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High-resolution in situ observations of electron precipitation-causing EMIC waves

Rodger, Craig J.; Hendry, Aaron T.; Clilverd, Mark A.; Kletzing, Craig A.; Brundell, James B.; Reeves, Geoffrey D.. 2015 High-resolution in situ observations of electron precipitation-causing EMIC waves. Geophysical Research Letters, 42 (22). 9633-9641. 10.1002/2015GL066581

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Abstract/Summary

Electromagnetic ion cyclotron (EMIC) waves are thought to be important drivers of energetic electron losses from the outer radiation belt through precipitation into the atmosphere. While the theoretical possibility of pitch angle scattering-driven losses from these waves has been recognized for more than four decades, there have been limited experimental precipitation observations to support this concept. We have combined satellite-based observations of the characteristics of EMIC waves, with satellite and ground-based observations of the EMIC-induced electron precipitation. In a detailed case study, supplemented by an additional four examples, we are able to constrain for the first time the location, size, and energy range of EMIC-induced electron precipitation inferred from coincident precipitation data and relate them to the EMIC wave frequency, wave power, and ion band of the wave as measured in situ by the Van Allen Probes. These observations will better constrain modeling into the importance of EMIC wave-particle interactions.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1002/2015GL066581
Programmes: BAS Programmes > BAS Programmes 2015 > Space Weather and Atmosphere
ISSN: 00948276
Additional Keywords: radiation electron belts, EMIC waves, wave-particle interactions, energetic electron precipitation
Date made live: 15 Feb 2016 09:36 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/512961

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