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2017

Energetic electron precipitation and auroral morphology at the substorm recovery phase

It is well known that auroral patterns at the substorm recovery phase are characterized by diffuse or patch structures with intensity pulsation. According to satellite measurements and simulation studies, the precipitating electrons associated with these aurorae can reach or exceed energies of a few hundreds of keV through resonant wave-particle interactions in the magnetosphere. However, because of difficulty of simultaneous measurements, the dependency of energetic electron precipitation (EEP) on auroral morphological chan ...

Oyama, S.; Kero, A.; Rodger, C.; Clilverd, M.; Miyoshi, Y.; Partamies, N.; Turunen, E.; Raita, T.; Verronen, P.; Saito, S.;

YEAR: 2017     DOI: 10.1002/2016JA023484

auroral patch; EEP; Ionosphere; plasma wave; recovery phase; substorm; Van Allen Probes

2016

Mesospheric ozone destruction by high-energy electron precipitation associated with pulsating aurora

Energetic particle precipitation into the upper atmosphere creates excess amounts of odd nitrogen and odd hydrogen. These destroy mesospheric and upper stratospheric ozone in catalytic reaction chains, either in situ at the altitude of the energy deposition or indirectly due to transport to other altitudes and latitudes. Recent statistical analysis of satellite data on mesospheric ozone reveals that the variations during energetic electron precipitation from Earth\textquoterights radiation belts can be tens of percent. Here ...

Turunen, Esa; Kero, Antti; Verronen, Pekka; Miyoshi, Yoshizumi; Oyama, Shin-Ichiro; Saito, Shinji;

YEAR: 2016     DOI: 10.1002/2016JD025015

EISCAT; electron precipitation; ion chemistry; mesosphere; ozone; pulsating aurora; Van Allen Probes



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