Statistics – Computation
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jats...38.1841s&link_type=abstract
Journal of the Atmospheric Sciences, vol. 38, Sept. 1981, p. 1841-1855. Navy-NASA-supported research.
Statistics
Computation
9
Atmospheric Circulation, Atmospheric Models, Euler-Lagrange Equation, Planetary Waves, Stratosphere, Atmospheric Heating, Damping, Flow Equations, Flow Velocity, Ozone, Wave Interaction, Wave Propagation, Winter
Scientific paper
A simple equation for the Lagrangian-mean flow induced by damped planetary waves is derived. The flow computed for stationary planetary waves of a beta-plane is found to be generally poleward and downward during winter and appears to be about twice as strong as the diabatic circulation in the lower stratosphere. An important factor in determining the high-latitude Lagrangian-mean flow field is the subtropical jet stream which blocks planetary wave propagation toward the equatorial regions. Computations using two types of Lagrangian-mean boundary conditions at the surface show that incorrect orographic forcing distorts the Lagrangian-mean flow up to three scale heights or more above ground.
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