Space Weather Simulators Developed at NICT : the Solar Surface-Solar Wind Coupling Model and the Next Generation Magnetosphere-Ionosphere Coupling Model
Abstract
We report two global MHD simulators developed at NICT (National Institute of Information and Communications Technology): one is for the solar surface-solar wind coupling system and the other is for the magnetosphere-ionosphere coupling system. One important feature of our simulation model is the 3-D grid system, which has no polar singularity despite of a spherical grid configuration. By this grid system, fine grids can be allocated near the inner boundary which represents the sun or the earth. Some complicated magnetic structures on the solar surface is closely related with the solar disturbances, and in the same way the ionospheric aurora is closely related with the the magnetospheric reconfiguration processes. In views of these situation, it is very crucial for both models to achieve the simultaneous implementations for the fine grid structure on the inner boundary and the wide range grids in global configuration. For the solar surface-solar wind coupling system, the observed magnetic field data are input at the inner boundary, and the solar wind structure can be updated at every day by optimizing the simulation code. For the magnetospheric model, we are developing "the next generation" realtime MHD simulation system. The model is developed by NICT and co-workers, and the extreme phenomena such as the magnetopause crossing are simulated successfully. For the magnetic disturbance event, the westward traveling surge, the most characteristic feature of the substorm, is reproduced quite realistically. In this paper, we describe those two space weather simulator systems and represent several numerical results obtained by using these models.
- Publication:
-
40th COSPAR Scientific Assembly
- Pub Date:
- 2014
- Bibcode:
- 2014cosp...40E.682D