The Doppler spread theory and parameterization revisited

Details The Doppler spread theory and parameterization revisited The Doppler spread theory and parameterization revisited

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jastp..66..949h&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 66, Issue 11, p. 949-956.

Physics

3

Gravity Waves, Middle Atmosphere, Doppler-Spread Theory, Doppler-Spread Parameterization

Scientific paper

The author's earlier Doppler Spread Theory (DST) and Doppler Spread Parameterization (DSP) are revisited with a new understanding of the dichotomous roles played by nonlinearity in Eulerian and Lagrangian coordinates, respectively. An embryo Lagrangian DST is introduced and employed to assess the original DST. Earlier results near the Eulerian spectral peak are found to be reasonably valid, whereas those at greater vertical wavenumber are confirmed to have produced too much spreading. The earlier DSP is found to need little if any change, though specific values are suggested for its two most important ``fudge factors''. In a more general context, the continuing identity of a wave undergoing certain nonlinear interactions with other waves is discussed.

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