Koval, A.V., Gavrilov, N.M., Zubov, V.A., Rozanov, E.V., Golovko, A.G. Modified Parameterization Scheme of Orographic Gravity Waves in the SOCOL Chemistry-Climate Model. Pure Appl. Geophys. (2024). https://doi.org/10.1007/s00024-024-03619-5
Published: 12 December 2024
Abstract:
This paper describes the results of modifying the parametrization of subgrid stationary orographic gravity waves (OGWs) in the chemistry-climate model SOCOL, version 3. The originally used OGW parameterization is modified using polarization relations for stationary waves in the rotating atmosphere. Parameterizing the OGW generation by the Earth’s topography at subgrid scales follows the widely used Lott and Miller scheme, but the expressions for calculating the vertical profiles of OGW amplitudes, wave drag and heat influx, are modified. Test simulations of the general atmospheric circulation for 10 years (from 2009 to 2018) have been launched with the SOCOL model involving the modified OGW parameterization. Using the realistic profiles of the background wind and temperature, characteristics of OGWs propagating in the atmosphere from the Earth’s surface to the heights of about 80 km are simulated for different locations in the Northern and Southern Hemispheres. Comparisons with the MERRA2 reanalysis data show that the modified OGW parameterization provides better agreement of simulated and observed multiyear-mean zonal wind and temperature in the mesosphere and lower thermosphere region. The modified parameterization can be used in other atmospheric circulation models.