Doppler Radar Observation of Wind Structure in Snow.

Details Doppler Radar Observation of Wind Structure in Snow. Doppler Radar Observation of Wind Structure in Snow.

Apr 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971japme..10..228b&link_type=abstract

Journal of Applied Meteorology, vol. 10, Issue 2, pp.228-233

Physics

1

Scientific paper

Sinusoidal variations in the longitudinal speed of the wind in the planetary boundary layer are observed with a C-band multiple-gate Doppler radar using snow as a wind tracer. These undulations in the horizontal wind are believed to be orographically generated wave phenomena. The observed wind structures have average scale lengths of 300 m and their amplitude decreases with altitude. The propagation speeds of the, wind structures have been determined with a spatial correlation technique and have, at times, been found to depart appreciably from the mean ambient wind. Under stable atmospheric conditions the wind structures persist for a considerable period. In one extreme case the structures preserved identifiable characteristics during advection over a distance of 9 km. This remarkable persistence resulted in a Lagrangian-Eulerian time-scale ratio of 45.

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