Fig. 5
From: Impacts of orography on large-scale atmospheric circulation
The mean zonal component of gravity wave momentum flux (N m−2) at 7 km above sea level as predicted by 1-month-long simulations (December 2015) of flow across the Rockies with the Met Office Unified Model. The right-hand panel shows the parametrized flux produced by a simulation with a coarse (32 km) grid. The left-hand panel shows the simulated flux resolved on a much finer (2 km) grid, after it has been coarse-grained onto the 32 km grid. Comparison of the two momentum flux fields allows one to determine the realism of the parametrization scheme
