F region meridional wind spectral behavior

Details F region meridional wind spectral behavior F region meridional wind spectral behavior

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99..349g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A1, p. 349-353

Physics

Atmospheric Circulation, F Region, Meridional Flow, Power Spectra, Thermosphere, Annual Variations, Energy Spectra, Geomagnetic Latitude, Geomagnetism

Scientific paper

Analyses of power spectral density slope and integrated power (energy) of upper thermospheric meridional wind for eight ionospheric stations in both hemispheres during a full year, have been performed. The observed spectral slope ranges between 1.2 and 3, depending on station location and epoch of the year, presenting levels and variability mostly related with geomagnetic latitude. However, the associated spectral energy seems to depend on geomagnetic latitude as well as on season at some latitudes, but in a different way from the spectral slope. Both parameters seem to be uncorrelated, suggesting that their evolution depends on different physical mechanisms. There is not significant correlation between the spectral slope and energy parameters with total meridional wind, indicating that they are associated with small-scale phenomena rather than with total wind.

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