Radiation belt electron acceleration by chorus waves during the 17 March 2013 storm

Li, W.; Thorne, R. M.; Ma, Qianli; Ni, Binbin; Bortnik, J.; Baker, D. N.; Spence, H. E.; Reeves, G. D.; Kanekal, S.; Green, J. C.; Kletzing, C. A.; Kurth, W. S.; Hospodarsky, G. B.; Blake, J. B.; Fennell, J. F.; Claudepierre, S. G.

doi:10.1002/2014ja019945

Cited by 209 publications

(318 citation statements)

References 63 publications

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“…The March 2013 event suggests that the intense series of substorms and the associated generation of chorus waves are the mechanisms that lead to enhancement of the electron population. This is consistent with the results of Li et al (2014) and Turner et al (2014). In detail, the low µ electron population was enhanced right after the beginning of the substorm activity while a few hours later higher energy electrons reached the maximum values of PSD.…”

Section: Discussionsupporting

confidence: 92%

Combined effects of concurrent Pc5 and chorus waves on relativistic electron dynamics

Katsavrias

Daglis

et al. 2015

Ann. Geophys.

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Abstract. We present electron phase space density (PSD) calculations as well as concurrent Pc5 and chorus wave activity observations during two intense geomagnetic storms caused by interplanetary coronal mass ejections (ICMEs) resulting in contradicting net effect. We show that, during the 17 March 2013 storm, the coincident observation of chorus and relativistic electron enhancements suggests that the prolonged chorus wave activity seems to be responsible for the enhancement of the electron population in the outer radiation belt even in the presence of pronounced outward diffusion. On the other hand, the significant depletion of electrons, during the 12 September 2014 storm, coincides with long-lasting outward diffusion driven by the continuous enhanced Pc5 activity since chorus wave activity was limited both in space and time.

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Section: Discussionsupporting

confidence: 92%

Combined effects of concurrent Pc5 and chorus waves on relativistic electron dynamics

Katsavrias

Daglis

et al. 2015

Ann. Geophys.

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“…A sudden loss of outer-zone relativistic electrons can be accounted for by wave activity and inward radial motion of the magnetopause below geosynchronous orbit (Li et al, 2014b). The simulated azimuthal electric field at geostationary orbit peaked at 20 mV m −1 during the course of 15 h of increased solar wind dynamic pressure followed by rapid energization of electrons at about 18:00 UT observed by the Van Allen Probes Li et al, 2014a).…”

Section: March 2013mentioning

confidence: 94%

“…This behavior was interrupted by prompt loss of the outer zone on 17 March following the arrival of another strong CME shock, which produced a D st of −132 nT and subsequent local acceleration comparable to the 8-9 October 2012 storm (Li et al, 2014a). The role of ULF waves during this and the preceding 8-9 October 2012 storm event, which were examined globally in Hudson et al (2014a, b), is examined in more detail here, including further analysis of the magnetosonic impulse which accompanies magnetosonic compression.…”

Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamic modeling of three Van Allen Probes storms in 2012 and 2013

et al. 2015

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Abstract. Coronal mass ejection (CME)-shock compression of the dayside magnetopause has been observed to cause both prompt enhancement of radiation belt electron flux due to inward radial transport of electrons conserving their first adiabatic invariant and prompt losses which at times entirely eliminate the outer zone. Recent numerical studies suggest that enhanced ultra-low frequency (ULF) wave activity is necessary to explain electron losses deeper inside the magnetosphere than magnetopause incursion following CME-shock arrival. A combination of radial transport and magnetopause shadowing can account for losses observed at radial distances into L = 4.5, well within the computed magnetopause location. We compare ULF wave power from the Electric Field and Waves (EFW) electric field instrument on the Van Allen Probes for the 8 October 2013 storm with ULF wave power simulated using the Lyon-FedderMobarry (LFM) global magnetohydrodynamic (MHD) magnetospheric simulation code coupled to the Rice Convection Model (RCM). Two other storms with strong magnetopause compression, 8-9 October 2012 and 17-18 March 2013, are also examined. We show that the global MHD model captures the azimuthal magnetosonic impulse propagation speed and amplitude observed by the Van Allen Probes which is responsible for prompt acceleration at MeV energies reported for the 8 October 2013 storm. The simulation also captures the ULF wave power in the azimuthal component of the electric field, responsible for acceleration and radial transport of electrons, at frequencies comparable to the electron drift period. This electric field impulse has been shown to explain observations in related studies (Foster et al., 2015) of electron acceleration and drift phase bunching by the Energetic Particle, Composition, and Thermal Plasma Suite (ECT) instrument on the Van Allen Probes.

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“…Fortunately, this range does include the important domain L ∈ [4.5, 7]. This spatial domain is considered as a crucial region of MeV electron acceleration by whistler-mode waves (Chen et al 2007;Li et al 2014b). Moreover, it encompasses both GPS and geosynchronous satellite orbits where strong space weather effects could be disastrous.…”

Section: Statistical Models Of Chorus Waves Derived From Satellite Obmentioning

confidence: 99%

Oblique Whistler-Mode Waves in the Earth’s Inner Magnetosphere: Energy Distribution, Origins, and Role in Radiation Belt Dynamics

et al. 2016

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International audienceIn this paper we review recent spacecraft observations of oblique whistler-mode waves in the Earth’s inner magnetosphere as well as the various consequences of the presence of such waves for electron scattering and acceleration. In particular, we survey the statistics of occurrences and intensity of oblique chorus waves in the region of the outer radiation belt, comprised between the plasmapause and geostationary orbit, and discuss how their actual distribution may be explained by a combination of linear and non-linear generation, propagation, and damping processes. We further examine how such oblique wave populations can be included into both quasi-linear diffusion models and fully nonlinear models of wave-particle interaction. On this basis, we demonstrate that varying amounts of oblique waves can significantly change the rates of particle scattering, acceleration, and precipitation into the atmosphere during quiet times as well as in the course of a storm. Finally, we discuss possible generation mechanisms for such oblique waves in the radiation belts. We demonstrate that oblique whistler-mode chorus waves can be considered as an important ingredient of the radiation belt system and can play a key role in many aspects of wave-particle resonant interactions

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Radiation belt electron acceleration by chorus waves during the 17 March 2013 storm

Cited by 209 publications

References 63 publications

Combined effects of concurrent Pc5 and chorus waves on relativistic electron dynamics

Combined effects of concurrent Pc5 and chorus waves on relativistic electron dynamics

Magnetohydrodynamic modeling of three Van Allen Probes storms in 2012 and 2013

Oblique Whistler-Mode Waves in the Earth’s Inner Magnetosphere: Energy Distribution, Origins, and Role in Radiation Belt Dynamics

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