REPRESENTATION OF ATMOSPHERIC PATTERNS RELATED TO THE SOUTH ATLANTIC CONVERGENCE ZONE BY AN ATMOSPHERE-BIOSPHERE COUPLED MODEL

Authors

  • Leonardo Preza Rodrigues Analista de Geomarketing - TIM Celular S.A., RJ
  • Mônica Carneiro Alves Senna Departamento de Análise Geoambiental - Universidade Federal Fluminense, RJ
  • Marcio Cataldi Departamento de Engenharia Agrícola e Meio Ambiente - Universidade Federal Fluminense, RJ

DOI:

https://doi.org/10.5902/2179460X17179

Keywords:

ZCAS, precipitação, climatologia, modelagem, CCM3-IBIS

Abstract

Extreme weather events are becoming more prominent in academic discussions and media articles, such as South Atlantic Convergence Zone (SACZ), which is a major weather system that influences rainfall in Brazil during the summer months. The relevance of the phenomenon makes it an important process to be mapped and understood. This work seeks to understand how the biosphere-atmosphere coupled model CCM3-IBIS represents the climatology of the SACZ occurrence and formation, and its behavior patterns at different atmospheric levels. The control simulation was run for a period of 50 years, and average monthly maps of the following environmental variables were elaborated: Wind, Divergence, Specific Humidity, Omega, Outgoing Longwave Radiation, Cloudiness and Precipitation. The CCM3-IBIS model represented satisfactorily the characteristics of the SACZ, where areas of low level convergence, negative speed Omega in average levels, divergence at high levels, and high values of specific surface moisture appear on phase, i.e., spatially agreeing with each other, confirming the presence of convective clouds associated with low values of outgoing longwave radiation and high precipitation rates, oriented NW-SE from the convective region of the Amazon to southeastern South America, reaching the extratropical Atlantic Ocean.

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Published

2016-01-31

How to Cite

Rodrigues, L. P., Senna, M. C. A., & Cataldi, M. (2016). REPRESENTATION OF ATMOSPHERIC PATTERNS RELATED TO THE SOUTH ATLANTIC CONVERGENCE ZONE BY AN ATMOSPHERE-BIOSPHERE COUPLED MODEL. Ciência E Natura, 38(1), 281–289. https://doi.org/10.5902/2179460X17179

Issue

Vol. 38 No. 1 (2016)

Section

Meteorology

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