Comparison of Kinetic Alfven Waves from Magnetotail to the Ionosphere between Global Hybrid Simulation and Observations
Abstract
We use the Auburn Global Hybrid Code in 3-D (ANGIE3D) to study the dynamics of Alfvenic waves from the magnetotail to the ionosphere and make a comparison with the observations of THEMIS and DMSP. The wave structure and the corresponding particle distribution are investigated in the simulation. Kinetic Alfven waves are observed by THEMIS in the plasma sheet, and the corresponding shear Alfvenic signatures are observed by DMSP. The shear Alfven events observed by DMSP are found to be mapped to various locations in the plasma sheet from x= -25 RE (consistent with magnetic reconnection region in our simulation) to x= -9 RE (consistent with the flow-braking region in our simulation). The Poynting flux precipitations at high latitude and low latitude are mapped to the near-tail reconnection region and the flow-braking region, respectively, while the peak energy flux is mapped to the flow-braking region. Our results show that the Poynting flux precipitation in the ionosphere obtained from the simulation corresponds to the ion auroral pattern from observations of DMSP [Wing et.al, 2013].
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMSM21C3193C
- Keywords:
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- 7835 Magnetic reconnection;
- SPACE PLASMA PHYSICS;
- 7845 Particle acceleration;
- SPACE PLASMA PHYSICS;
- 7863 Turbulence;
- SPACE PLASMA PHYSICS;
- 7867 Wave/particle interactions;
- SPACE PLASMA PHYSICS