Physics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jatp...47..363p&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 47, April 1985, p. 363-374.
Physics
14
Electric Fields, Gravity Waves, Ionospheric Currents, Propagation Modes, Wind (Meteorology), Atmospheric Attenuation, Atmospheric Models, Boundary Value Problems, E Region, F Region, Geomagnetism, Ionospheric Electron Density, Transmission
Scientific paper
The generation of small-scale electric fields in the ionospheric E and F regions has been investigated using three-dimensional gravity-wave winds for a variety of ionospheric conditions. It is found that for a given gravity wave, the component of the wave vector k(theta) along the geomagnetic field plays the most dominant role in the generation of the electric fields. The fields are generated mainly in the region where k(theta) = about 0, and this region can be referred to as the source region. The rest of the ionospheric region connected to this region via the geomagnetic field lines can be referred to as the load region. Further, if the integrated Pedersen conductivity in the source region is larger than in the load region, electric fields are generated efficiently. The attenuation of the field during transmission is dependent on the ratio of the Pedersen conductivity to the parallel conductivity and the wavelength of the gravity wave in question.
Pandey Rajeev R.
Prakash Suprabh
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