[P-EM28_29AM2] Magnetosphere-Ionosphere Coupling

[PEM28-06] Comparing the ionospheric plasma drift obtained from the global MHD simulation and that measured by SuperDARN radars

*Satoko SAITA¹, Shigeru FUJITA², Akira KADOKURA³, Takashi TANAKA⁴, Akira sessai YUKIMATU³, Yoshimasa TANAKA³, Shinichi OHTANI⁵, Ken T. MURATA⁶, Tomoyuki HIGUCHI⁷ (1.Research Organization of Information and Systems, 2.Meteorological College, 3.National Institute of Polar Research, 4.International Center for Space Weather Science and Education, Kyushu University, 5.Johns Hopkins University Applied Physics Laboratory, 6.National Institute of Information and Communications Technology, 7.The Institute of Statistical Mathematics)

Keywords:the ionospheric convection, SuperDARN, simulation

We present a parameter study of simulated processes of the magnetosphere-ionosphere (M-I) coupling using the global MHD simulation code developed by Tanaka (2010). The boundary conditions for the M-I coupling include some scaling factors. These factors are adjustable and are determined through trial and error. The main goal of this study is optimization of these scaling factors in the boundary condition by use of a data assimilation technique. In this paper, we combine the MHD simulation and solar wind parameters derived from the ACE satellite, and compare the ionospheric E x B plasma drift obtained from the global MHD simulation and that obtained from the SuperDARN HF Radar Network. References:Tanaka, T., A. Nakamizo, A. Yoshikawa, S. Fujita, H. Shinagawa, H. Shimazu, T. Kikuchi, and K. K. Hashimoto (2010), Substorm convection and current system deduced from the global simulation, J. Geophys. Res., 115, A05220, doi:10.1029/2009JA014676.