Statistical and functional representations of the pattern of auroral energy flux, number flux, and conductivity

Details Statistical and functional representations of the pattern of auroral energy flux, number flux, and conductivity Statistical and functional representations of the pattern of auroral energy flux, number flux, and conductivity

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9212275h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Nov. 1, 1987, p. 12275-12294.

Other

181

Auroral Electrojets, Electron Precipitation, Energy Dissipation, Geomagnetic Latitude, Ohmic Dissipation, Statistical Analysis, Electric Fields, Morphology

Scientific paper

The global pattern of the height-integrated Hall and Pedersen conductivities produced by precipitating auroral electrons for several levels of geomagnetic activity as measured by K(p) is determined. These conductivities are found to vary smoothly in magnetic local time and corrected geomagnetic latitude, typically displaying a single peak conductivity value at each magnetic local time (MLT). There are generally two maxima for the conductivities in the nightside auroral oval, one near midnight and another several hours postmidnight. The peak Hall and Pedersen conductivities decrease with MLT away from midnight on both the morningside and eveningside of the oval, with the lowest peak conductivities seen in the postnoon sector. The global patterns for the height-integrated Hall and Pedersen conductivities as well as the integral energy flux and the integral number flux are found to be better fitted by Epstein functions than by a spherical harmonic expansion.

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