1. Summary of workshop on AR8210 - May 1 1998 One of the MURI candidate active regions selected for detailed study and modeling

2. Presentations Analysis of vector magnetogram data, construction of force-free fields for initial conditions (Stephane Regnier) Determining boundary velocities – detailed discussions of LCT, MEF methods (Stephane Regnier, Brian Welsch, George Fisher) Driving an MHD simulation of AR8210 with a time sequence of vector magnetogram data (Abbett) Context information about AR8210 (Yan Li, Hugh Hudson, Janet Luhmann

3. AR8210 The initial atmosphere must be specified 1. Potential field extrapolation 2. Force-free model Initial dynamic run --- uses MEF method at the photospheric boundary with an initial FFF atmosphere provided by S. Regnier:

4. MEF method (D. Longcope)

5. Toward comparison with observational data --- Calculating temperatures and emissivities a posteriori along model coronal loops (L. Lundquist) Yohkoh SXT 01 May 1998 14:01 17:57 21:12 19:40

6. needed for further AR8210 work: Extend AR8210 work to incorporate a larger part of the Sun Need better velocity determination Resolve MHD modeling issues

7. Extend AR8210 work to incorporate a larger part of the Sun  Yang Liu – Global FFF (nonlinear) model out to 2.5 R s (coarse resolution: 1  x1  resolution) [whole Sun] Regnier – Extend box to include 0 J z outside IVM FOV but inside MDI FOV. [bigger box] Explore observed dynamic connections between AR 8210 and AR 8214(?) during the time around May 1 1998.

8. Need better velocity determination o Better observations of horizontal and vertical flow morphology in eruptive magnetic configurations o Develop new ideas/algorithms for measuring/determining velocities for use in modeling real data o Better understanding and characterization of LCT, MEF methods o Survey of past efforts at imposing flows in other models

9. MHD modeling issues How to deal with high Mach number downflows How to deal with high V A and small time steps How to deal with real versus diffusive time scales Energy equation cheats to get reasonable pressure and velocity patterns from flux emergence