada limite atmosf{\'e}rica marinha na 
                         regi{\~a}o do Atl{\^a}ntico Sudoeste",
               school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                 year = "2018",
              address = "S{\~a}o Jos{\'e} dos Campos",
                month = "2018-05-29",
             keywords = "camada limite atmosf{\'e}rica marinha, atl{\^a}ntico sudoeste, 
                         advec{\c{c}}{\~a}o de temperatura, modelo COAWST, 
                         opera{\c{c}}{\~a}o ant{\'a}rtica XXXIII, marine atmospheric 
                         boundary layer, southwest atlantic, temperature advection, coawst 
                         model, antartic operation XXXIII.",
             abstract = "Com o objetivo de estudar os mecanismos din{\^a}micos e 
                         termodin{\^a}micos na interface oceano-atmosfera 
                         respons{\'a}veis pela estabilidade da camada limite 
                         atmosf{\'e}rica marinha (CLAM), na regi{\~a}o sudoeste do oceano 
                         Atl{\^a}ntico Sul, este trabalho utilizou o sistema de modelagem 
                         num{\'e}rica acoplado regional Coupled Ocean AtmosphereWave 
                         Sediment Transport (COAWST), com alt{\'{\i}}ssima 
                         resolu{\c{c}}{\~a}o espacial, e dados medidos in situ durante a 
                         Opera{\c{c}}{\~a}o Ant{\'a}rtica XXXIII (OP33). As 
                         simula{\c{c}}{\~o}es realizadas com o modelo COAWST foram 
                         avaliadas considerando a temperatura da superf{\'{\i}}cie do mar 
                         (TSM) e perfis verticais de temperatura e vento. No qual 
                         verificou-se que o modelo reproduziu de forma acertada tanto a TSM 
                         como os perfis de temperatura e vento. A estabilidade e o 
                         desenvolvimento da CLAM foram analisados, considerando a 
                         modula{\c{c}}{\~a}o local de TSM e os padr{\~o}es advectivos 
                         impostos pelas condi{\c{c}}{\~o}es sin{\'o}ticas atuantes. Para 
                         isso, foram selecionados tr{\^e}s estudos de caso, sob 
                         influ{\^e}ncia de condi{\c{c}}{\~o}es pr{\'e}-frontais, 
                         frontais e p{\'o}s-frontais. Os resultados demonstraram que a 
                         CLAM foi modulada pela advec{\c{c}}{\~a}o t{\'e}rmica, 
                         condicionada pelas situa{\c{c}}{\~o}es sin{\'o}ticas 
                         atmosf{\'e}ricas analisadas e pela TSM local, assim como foi 
                         observado em alguns casos um maior desenvolvimento da CLAM 
                         associado com o incremento do vento em superf{\'{\i}}cie. Na 
                         verifica{\c{c}}{\~a}o do mecanismo de ajuste hidrost{\'a}tico, 
                         foi observado a atua{\c{c}}{\~a}o deste mecanismo no estudo de 
                         caso influenciado por condi{\c{c}}{\~o}es frontais. A 
                         an{\'a}lise do papel dos termos das equa{\c{c}}{\~o}es 
                         horizontais de momentum em superf{\'{\i}}cie evidenciou maior 
                         influ{\^e}ncia dos termos de gradiente de press{\~a}o, coriolis, 
                         advec{\c{c}}{\~a}o e tend{\^e}ncia total, assim como, uma 
                         rela{\c{c}}{\~a}o entre o aumento do termo de difus{\~a}o 
                         horizontal e a diminui{\c{c}}{\~a}o do vento em 
                         superf{\'{\i}}cie em dois dos tr{\^e}s casos analisados. 
                         ABSTRACT: In order to study the dynamical and thermodynamic 
                         mechanisms at the oceanatmosphere interface, responsible for the 
                         stability of the Marine Atmospheric Boundary Layer (MABL), in the 
                         southwest of the South Atlantic Ocean, this work used the regional 
                         numerical modeling system Coupled Ocean Atmosphere Wave Sediment 
                         Transport (COAWST), with very high spatial resolution, and data 
                         measured in situ during Antarctic Operation XXXIII. The COAWST 
                         model simulations were evaluated considering the Sea Surface 
                         Temperature (SST) and temperature and wind vertical profiles. It 
                         was verified that the model correctly reproduced both SST and 
                         temperature and wind profiles. The MABL stability and development 
                         were analyzed, considering the local modulation of the SST and 
                         advective patterns imposed by synoptic conditions. Thus, three 
                         case studies were selected, influenced by pre-frontal, frontal and 
                         post-frontal conditions. The results showed that the MABL was 
                         modulated by thermal advection, conditioned by atmospheric 
                         synoptic conditions and local SST, as well as in some cases, a 
                         greater MABL development was associated with surface wind 
                         increment. During the case study influenced by frontal conditions, 
                         the hydrostatic adjustment mechanism was observed. The horizontal 
                         equation terms role analysis of the surface momentum showed a 
                         greater influence of the pressure gradient, coriolis, advection 
                         and total tendency, as well as a relation between the horizontal 
                         diffusion term increase and the surface wind reduction in two of 
                         three analyzed cases.",
            committee = "Arav{\'e}quia, Jos{\'e} Antonio (presidente) and Pezzi, Luciano 
                         Ponzi (orientador) and Camargo, Ricardo de",
         englishtitle = "Physical mechanisms study responsible for the stability of the 
                         marine atmospheric boundary layer in the Southwest Atlantic 
                         region.",
             language = "pt",
                pages = "120",
                  ibi = "8JMKD3MGP3W34R/3R5MRN5",
                  url = "http://urlib.net/rep/8JMKD3MGP3W34R/3R5MRN5",
           targetfile = "publicacao.pdf",
        urlaccessdate = "04 dez. 2020"
}


Fechar