Eddy transport in the stably stratified planetary boundary layers and in the free atmosphere: upper troposphere and lower stratosphere

Albert F. Kurbatskii; Lyudmila I. Kurbatskaya

doi:10.1117/12.2503950

13 December 2018 Eddy transport in the stably stratified planetary boundary layers and in the free atmosphere: upper troposphere and lower stratosphere

Albert F. Kurbatskii, Lyudmila I. Kurbatskaya

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Proceedings Volume 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 108337F (2018) https://doi.org/10.1117/12.2503950
Event: XXIV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2018, Tomsk, Russian Federation

Abstract

Modeling turbulence is an important object of environmental sciences for describing an essential turbulent transport of heat and momentum in the boundary layer of the atmosphere. The many turbulence model used in the simulation of flows in the environment, based on the concept of eddy viscosity, and buoyancy effects are often included in the expression for the turbulent fluxes through empirical functions, based on the similarity theory of Monin-Obukhov, fair, strictly speaking, only in the surface layer. Furthermore, significant progress has been made in recent years in the development broader than standard hypothesis turbulent viscosity models for the eddy diffusivity momentum and heat, as result of the recording of differential equations for the Reynolds stresses and vector turbulent heat flux in a weaklyequilibrium approximation, which neglects advection and the diffusion of certain dimensionless quantities. Explicit algebraic model turbulent Reynolds stresses and heat flux vector for the planetary boundary layer is used in the stable atmospheric boundary layer, the upper troposphere, and the lower stratosphere. The present algebraic model of turbulence built on physical principles RANS (Reynolds Average Navier Stokes) approach for stratified turbulence uses three prognostic equations and shows correct reproduction of the main characteristics of the stably stratified boundary layer and evaluated the vertical eddy diffusivities of momentum and heat in the upper troposphere and the lower stratosphere.

Citation Download Citation

Albert F. Kurbatskii and Lyudmila I. Kurbatskaya "Eddy transport in the stably stratified planetary boundary layers and in the free atmosphere: upper troposphere and lower stratosphere", Proc. SPIE 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 108337F (13 December 2018); https://doi.org/10.1117/12.2503950

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KEYWORDS

Atmospheric modeling

Troposphere

Turbulence

Stratosphere

Diffusion

Heat flux

Atmospheric sciences

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