ANALYSIS OF THE SINGLE COLUMN MODEL PERFORMANCE USING DIFFERENT PARAMETERIZATIONS FOR THE VISCOUS DISSIPATION RATE OF TURBULENCE KINETIC ENERGY

Authors

  • Janete Gonçalves Lira Universidade Federal do Pampa
  • Eduardo Stüker Universidade Federal do Pampa
  • Jean Jonathan Schuster Universidade Federal do Pampa
  • Cristiano Henrique Schuster Universidade Federal do Pampa
  • Daniel Michelon dos Santos Universidade Federal do Pampa
  • Luiz Eduardo Medeiros Universidade Federal do Pampa
  • Felipe Denardin Costa Universidade Federal do Pampa

DOI:

https://doi.org/10.5902/2179460X20280

Keywords:

Stable boundary layer. Turbulence. Vicous dissipation single column model.

Abstract

The proper description of the atmospheric flow in the stable atmospheric boundary layer is one of the most complex tasks to be performed by numerical models of weather and climate prediction. Most of the parameterizations used in these models are based on the statistical theory of turbulence in their conception. However, this theory is valid only for a flow in which turbulence is homogeneous, isotropic and stationary, a conditions that are not commonly found overnight. Basically, the nighttime flow can be classified in two major regimes: very stable, where turbulence is almost entirely suppressed; and weakly stable regime, with intense turbulent mixing. The transition between these regimes is known as atmospheric coupling, and it can happens a lot of times along the same night. In this work, we implemented a single column model with turbulence closure 1.5, in three different configurations and three different turbulence formulations. In general, the model results show that, all the configurations are able to reproduce the average characteristics of the flow in the weakly stable conditions.

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Author Biographies

Janete Gonçalves Lira, Universidade Federal do Pampa

Programa de Pós Graduação em Engenharia, Universidade Federal do Pampa, Campus Alegrete, Alegrete, RS, Brasil.

Eduardo Stüker, Universidade Federal do Pampa

Programa de Pós Graduação em Engenharia, Universidade Federal do Pampa, Campus Alegrete, Alegrete, RS, Brasil.

Jean Jonathan Schuster, Universidade Federal do Pampa

Programa de Pós Graduação em Engenharia, Universidade Federal do Pampa, Campus Alegrete, Alegrete, RS, Brasil.

Cristiano Henrique Schuster, Universidade Federal do Pampa

Programa de Pós Graduação em Engenharia, Universidade Federal do Pampa, Campus Alegrete, Alegrete, RS, Brasil.

Daniel Michelon dos Santos, Universidade Federal do Pampa

Programa de Pós Graduação em Engenharia, Universidade Federal do Pampa, Campus Alegrete, Alegrete, RS, Brasil.

Luiz Eduardo Medeiros, Universidade Federal do Pampa

Programa de Pós Graduação em Engenharia, Universidade Federal do Pampa, Campus Alegrete, Alegrete, RS, Brasil.

Felipe Denardin Costa, Universidade Federal do Pampa

Programa de Pós Graduação em Engenharia, Universidade Federal do Pampa, Campus Alegrete, Alegrete, RS, Brasil.

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Published

2016-07-20

How to Cite

Lira, J. G., Stüker, E., Schuster, J. J., Schuster, C. H., Santos, D. M. dos, Medeiros, L. E., & Costa, F. D. (2016). ANALYSIS OF THE SINGLE COLUMN MODEL PERFORMANCE USING DIFFERENT PARAMETERIZATIONS FOR THE VISCOUS DISSIPATION RATE OF TURBULENCE KINETIC ENERGY. Ciência E Natura, 38, 394–400. https://doi.org/10.5902/2179460X20280

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