The Athena project, an unprecedented set of high-resolution climate simulations, was carried out by COLA scientists using the ECMWF IFS model. These experiments provide new insights into the potential for conventional general circulation models to capture fundamental dynamical mechanisms of weather and climate. The model was run at T159, T511, T1279 and T2047 for multiple decades of hindcasts with prescribed SST, in order to establish climatologies for the state of the modeled atmosphere at these extremely high resolutions. In this study the spatial distribution of finite-amplitude Lagrangian-mean wave activity is compared amongst these simulations revealing the convergence of the density of pseudomomentum at T511. The differences in wave activity between T159 and T1279 indicate a better resolved tropospheric surf zone on the flanks of the extra-tropical jet. This improved depiction of wave-breaking has consequences for the zonal-mean wind and the variability of the atmospheric annular modes. Additionally, 20th and 21st century timeslice experiments run at T159 and T1279 reveal the impact that this enhanced wave-breaking has on the shift of the tropospheric jet streams, a robust consequence of climate change seen in many model simulations as well as reanalysis observations.