Surname: Russell
First Name: Albert
Status= studentyes
Institution: University of Western Ontario
E-mail: atrussel@julian.uwo.ca
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Title: 
Observations of High Frequency Gravity Wave Spectra
in the Middle Upper Stratosphere
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Authors: 
A. T. Russell and R. J. Sica,
Dept. of Physics and Astronomy,
University of Western Ontario,
London, Ontario,
Canada
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Abstract: 
The spectral analysis of density fluctuations obtained with the
Purple Crow Lidar has shown that middle upper stratospheric temp-   
oral spectra follow the expected -1.5 to -2.0 power law to freq-
uencies of approximately 1/(15 min). At higher frequencies, the
shape of the spectrum is much more variable with strong quasi-
monochromatic features appearing intermittently on certain nights.
These higher frequency features have been attributed to nonlinear
wave interactions and suggest that estimates of middle upper strat-
ospheric gravity wave activity, energy dissipation, and eddy dif-
fusion values may be much larger and more variable than previously
assumed.
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Discipline Category: Stratosphere