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Solar wind structure sources and periodicities of auroral electron power over three solar cycles
We assess the contributions of various types of solar wind structures (transients, coronal hole high-speed streams (HSS), and slow-speed wind) to hourly average auroral electron power (Pe). The time variation of the solar wind velocity (Vsw) and Pe are determined by HSS, which contribute ∼47\% to Pe and Vsw. Transients contribute ∼42\% of Pe in solar maxima, and ∼6\% in solar minimum. Cross-correlations of Pe with Vsw|B| for negative Bz are significant. Pe exhibits solar rotational periodicities similar to those for Vs ...
Emery, Barbara; Richardson, Ian; Evans, David; Rich, Frederick;
Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on:
YEAR: 2009   DOI: https://doi.org/10.1016/j.jastp.2008.08.005
Electron auroral energy fluxes; Solar wind speed structures; Solar cycle variations; Periodicities