Simulating Superstorm Plasma Sources Mei-Ching Fok 1 , Thomas E. Moore 1 , Dominique C. Delcourt 2
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Simulating Superstorm Plasma Sources
Mei-Ching Fok1, Thomas E. Moore1, Dominique C. Delcourt2
Joel A. Fedder3, and Steven P. Slinker4
1NASA Goddard Space Flight Center, USA2Centre d'etude des Environnements Terrestre et Planetaires, France
3Icarus Research Inc., USA4Naval Research Laboratory, USA
SM44A-05, May 29, 20082008 Joint Assembly
Fort Lauderdale, Florida
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Superstorm on 20-21 November 2003
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Global Ion Kinetic Model
Solar Wind Parameters
LFM Event Run
Test-Particle
Model
Polar, Auroral Outflow Models
Solar Wind Particle
Distribution
Polar Wind Particle
Distribution
Auroral Wind Particle
Distribution
Comprehensive Ring Current Model (CRCM) Plasmasphere Model
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Global Ion Kinetic Model
Solar Wind Parameters
LFM Event Run
Test-Particle
Model
Polar, Auroral Outflow Models
Solar Wind Particle
Distribution
Polar Wind Particle
Distribution
Auroral Wind Particle
Distribution
Plasmaspheric Outflow Model
Comprehensive Ring Current Model (CRCM) Plasmasphere Model
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Global Ion Kinetic Model
Solar Wind Parameters
LFM Event Run
Test-Particle
Model
Polar, Auroral Outflow Models
Solar Wind Particle
Distribution
Polar Wind Particle
Distribution
Auroral Wind Particle
Distribution
Plasmaspheric Outflow Model
Plasmaspheric Wind Particle
Distribution
Comprehensive Ring Current Model (CRCM) Plasmasphere Model
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Plasmasphere Model Driven by LFM-CRCM Fields
CRCM run without plasmaspheric wind particles
CRCM run with plasmaspheric wind particles
• Plasmapause is closer to the Earth when plasmaspheric wind is not included.
• Similar plume structure and escape flux on the dayside for both cases.
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Auroral Wind:Pressure
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Polar Wind: Pressure
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Plasmaspheric Wind: Pressure
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Ring Current Total Energy
• Similar total energy: SW and AW displaced by PSW
• PSW is dominant over SW and AW
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Global Ion (H+) Energetics
• Enhances total energy
• Reduces mean energy of solar wind
• Reduces overall mean energy
• Suggests two-temperature ring current plasma
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Why Is Plasmaspheric-Wind Dominant in Ring Current?
• High PSW density at dusk local times at the CRCM boundary.
• Deep penetration of keV’s PsW particles into low L’s
Plasmaspheric Wind (PSW)
Solar Wind (SW)
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Conclusions
• Plasmaspheric wind (PSW) important, even dominant
• PsW “displaces” other sources (CRCM is self-consistent)
• But how to detect PSW (THEMIS observed PSW)?
With PSW Without PSW
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Backup Slides
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Plasmaspheric Wind: Mean Energy