Ionospheric hot spot at high latitudes

Details Ionospheric hot spot at high latitudes Ionospheric hot spot at high latitudes

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9.1045s&link_type=abstract

Geophysical Research Letters, vol. 9, Sept. 1982, p. 1045-1048.

Physics

29

F Region, Ionospheric Currents, Ionospheric Electron Density, Ionospheric Ion Density, Ionospheric Temperature, Polar Regions, Convection Currents, Convective Heat Transfer, Helium, Ion Temperature, Ionospheric Disturbances, Ionospheric Drift, Nitrogen, Oxygen, Thermal Diffusion

Scientific paper

Schunk and Raitt (1980) and Sojka et al. (1981) have developed a model of the convecting high-latitude ionosphere in order to determine the extent to which various chemical and transport processes affect the ion composition and electron density at F-region altitudes. The numerical model produces time-dependent, three-dimensional ion density distributions for the ions NO(+), O2(+), N2(+), O(+), N(+), and He(+). Recently, the high-latitude ionospheric model has been improved by including thermal conduction and diffusion-thermal heat flow terms. Schunk and Sojka (1982) have studied the ion temperature variations in the daytime high-latitude F-region. In the present study, a time-dependent three-dimensional ion temperature distribution is obtained for the high-latitude ionosphere for an asymmetric convection electric field pattern with enhanced flow in the dusk sector of the polar region. It is shown that such a convection pattern produces a hot spot in the ion temperature distribution which coincides with the location of the strong convection cell.

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