Comments on 'Gravity Wave Refraction by Three-Dimensionally Varying Winds and the Global Transport of Angular Momentum''

摘要

Hasha et al. (2008, hereafter HBS) recently examined the role of horizontal variations in the large-scale flow on the pseudomomentum flux in vertically propagating gravity waves, focusing on applications in climate dynamics. They conclude ‘‘. . . columnar parameterization schemes for topographic waves should produce results that are little affected by the neglect of three-dimensional effects, which is encouraging.’’While I do not dispute their conclusions about the net influence of horizontal atmospheric structure on monthly-averaged profiles of the pseudomomentum flux, it is important to note that results published previously by Chen et al.