On the modelling of stationary planetary waves

The structure of the atmospheric stationary planetary waves is obtained by means of the quasi‐geostrophic linear model developed by Matsuno (1 970). To show the influence of the upper boundary condition on the structure of the waves, the latter is computed using a rigid top and a radiation condition. The modifications to the wave structure obtained when the upper boundary is lowered from a height of 65 km to 42.5 km, 32.5 km, and 22.5 km are examined. The effects of varying the vertical grid increment are studied through a comparison of the wave structures obtained with 6, 12, and 24 levels between 5 and 65 km.