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.