Vertical momentum transport over mountainous terrain
High-resolution pictures obtained with a handheld camera during the earth-orbital photographic mission of the Apollo IX spacecraft provided a unique opportunity to map the areal extent of gravity waves over the southwestern United States. The orientation of cumulus streets and cirrus streaks augmented conventional wind data for momentum and kinetic energy calculations. Zonal shearing stress gradients in stably stratified air flowing over rugged mountainous terrain indicated very large subgrid-scale vertical fluxes of zonal momentum. Maximum stress values of several tens of dynes cm-2 occurred ...
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