Some aspects of Doppler radar measurements of the mean and fluctuating components of the wind field in the upper middle atmosphere

Details Some aspects of Doppler radar measurements of the mean and fluctuating components of the wind field in the upper middle atmosphere Some aspects of Doppler radar measurements of the mean and fluctuating components of the wind field in the upper middle atmosphere

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jatp...49..467r&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 49, May 1987, p. 467-484.

Mathematics

Logic

24

Doppler Radar, Middle Atmosphere, Radar Measurement, Velocity Distribution, Wind Velocity Measurement, Gravity Waves, Internal Waves, Meteorological Radar, Reynolds Stress, Stress Tensors

Scientific paper

The basic assumptions made when a Doppler radar is used to measure the mean and fluctuating components of the wind field in the middle atmosphere with various beam configurations are examined. Particular reference is made to the measurement of the various components of the Reynolds stress tensor associated with short period internal gravity waves. It is shown that it is not generally possible to measure the upward flux of horizontal momentum with the conventional Doppler radar beam configuration in the upper middle atmosphere and that an optimum beam configuration is that in which beams are directed at + theta and - theta to the zenith in both the zonal and meridional planes. This allows five of the six components of the Reynolds stress tensor to be obtained directly from the mean square radial velocities. In addition, the mean wind components and, in principle, the horizontal divergence and stretching deformations may be obtained.

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