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Auroral Energy Flux and Joule Heating Derived From Global Maps of Field-Aligned Currents
We calculate auroral energy flux and Joule heating in the high-latitude ionosphere for 27 geomagnetically active days using two-dimensional maps of field-aligned currents determined by the Active Magnetosphere and Planetary Response Experiment. The energy input to the ionosphere due to Joule heating increases more rapidly with geomagnetic activity than that due to precipitating particles. The energy flux varies more smoothly with time than Joule heating, which is impulsive in nature on time scales from minutes to tens of min ...
Published by: Geophysical Research Letters Published on:
YEAR: 2021   DOI: 10.1029/2020GL091527
Geomagnetic storms; Auroral energy flux; auroral energy input; auroral substorms; Joule heating; ring current