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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

South Atlantic Ocean cyclogenesis climatology simulated by regional climate model (RegCM3)

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Autor(es):
Reboita, Michelle Simoes [1] ; da Rocha, Rosmeri Porfirio [1] ; Ambrizzi, Tercio [1] ; Sugahara, Shigetoshi [2, 3]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Astron Geophys & Atmospher Sci, Dept Atmospher Sci, BR-05508900 Sao Paulo - Brazil
[2] Sao Paulo State Univ, Meteorol Res Inst, BR-17001970 Bauru, SP - Brazil
[3] Sao Paulo State Univ, Fac Sci, BR-17001970 Bauru, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Climate Dynamics; v. 35, n. 7-8, p. 1331-1347, DEC 2010.
Citações Web of Science: 34
Resumo

A detailed climatology of the cyclogenesis over the Southern Atlantic Ocean (SAO) from 1990 to 1999 and how it is simulated by the RegCM3 (Regional Climate Model) is presented here. The simulation used as initial and boundary conditions the National Centers for Environmental Prediction-Department of Energy (NCEP/DOE) reanalysis. The cyclones were identified with an automatic scheme that searches for cyclonic relative vorticity (zeta(10)) obtained from a 10-m height wind field. All the systems with zeta(10) a parts per thousand currency sign -1.5 x 10(-5) s(-1) and lifetime equal or larger than 24 h were considered in the climatology. Over SAO, in 10 years were detected 2,760 and 2,787 cyclogeneses in the simulation and NCEP, respectively, with an annual mean of 276.0 +/- A 11.2 and 278.7 +/- A 11.1. This result suggests that the RegCM3 has a good skill to simulate the cyclogenesis climatology. However, the larger model underestimations (-9.8%) are found for the initially stronger systems (zeta(10) a parts per thousand currency sign -2.5 x 10(-5) s(-1)). It was noted that over the SAO the annual cycle of the cyclogenesis depends of its initial intensity. Considering the systems initiate with zeta(10) a parts per thousand currency sign -1.5 x 10(-5) s(-1), the annual cycle is not well defined and the higher frequency occurs in the autumn (summer) in the NCEP (RegCM3). The stronger systems (zeta(10) a parts per thousand currency sign -2.5 x 10(-5) s(-1)) have a well-characterized high frequency of cyclogenesis during the winter in both NCEP and RegCM3. This work confirms the existence of three cyclogenetic regions in the west sector of the SAO, near the South America east coast and shows that RegCM3 is able to reproduce the main features of these cyclogenetic areas. (AU)

Processo FAPESP: 01/13925-5 - Desenvolvimento de um modelo climático regional para o Estado de São Paulo
Beneficiário:Tercio Ambrizzi
Modalidade de apoio: Auxílio à Pesquisa - Sistema Integrado de Hidrometeorologia do Estado de São Paulo - SIHESP
Processo FAPESP: 04/02446-7 - Ciclones extratropicais sobre o Atlântico Sul: simulações climáticas e o impacto da TSM
Beneficiário:Michelle Simões Reboita
Modalidade de apoio: Bolsas no Brasil - Doutorado