Real-time global MHD simulation of the solar wind interaction with the earth’s magnetosphere

Details Real-time global MHD simulation of the solar wind interaction with the earth’s magnetosphere Real-time global MHD simulation of the solar wind interaction with the earth’s magnetosphere

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008adspr..42.1504s&link_type=abstract

Advances in Space Research, Volume 42, Issue 9, p. 1504-1509.

Computer Science

Scientific paper

We have developed a real-time global MHD (magnetohydrodynamics) simulation of the solar wind interaction with the earth’s magnetosphere. By adopting the real-time solar wind parameters and interplanetary magnetic field (IMF) observed routinely by the ACE (Advanced Composition Explorer) spacecraft, responses of the magnetosphere are calculated with MHD code. The simulation is carried out routinely on the super computer system at National Institute of Information and Communications Technology (NICT), Japan. The visualized images of the magnetic field lines around the earth, pressure distribution on the meridian plane, and the conductivity of the polar ionosphere, can be referred to on the web site (http://www2.nict.go.jp/y/y223/simulation/realtime/). The results show that various magnetospheric activities are almost reproduced qualitatively. They also give us information how geomagnetic disturbances develop in the magnetosphere in relation with the ionosphere. From the viewpoint of space weather, the real-time simulation helps us to understand the whole image in the current condition of the magnetosphere. To evaluate the simulation results, we compare the AE indices derived from the simulation and observations. The simulation and observation agree well for quiet days and isolated substorm cases in general.

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