Wavelength dependence of eddy dissipation and Coriolis force in the dynamics of gravity wave driven fluctuations in the OH nightglow

Details Wavelength dependence of eddy dissipation and Coriolis force in the dynamics of gravity wave driven fluctuations in the OH nightglow Wavelength dependence of eddy dissipation and Coriolis force in the dynamics of gravity wave driven fluctuations in the OH nightglow

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.4089h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, May 1, 1988, p. 4089-4101.

Other

28

Coriolis Effect, Eddy Viscosity, Gravity Waves, Hydroxyl Emission, Nightglow, Vortices, Gas Density, Isothermal Processes, Oxygen Atoms, Perturbation Theory, Thermal Conductivity

Scientific paper

This paper examines the effect of inclusion of Coriolis force and eddy dissipation in the gravity wave dynamics theory of Walterscheid et al. (1987). It was found that the values of the ratio 'eta' (where eta is a complex quantity describing the ralationship between the intensity oscillation about the time-averaged intensity, and the temperature oscillation about the time-averaged temperature) strongly depend on the wave period and the horizontal wavelength; thus, if comparisons are to be made between observations and theory, horizontal wavelengths will need to be measured in conjunction with the OH nightglow measurements. For the waves with horizontal wavelengths up to 1000 km, the eddy dissipation was found to dominate over the Coriolis force in the gravity wave dynamics and also in the associated values of eta. However, for waves with horizontal wavelengths of 10,000 km or more, the Coriolis force cannot be neglected; it has to be taken into account along with the eddy dissipation.

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