Model simulation of the global circulation in the middle atmosphere for January conditions

I V Mingalev,V S Mingalev,O V Mingalev

doi:10.5194/adgeo-15-11-2008

I V Mingalev, V S Mingalev + Show 1 more

Open Access

https://doi.org/10.5194/adgeo-15-11-2008

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Abstract

Abstract. A mathematical model of the global neutral wind system of the Earth's atmosphere, developed earlier in the Polar Geophysical Institute (PGI), is utilized to simulate the large-scale global circulation of the middle atmosphere for January conditions. The utilized model enables to calculate not only the horizontal components but also the vertical component of the neutral wind velocity by means of a numerical solution of a generalized Navier-Stokes equation for compressible gas, so the hydrostatic equation is not applied. Global distributions of the horizontal and vertical wind, calculated for January conditions, are compared with simulation results, obtained earlier for conditions corresponding to summer in the northern hemisphere. It was found that the global distributions of the neutral wind, calculated both for winter and for summer periods in the northern hemisphere, in particular, the large-scale circumpolar vortices, are consistent with the planetary circulation of the atmosphere, obtained from observations.

Highlights

Not long ago, a new mathematical model of the global neutral wind system in the Earth’s atmosphere has been developed in the Polar Geophysical Institute (PGI) (Mingalev and Mingalev, 2005; Mingalev et al, 2007)
The hydrostatic equation, usually utilized in the global circulation models, is not used in the new model. This model has been applied in order to simulate the global circulation of the middle atmosphere for conditions corresponding to summer in the northern hemisphere (Mingalev and Mingalev, 2005; Mingalev et al, 2007). This model is utilized to simulate the global distributions of the atmospheric parameters in the middle atmosphere for conditions corresponding to winter in the northern hemisphere
A specific feature of the applied model is that the vertical component of the neutral wind velocity, as well as horizontal components of the neutral wind, are obtained by means of a numerical solution of the appropriate momentum equation for a viscous gas without any simplifications

Summary

Introduction

A new mathematical model of the global neutral wind system in the Earth’s atmosphere has been developed in the PGI (Mingalev and Mingalev, 2005; Mingalev et al, 2007). The characteristic feature of the model is that the vertical component of the neutral wind velocity, as well as horizontal components of the neutral wind, are obtained by means of a numerical solution of the appropriate momentum equation. This model has been applied in order to simulate the global circulation of the middle atmosphere for conditions corresponding to summer in the northern hemisphere (Mingalev and Mingalev, 2005; Mingalev et al, 2007). The simulation results are compared with results, obtained earlier, and with observational data

Numerical model

Simulation results and discussion

Conclusions