Research The Effect Of Interplanetary Magnetic Field On The Earth’s Magnetosphere By Global Magnetospheric MHD Model

Magnetosphere is the outermost part of Earth’s atmosphere. It’s generated by the Earth’s magnetic field. It’s Natural barrier to protect life on Earth, increasingly profound for the study of the magnetosphere with the development of science, technology and space technology. There are two main methods for the study for magnetosphere. One is that research the magnetosphere by satellites’actual observation data. Another way is to model magnetosphere by mathematical methods. In this article, we study physical phenomena in magnetosphere by a global magnetosphere magnetohydrodynamics model. We use a model named BATS-R-US which is offered by Community Coordinated Modeling Center in the United States of America.This model (Block-Adaptive-Tree-Solar wind-Roe-Upwind-Scheme) was developed by the Computational Magnetohydrodynamics (MHD) Group at the University of Michigan, now Center for Space Environment Modeling (CSEM). After creating the magnetosphere model. We change the interplanetary magnetic field near the earth, and observe the physical quantities in the magnetosphere. When the interplanetary magnetic field southward and northward. The value is5nT, lOnT and20nT. We choose the X-Z plane to paint Pressure distribution, Magnetic field lines topology of the situation, Plasma density distribution and the speed and direction of the solar wind. Then choose the Y-Z plane and X-Z plane to paint current density. Use these maps, we try to find the different and identical between magnetosphere maps under different interplanetary magnetic field. In this way, we can learn more about the magnetosphere.