Development of Real-Time Earth's Magnetosphere Simulator with 3-Dimensional MHD Code

Details Development of Real-Time Earth's Magnetosphere Simulator with 3-Dimensional MHD Code Development of Real-Time Earth's Magnetosphere Simulator with 3-Dimensional MHD Code

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm22a0221t&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SM22A-0221

Computer Science

Performance

2722 Forecasting, 2753 Numerical Modeling, 2784 Solar Wind/Magnetosphere Interactions, 2788 Storms And Substorms, 2794 Instruments And Techniques

Scientific paper

The super computing system is a powerful equipment to realize physical models of the Sun-Earth connection system for Space Weather forecast. Adopting the three-dimensional (3D) magneto-hydrodynamical (MHD) simulation code developed by Tanaka, we have constructed the real-time numerical simulator of interplanetary space-magnetosphere-ionosphere coupling system. By using the real-time one-minute solar wind data of a density, a flow speed and interplanetary magnetic field (IMF) from the ACE spacecraft as boundary conditions, this MHD simulation system can reproduced numerically the global structure of magnetosphere at the same time with the real world. Our real-time MHD simulator can calculate the dynamical response of the magnetosphere and can predict the timing when the geomagnetic disturbances occur and how they develop. The real-time MHD simulator have been developed by using the super computer system (SX-6) in Communications Research Labortory (CRL). To realize a real-time speed in simulations, 8 CPUs are being used adapting the newly developed HPF (High Performance Fortran) language that is an appropriate language for the calculations in multiprocessor parallel system. By now we have achieved a real-time speed in a 3D simulation of interplanetary space-magnetosphere-ionosphere coupling system with the 44x56x60 mesh size. Visualization of dynamical response of the Earth's magnetosphere is also done at the same time to numerical calculations by using RVSLIB (Real Time Visualization System Library), which is developed by NEC. This real-time MHD simulator will be run routinely on the CRL's super computer system. In this paper, we will explain the system configuration in detail and some examples will be presented to show how the geomagnetic disturbances occur responding to a solar wind change. This project will be one of the essential approaches to perform Space Weather forecast.

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