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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Explaining the dynamics of the ultra-relativistic third Van Allen radiation belt
AU - Mann, Ian R.
AU - Ozeke, L.G.
AU - Murphy, Kyle R.
AU - Clauderpierre, S. G.
AU - Turner, D. L
AU - Baker, D. N
AU - Rae, I. J.
AU - Kale, A.
AU - Milling, David
AU - Boyd, A. J.
AU - Spence, H. E.
AU - Reeves, G. D.
AU - Singer, H. J
AU - Dimitrakoudis, S.
AU - Daglis, I. A.
AU - Honary, Farideh
N1 - © 2016 Macmillan Publishers Limited, part of Springer Nature.
PY - 2016/10
Y1 - 2016/10
N2 - Since the discovery of the Van Allen radiation belts over 50 years ago, an explanation for their complete dynamics has remained elusive. Especially challenging is understanding the recently discovered ultra-relativistic third electron radiation belt. Current theory asserts that loss in the heart of the outer belt, essential to the formation of the third belt, must be controlled by high-frequency plasma wave–particle scattering into the atmosphere, via whistler mode chorus, plasmaspheric hiss, or electromagnetic ion cyclotron waves. However, this has failed to accurately reproduce the third belt. Using a data driven, time-dependent specification of ultra-low-frequency (ULF) waves we show for the first time how the third radiation belt is established as a simple, elegant consequence of storm-time extremely fast outward ULF wave transport. High-frequency wave–particle scattering loss into the atmosphere is not needed in this case. When rapid ULF wave transport coupled to a dynamic boundary is accurately specified, the sensitive dynamics controlling the enigmatic ultra-relativistic third radiation belt are naturally explained
AB - Since the discovery of the Van Allen radiation belts over 50 years ago, an explanation for their complete dynamics has remained elusive. Especially challenging is understanding the recently discovered ultra-relativistic third electron radiation belt. Current theory asserts that loss in the heart of the outer belt, essential to the formation of the third belt, must be controlled by high-frequency plasma wave–particle scattering into the atmosphere, via whistler mode chorus, plasmaspheric hiss, or electromagnetic ion cyclotron waves. However, this has failed to accurately reproduce the third belt. Using a data driven, time-dependent specification of ultra-low-frequency (ULF) waves we show for the first time how the third radiation belt is established as a simple, elegant consequence of storm-time extremely fast outward ULF wave transport. High-frequency wave–particle scattering loss into the atmosphere is not needed in this case. When rapid ULF wave transport coupled to a dynamic boundary is accurately specified, the sensitive dynamics controlling the enigmatic ultra-relativistic third radiation belt are naturally explained
U2 - 10.1038/nphys3799
DO - 10.1038/nphys3799
M3 - Journal article
VL - 12
SP - 978
EP - 983
JO - Nature Physics
JF - Nature Physics
SN - 1745-2473
IS - 10
ER -