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Reproducing the observed energy-dependent structure of Earth's electron radiation belts during storm recovery with an event-specific diffusion model
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SYSNO ASEP 0462937 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Reproducing the observed energy-dependent structure of Earth's electron radiation belts during storm recovery with an event-specific diffusion model Author(s) Ripoll, J.-F. (FR)
Reeves, G. D. (US)
Cunningham, G. S. (US)
Loridan, V. (FR)
Denton, M. (US)
Santolík, Ondřej (UFA-U) RID, ORCID
Kurth, W. S. (US)
Kletzing, C. A. (US)
Turner, D. L. (US)
Henderson, M. G. (US)
Ukhorskiy, A. Y. (US)Source Title Geophysical Research Letters. - : Wiley - ISSN 0094-8276
Roč. 43, č. 11 (2016), s. 5616-5625Number of pages 10 s. Language eng - English Country US - United States Keywords radiation belts ; slot region ; electron losses ; wave particle interactions ; hiss waves ; electron lifetimes Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects LH15304 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFA-U - RVO:68378289 UT WOS 000379851800010 EID SCOPUS 84977177416 DOI 10.1002/2016GL068869 Annotation We present dynamic simulations of energy-dependent losses in the radiation belt slot region and the formation of the two-belt structure for the quiet days after the 1 March storm. The simulations combine radial diffusion with a realistic scattering model, based data-driven spatially and temporally resolved whistler-mode hiss wave observations from the Van Allen Probes satellites. The simulations reproduce Van Allen Probes observations for all energies and L shells (2-6) including (a) the strong energy dependence to the radiation belt dynamics (b) an energy-dependent outer boundary to the inner zone that extends to higher L shells at lower energies and (c) an S-shaped energy-dependent inner boundary to the outer zone that results from the competition between diffusive radial transport and losses. We find that the characteristic energy-dependent structure of the radiation belts and slot region is dynamic and can be formed gradually in similar to 15days, although the S shape can also be reproduced by assuming equilibrium conditions. The highest-energy electrons (E>300keV) of the inner region of the outer belt (L similar to 4-5) also constantly decay, demonstrating that hiss wave scattering affects the outer belt during times of extended plasmasphere. Through these simulations, we explain the full structure in energy and L shell of the belts and the slot formation by hiss scattering during storm recovery. We show the power and complexity of looking dynamically at the effects over all energies and L shells and the need for using data-driven and event-specific conditions. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2017
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