RAM-SCB simulations of electron transport and plasma wave scattering during the October 2012 "double-dip" storm

V K Jordanova; W Tu; Y Chen; S K Morley; A-D Panaitescu; G D Reeves; C A Kletzing

doi:10.1002/2016JA022470

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RAM-SCB simulations of electron transport and plasma wave scattering during the October 2012 "double-dip" storm

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RAM-SCB simulations of electron transport and plasma wave scattering during the October 2012 "double-dip" storm

V K Jordanova, W Tu, Y Chen, S K Morley, A-D Panaitescu, G D Reeves and C A Kletzing

Journal of geophysical research. Space physics, Vol.121(9), pp.8712-8727

09/2016

DOI: 10.1002/2016JA022470

PMCID: PMC5101868

PMID: 27867801

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Abstract

Mechanisms for electron injection, trapping, and loss in the near-Earth space environment are investigated during the October 2012 "double-dip" storm using our ring current-atmosphere interactions model with self-consistent magnetic field (RAM-SCB). Pitch angle and energy scattering are included for the first time in RAM-SCB using and magnetic local time (MLT)-dependent event-specific chorus wave models inferred from NOAA Polar-orbiting Operational Environmental Satellites (POES) and Van Allen Probes Electric and Magnetic Field Instrument Suite and Integrated Science observations. The dynamics of the source (approximately tens of keV) and seed (approximately hundreds of keV) populations of the radiation belts simulated with RAM-SCB is compared with Van Allen Probes Magnetic Electron Ion Spectrometer observations in the morning sector and with measurements from NOAA 15 satellite in the predawn and afternoon MLT sectors. We find that although the low-energy ( < 100 keV) electron fluxes are in good agreement with observations, increasing significantly by magnetospheric convection during both dips while decreasing during the intermediate recovery phase, the injection of high-energy electrons is underestimated by this mechanism throughout the storm. Local acceleration by chorus waves intensifies the electron fluxes at ≥50 keV considerably, and RAM-SCB simulations overestimate the observed trapped fluxes by more than an order of magnitude; the precipitating fluxes simulated with RAM-SCB are weaker, and their temporal and spatial evolutions agree well with POES/Medium Energy Proton and Electron Detectors data.

inner magnetosphere

geomagnetic storms

Details

Title: Subtitle: RAM-SCB simulations of electron transport and plasma wave scattering during the October 2012 "double-dip" storm
Creators: V K Jordanova - Los Alamos National Laboratory
W Tu - West Virginia University
Y Chen - Los Alamos National Laboratory
S K Morley - Los Alamos National Laboratory
A-D Panaitescu - Los Alamos National Laboratory
G D Reeves - Los Alamos National Laboratory
C A Kletzing - University of Iowa
Resource Type: Journal article
Publication Details: Journal of geophysical research. Space physics, Vol.121(9), pp.8712-8727
DOI: 10.1002/2016JA022470
PMID: 27867801
PMCID: PMC5101868
NLM abbreviation: J Geophys Res Space Phys
ISSN: 2169-9380
eISSN: 2169-9402
Grant note: DOI: 10.13039/100000015, name: U.S. Department of Energy; DOI: 10.13039/100000104, name: National Aeronautics and Space Administration, award: NNH14AX90I; DOI: 10.13039/100000104, name: National Aeronautics and Space Administration, award: NAS5-01072; DOI: 10.13039/100000001, name: National Science Foundation, award: IAA1203460; DOI: 10.13039/100000001, name: National Science Foundation, award: AGS161308
Language: English
Date published: 09/2016
Academic Unit: Physics and Astronomy
Record Identifier: 9984199661402771

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