University of Michigan MHD results of the GGCM Metrics Challenge

A. J. Ridley, K. C. Hansen, G. Tóth, D. L. DeZeeuw, T. I. Gombosi, and K. G. Powell

University of Michigan, Ann Arbor, Michigan, USA

We present the University of Michigan MHD code results of the "Metrics Challenge". We have simulated the magnetospheric and ionospheric configuration during the April 16-17, 1999 CME, the December 10-11, 1998 period, and the November 5-6, 1998 time period. The simulation results were compared with DMSP cross track velocities and RMS differences were examined. We have found that the code reproduces the DMSP data quite accurately except for the sharpness of gradients and the transients which were observed. The cross polar cap potential was well matched, as was the location of the convection reversal boundary. In addition, the code reproduced features of statistical models of the ionospheric electric potential.