Global measures of ionospheric electrodynamic activity inferred from combined incoherent scatter radar and ground magnetometer observations

Details Global measures of ionospheric electrodynamic activity inferred from combined incoherent scatter radar and ground magnetometer observations Global measures of ionospheric electrodynamic activity inferred from combined incoherent scatter radar and ground magnetometer observations

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.1061r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Feb. 1, 1990, p. 1061-1071.

Physics

34

Electrodynamics, Incoherent Scatter Radar, Magnetometers, Magnetosphere-Ionosphere Coupling, Electric Current, Electric Potential, Electrical Resistance, Energy Transfer, Polar Regions

Scientific paper

An analysis of several global measures of high-latitude ionospheric electrodynamic activity is undertaken on the basis of results obtained from the Assimilative Mapping of Ionospheric Electrodynamics (AMIE) procedure applied to incoherent scatter radar and ground magnetometer observations for January 18-19, 1984. Different global measures of electric potentials, currents, resistances, and energy transfer from the magnetosphere show temporal variations that are generally well correlated. Parameterizations of these quantities in terms of the AE index and the hemispheric power index of precipitating auroral particles are presented. It is shown how error estimates of the mapped electric fields can be used to correct the estimation of Joule heating. Global measures of potential drop, field-aligned current, and Joule heating as obtained by the AMIE procedure are compared with similar measures presented in previous studies.

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