Session H10: Solar Cycle, Dynamo Friday, Feb. 17, 2006 10:30 - Noon Organizers: Rudi Komm & Todd Hoeksema One of the most important SDO objective is investigation of the mechanisms of the solar cycle and dynamo. In this session we will discuss the critical issues and measurements for this objective, such as: does the solar dynamo work in the tachocline or in the whole convection zone, what is the origin of torsional oscillations, how are the interior changes related to the magnetic field patterns and evolution, what is the role of the meridional flow, and what are the critical measurements and data analyses that should be made by the SDO instruments for this investigations. To start the discussion on results, challenges and opportunities, we will have three short presentations on global and local helioseismology and dynamo theory (about 15 min each). The confirmed speakers are: Rachel Howe, Tom Duvall, and Mark Miesch. The other half of the session is reserved for open discussion. Participants are welcome to present one slide to advance the discussion. --------------------------------------------------------------- Three 15-min summaries by confirmed speakers: Rachel Howe: Global helioseismology - results, challenges, and opportunities Tom Duvall: Local helioseismology - results, challenges, and opportunities Mark Miesch: Dynamo models. What can they do for helioseismology and what can observations do for them? Remaining 45 minutes used to discuss how to make progress on major issues.