FG: Magnetospheric Sources of Particle Precipitation and Their Role on Electrodynamic Coupling of Magnetosphere-Ionosphere-Thermosphere Systems

The particles precipitating from the magnetosphere play an important role in the determination and modelling of ionospheric electrodynamics, especially conductance which modulates the magnetosphere’s response to the solar wind. Precipitation of magnetospheric particles and their energy deposition in the Earth’s upper atmosphere depend on a number of parameters including, but not limited to, their magnetospheric origin, energy range, flux, auroral display, spatiotemporal scale, etc. As a result, the ionospheric conductance can be modified in various ways further affecting the plasma convection, field-aligned (FAC) and ionospheric currents, and ionospheric/thermospheric temperature and densities. Therefore, understanding the properties of different sources of magnetospheric precipitation and their relative roles in the electrodynamic coupling of M-I across a broad range of spatiotemporal scales is crucial for improving predictive modelling capabilities. This broad topic necessitates the existence of a designated GEM focus group to achieve a community-wide collaboration.

🪑 Focus Group Chairs

• Doğacan Su Öztürk -- University of Alaska Fairbanks, 📨 to Doğa
  
• Dong Lin -- High Altitude Observatory, National Center for Atmospheric Research, 📨 to Dong
  
• Yiqun Yu -- Beihang University
  
• Katherine Garcia-Sage -- NASA Goddard Space Flight Center
  
• Stephen Kaeppler -- Clemson University
  

🗓 Focus Group Goals
To advance the physical knowledge and improve the numerical modelling of
- The magnetospheric particle precipitation (precipitation mechanism and characteristics, magnetospheric origin, auroral forms).
- The effects of particle precipitation on the ionospheric electrodynamics, with an emphasis on the ionospheric conductance.
- Response of the I-T system to precipitation and its feedback to the Magnetosphere.

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GEM Workshops

2022 GEM Workshop Agenda

MPEC Stand-alone session on Monday June 20, 2022, 13:30-15:00 HDT, at Bluefin

This session will focus on observational studies to address the

1. Allison Jaynes, "Rocket Missions and the Energetic Content of Pulsating Aurora"
2. Riley Troyer, "Substorm Activity as a Driver of Energetic Pulsating Aurora"
3. Mykhaylo Shumko, "The Association of Relativistic Electron Microbursts With the Aurora"
4. Jone Peter Reistad, "Origins of keV Electron Precipitation in the Summer Hemisphere Polar Cap: On the Structure and Dynamics of High Latitude Dayside Aurora"
5. Christine Gabrielse, "Estimating Precipitating Energy Flux, Average Energy, and Hall Auroral Conductance in 2D From THEMIS All-Sky-Imagers With Focus on Mesoscales"
6. Jiang Liu, "Embedded R1 and R2 Currents: a Source of Intense Precipitation, and Their Preferred Condition"
7. Harneet Sangha, "An Analysis of Region 2 Field-Aligned Current Bifurcations"

MPEC Stand-alone session on Tuesday June 21, 2022, 10:30-12:00 HDT, at Alohilani II

This session will focus on numerical studies to address the

1. Bill Lotko, TBD
2. Eftyhia Zesta, "Role of Ion Precipitation in M-I Coupling and Electron Upflow"
3. Yu Lin, "Cusp Ion Precipitation Associated with Magnetopause Reconnection Viewed from Global Hybrid Simulation"
4. Yann Pfau-Kempf, "Magnetosphere-Ionosphere Coupling in Vlasiator"
5. Maxime Grandin, "First 3D Results with Vlasiator on Auroral Proton Precipitation During Southward Interplanetary Magnetic Field Driving"
6. Shanshan Bao, "Gray-box Modeling of Particle Scattering and Auroral Precipitation"
7. Zihan Wang, "COMPASS: A New COnductance Model Based on PFISR And SWARM Satellite Observations"