Physics
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jatp...40..529s&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 40, May 1978, p. 529-540.
Physics
Atmospheric Tides, Atmospheric Turbulence, Gravity Waves, Shear Layers, Thermosphere, Wind Shear, Coriolis Effect, Energy Dissipation, Flow Equations, Nonlinear Equations, Turbulent Flow, Wave Interaction
Scientific paper
An approach to the nonlinear interaction between internal gravity waves developed by Teitelbaum and Sidi (1976) is extended to the case of interactions between atmospheric tides and gravity waves. The nonlinear approximation developed previously is extended to the three-dimensional case which includes Coriolis forces and can be applied unambiguously to flows in the lower thermosphere. The theory developed is used to analyze data on a turbulent wind shear region studied on a sodium trail produced over El Arenosillo, Spain. It is found that thin turbulent layers are produced in an initially stable flow; this phenomenon is produced by a shear layer, which can remain stable up to a very high value of wind shear. The shear layer then suddenly becomes unstable and leads to a turbulent layer with a very high energy dissipation rate.
Sidi Claude
Teitelbaum Hector
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