1,2- 1Charles University, Faculty of Mathematics and Physics, Department of Atmospheric Physics, Prague, Czechia (dominika.hajkova@mff.cuni.cz)
- 2University of Natural Resources and Life Sciences, Vienna (BOKU), Austria
Orographic gravity waves (OGWs) are ubiquitous in our atmosphere and play an important role in the energy transport both horizontally as well as vertically to the higher levels. Due to their scales, they have to be parameterized in the models.
In this work we are trying to show how the differences in OGW drag between the models in CMIP6 initiative influence the resolved waves propagation and subsequently also the polar vortex.
Taking OGW drag over the maximum in the mid-latitudes in the lower stratosphere, we can show high correlations with Eliassen-Palm flux divergence, but also the zonal winds. Using different descriptive measures of poler vortex such as sudden stratospheric warming frequency (SSW) or Northern Hemisphere annular mode (NAM) we also try to connect this relationship to the strength of the polar vortex.
How to cite: Hájková, D., Šácha, P., and Kuchař, A.: Orographic gravity wave drag in CMIP6 and its influence on the polar vortex, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-1002, https://doi.org/10.5194/egusphere-egu26-1002, 2026.
