Preprints
https://doi.org/10.5194/acp-2022-816
https://doi.org/10.5194/acp-2022-816
 
04 Jan 2023
04 Jan 2023
Status: this preprint is currently under review for the journal ACP.

Numerical modeling of relative contribution of planetary waves to the atmospheric circulation

Andrey V. Koval1,2, Olga N. Toptunova2, Maxim A. Motsakov2, Ksenia A. Didenko1,2, Tatiana S. Ermakova1,2, Nikolai M. Gavrilov1, and Eugene V. Rozanov3 Andrey V. Koval et al.
  • 1Atmospheric Physics Department, Saint-Petersburg State University, Saint Petersburg, 199034, Russia
  • 2Department of Meteorological Forecasts, Russian State Hydrometeorological University, 195196 Saint-Petersburg, Russia
  • 3Physikalisch-Meteorologisches Observatorium, Davos World Radiation Centre, Davos Dorf, 7260, Switzerland

Abstract. Using the general circulation model of the middle and upper atmosphere (MUAM), a number of numerical scenarios were implemented to study the impact of individual planetary waves (PWs) on the global atmospheric circulation, including zonal wind, temperature, and residual meridional circulation. The calculations were performed for the winter conditions of the Northern Hemisphere (January–February). The contribution to the formation of the dynamic and temperature regimes of the middle and upper atmosphere made by equatorial Kelvin waves propagating to the east, as well as atmospheric normal modes with periods from 4 to 16 days is shown. In particular, it is demonstrated that the impact of a 5-day PW and an ultrafast Kelvin wave can change the speed of circulation flows by up to 5 % in the areas of their amplitude maxima. The presented research results are important for a deeper understanding of the mechanisms of large-scale atmospheric interactions. Despite the obviousness and simplicity of the problem, such work has not been carried out at the moment.

Andrey V. Koval et al.

Status: open (until 24 Feb 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2022-816', Anonymous Referee #1, 27 Jan 2023 reply
    • AC1: 'Reply on RC1', Andrey Koval, 27 Jan 2023 reply
  • CC1: 'Comment on acp-2022-816', Elena N. Savenkova, 30 Jan 2023 reply

Andrey V. Koval et al.

Andrey V. Koval et al.

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Short summary
Periodic changes in all hydrodynamic parameters are constantly observed in the atmosphere. The amplitude of these fluctuations increases with height due to a decrease in the atmospheric density. In the upper layers of the atmosphere, waves are the dominant form of motion. We using general circulation model of the atmosphere to study contribution to the formation of the dynamic and temperature regimes of the middle and upper atmosphere made by different planetary waves.
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