Geospace storm processes coupling the ring current, radiation belt and plasmasphere

Fok, M. H.; Ebihara, Yusuke; Moore, T. E.; Ober, D. M.; Keller, K. A.

doi:10.1029/159gm16

Cited by 19 publications

(33 citation statements)

References 57 publications

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“…A convection-diffusion model, namely the Radiation Belt Environment (RBE) model, has been developed to understand the radiation belt dynamics in order to predict the flux variation during active times (Fok et al, 2001(Fok et al, , 2005(Fok et al, , 2008Zheng et al, 2003). The RBE model employs time-varying, realistic magnetic field so that radial diffusion effects due to slow magnetic fluctuations and inductive radial transport owing to fast magnetic reconfiguration can be modeled.…”

Section: Introductionmentioning

confidence: 99%

Recent developments in the radiation belt environment model

Fok

Glocer

Zheng

et al. 2011

Journal of Atmospheric and Solar-Terrestrial Physics

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a b s t r a c tThe fluxes of energetic particles in the radiation belts are found to be strongly controlled by the solar wind conditions. In order to understand and predict the radiation particle intensities, we have developed a physics-based Radiation Belt Environment (RBE) model that considers the influences from the solar wind, ring current and plasmasphere. Recently, an improved calculation of wave-particle interactions has been incorporated. In particular, the model now includes cross diffusion in energy and pitch-angle. We find that the exclusion of cross diffusion could cause significant overestimation of electron flux enhancement during storm recovery. The RBE model is also connected to MHD fields so that the response of the radiation belts to fast variations in the global magnetosphere can be studied. We are able to reproduce the rapid flux increase during a substorm dipolarization on 4 September 2008. The timing is much shorter than the time scale of wave associated acceleration.Published by Elsevier Ltd.

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Section: Introductionmentioning

confidence: 99%

Recent developments in the radiation belt environment model

Fok

Glocer

Zheng

et al. 2011

Journal of Atmospheric and Solar-Terrestrial Physics

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“…The Radiation Belt Environment (RBE) model has been rigorously developed over past 10 years (Fok et al, 2005;Fok et al, 2011;Fok, Moore & Spjeldvik, 2001;Fok et al, 2008;Glocer et al, 2011;Zheng et al, 2011;. It models both the radiation belts and ring current electrons.…”

Section: The Radiation Belt Environment Model (Rbe)mentioning

confidence: 99%

“…In most of previous RBE calculations, we used empirical models of magnetic and electric fields (Fok et al, 2005;Fok et al, 2008;Zheng et al, 2003). Variations in magnetic and electric fields are drivers for radial diffusion in RBE.…”

Section: Coupling the Rbe Model With Mhd Batsrus/swmfmentioning

confidence: 99%

“…They found shortly after a substorm onset at 1900 UT, the plasmasphere ripple was propagating westward along the plasmapause. Fok et al (2005) used the combined models of the CRCM and the dynamic plasmasphere model of Ober et al (1997) to simulate this event. They were able to reproduce the observed undulation and suggested that substorm injection, shielding and convection fields all play a role.…”

Section: Crcm With Plasmasphere Model and Plasmapause Undulationsmentioning

confidence: 99%

“…In this review paper, we will describe recent progress in the modeling of the ring current/radiation belt plasma with the Comprehensive Ring Current Model (CRCM) (Fok, Wolf, Spiro & Moore, 2001) and Radiation Belt Environment model (RBE) (Fok et al, 2005;Fok, Moore & Spjeldvik, 2001;Fok et al, 2008). Both models are based on a solution of the bounce-averaged transport equation for evolution of phase space density.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of Solar Wind on the Earth Magnetosphere: Recent Progress in the Modeling of Ring Current and Radiation Belts

Buzulukova¹,

Fok²,

Glocer³

2012

Exploring the Solar Wind

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The Comprehensive Inner Magnetosphere‐Ionosphere Model

et al. 2014

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Simulation studies of the Earth's radiation belts and ring current are very useful in understanding the acceleration, transport, and loss of energetic particles. Recently, the Comprehensive Ring Current Model (CRCM) and the Radiation Belt Environment (RBE) model were merged to form a Comprehensive Inner Magnetosphere-Ionosphere (CIMI) model. CIMI solves for many essential quantities in the inner magnetosphere, including ion and electron distributions in the ring current and radiation belts, plasmaspheric density, Region 2 currents, convection potential, and precipitation in the ionosphere. It incorporates whistler mode chorus and hiss wave diffusion of energetic electrons in energy, pitch angle, and cross terms. CIMI thus represents a comprehensive model that considers the effects of the ring current and plasmasphere on the radiation belts. We have performed a CIMI simulation for the storm on 5-9 April 2010 and then compared our results with data from the Two Wide-angle Imaging Neutral-atom Spectrometers and Akebono satellites. We identify the dominant energization and loss processes for the ring current and radiation belts. We find that the interactions with the whistler mode chorus waves are the main cause of the flux increase of MeV electrons during the recovery phase of this particular storm. When a self-consistent electric field from the CRCM is used, the enhancement of MeV electrons is higher than when an empirical convection model is applied. We also demonstrate how CIMI can be a powerful tool for analyzing and interpreting data from the new Van Allen Probes mission.

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Geospace storm processes coupling the ring current, radiation belt and plasmasphere

Cited by 19 publications

References 57 publications

Recent developments in the radiation belt environment model

Recent developments in the radiation belt environment model

Impact of Solar Wind on the Earth Magnetosphere: Recent Progress in the Modeling of Ring Current and Radiation Belts

The Comprehensive Inner Magnetosphere‐Ionosphere Model

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