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Estudo de caso de ciclone extratropical sobre a América do Sul: sensibilidade das análises Case study of extratropical cyclone over the South America: sensibility of analysis

By David Mendes, Rildo Gonçalves De Moura and Monica Cristina Damião Mendes

Abstract

A trajetória e a energética de um ciclone extratropical são analisadas usando as reanálises do NCEP/NCAR, em comparação com as saídas do modelo CPTEC/COLA (T126L28) com análises do GPSAS. A analise da energética e da trajetória de um ciclone, formado no leste da Argentina em 23 de Agosto de 2005, mostrou diferenças significativas entre as reanálises e o modelo, principalmente na sua trajetória e magnitude. A comparação da evolução do ciclone extratropical entre as reanálises e o modelo, mostrou alguns resultados consideráveis, tais como: maior diferença na intensidade da pressão central do ciclone extratropical; maiores diferenças na Energia Cinética após a máxima intensidade do ciclone, e diferenças marcantes no posicionamento do ciclone extratropical.<br>The trajectory and the energetic of extratropical cyclones are analyzed using the NCEP/NCAR reanalysis in comparison with the model outputs CPTEC/COLA (T126L28) with GPSAS analysis. The analysis of the energetic and path of the cyclone formed over East Argentina on 23 August 2005 showed significant differences between the reanalysis and the model, especially in its track and magnitude. The comparison of the extratropical cyclone evolution, between reanalysis and the model, showed some considerable results such as: greater difference in the central pressure intensity of the extratropical cyclones; larger differences in kinetic energy after maximum cyclone intensity and a striking difference in the extratropical cyclone position

Topics: reanálises, análises, ciclone extratropical, modelagem, reanalysis, analysis, extratropical cyclone, modeling, Meteorology. Climatology, QC851-999, Physics, QC1-999, Science, Q, DOAJ:Meteorology and Climatology, DOAJ:Earth and Environmental Sciences
Publisher: Sociedade Brasileira de Meteorologia
Year: 2009
DOI identifier: 10.1590/S0102-77862009000400003
OAI identifier: oai:doaj.org/article:be5eef602e384cb5a6563f7eb0fb7757
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