Wind corners in the winter mesosphere

Details Wind corners in the winter mesosphere Wind corners in the winter mesosphere

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12..673v&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 12, Oct. 1985, p. 673-676.

Mathematics

Logic

5

Mesosphere, Radar Tracking, Winds Aloft, Winter, Chaff, Meteorological Radar, Vertical Distribution, Wind Direction, Wind Shear

Scientific paper

A series of 18 mesospheric wind profiles with an altitude resolution of about 50 m has been obtained by means of radar tracking of chaff clouds. The experiments were performed during wintertime at 69 deg N latitude and they cover mostly the 72 to 86 km altitude range. The observed wind shears frequently concentrate the changes of wind direction alpha with altitude z into shallow layers, which are designated 'wind corners'. They are characterized by having large directional gradients (not less than 5 deg/100 m) and by having a small vertical extent (not greater than 500 m). Also wind corners separate altitude layers of a few km thickness in which little change of wind direction occurs. Frequently wind corners coincide with local minima in the horizontal wind speed (not greater than 15 m/s).

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