Evaluation of dependency of adjustment parameters of an E − I model with stratification thermal stable

Authors

  • Arlindo Dutra Carvalho Junior Universidade Federal do Pampa, Alegrete, RS
  • Pablo E.S. de Oliveira Universidade Federal de Santa Maria, Santa Maria, RS
  • Daniel Michelon dos Santos Universidade Federal do Pampa, Alegrete, RS
  • Felipe Denardin Costa Universidade Federal do Pampa, Alegrete, RS

DOI:

https://doi.org/10.5902/2179460X30831

Keywords:

Stable boundary layer, Turbulence, Atmospheric modeling

Abstract

One of the main challenges of the atmospheric model is the proper  determination of the turbulent diffusivity. In this sense, various
boundary layer parametrization have been developed along of the years. For the same closure order, many times, the bigger differences between them, are concentrated in the adjustment parameters. From the adequate physical description, to find the real value of each constant is the great challenge of the models. Them, the present work compare three different parametrization for the non-dimensional relation u2 ∗=E, that is used as a constant in the momentum diffusion coefficient in the E - l models. In the comparison with the GABLS experiment, the results show that the constant does not have a great influence over the wind
components and over the temperature. On the other hand, the constant have a fundamental role in the behavior of the turbulence kinetic energy. This is due the fact of the constant is also present in the turbulence viscous dissipation term. Finally, it is important to stress that this is a work that is in its beginning and it aims the construction of a boundary layer parameterization for climate and weather forecasting models.

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Author Biographies

Arlindo Dutra Carvalho Junior, Universidade Federal do Pampa, Alegrete, RS

Professor em Unipampa Alegrete.Aluno de Pós Graduação em UFSM.

Pablo E.S. de Oliveira, Universidade Federal de Santa Maria, Santa Maria, RS

Programa de Pós-Graduação em Meteorologia.

Daniel Michelon dos Santos, Universidade Federal do Pampa, Alegrete, RS

Programa de Pós-Graduação em Engenharia.

Felipe Denardin Costa, Universidade Federal do Pampa, Alegrete, RS

Programa de Pós-Graduação em Engenharia.

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Published

2018-04-18

How to Cite

Carvalho Junior, A. D., Oliveira, P. E. de, Santos, D. M. dos, & Costa, F. D. (2018). Evaluation of dependency of adjustment parameters of an E − I model with stratification thermal stable. Ciência E Natura, 40, 245–250. https://doi.org/10.5902/2179460X30831

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