Articles | Volume 35, issue 3
Ann. Geophys., 35, 493–503, 2017
Ann. Geophys., 35, 493–503, 2017

Regular paper 28 Mar 2017

Regular paper | 28 Mar 2017

Variations in energy, flux, and brightness of pulsating aurora measured at high time resolution

Hanna Dahlgren et al.

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Pulsating aurora are ubiquitous events that constitute a large amount of energy transfer to the ionosphere. Still there are unsolved issues regarding their formation. Using high-resolution optical and radar data, we find that it is the flux of high-energy electrons that get reduced during the OFF period of the pulsations. We also report on dips in brightness at the transition between ON and OFF, and asymmetric rise and fall times, which may have implications for understanding the pulsations.