H10: Solar Cycle, Dynamo

1. Science Goal and Approach Sessions • Chair(s): Komm/Hoeksema • Status: [draft] H10: Solar Cycle, Dynamo

2. S-2: Science questions and tasks • HMI science objectives: • Task 1A: Structure and dynamics of the tachocline • Task 1B: Variations in differential rotation • Task 2A: Formation and deep structure of magnetic complexes

3. S-2: Science questions and tasks • Primary scientific questions revisited, what should be changed?. Discussion points: • Meridional circulation is crucial for Dynamo (for example, return flow near tachocline): Average value, temporal variation, spatial structure, north-south asymmetry, etc. • The same list for rotation rate. • What about non-axial flows? • Improving global peakfind algorithms. • How to go deep with local helioseismic methods? • Interactions between dynamo theory and helioseismic observations

4. S-2: Science questions and tasks • Session organization: Three 15-min talks and 45 min discussion; details in posters. • Global helioseismology: results, challenges, and opportunities Rachel Howe • Local helioseismology: results, challenges, and opportunities Tom Duvall • Dynamo models. What can they do for helioseis-mology and what can observations do for them? Mark Miesch

5. S-3: Science context • What progress has already been made? • Rotation rate in convection zone and tachocline (averaged over both hemispheres) from global helioseismology • Tachocline variation in depth, latitude, and time (averaged over both hemispheres) from global helioseismology • Meridional and zonal flow in the upper convection zone from local helioseismology • Where do we expect answers before launch? • Ongoing MDI/SOHO and GONG • combined data cover about one 11-yr solar cycle • Local helioseismology methods • Where do we plan to concentrate our efforts? • Local helioseismology methods • Interaction between dynamo theory and observations

6. S-4: Implementation • What do we need to make progress on the science questions in general? • Should a TR&T focused topic be made? • Discussion point • Working groups • Local Helioseismology Comparison (LoHCo) • Observables, models, codes, resources, techniques, people … • Local/global helioseismology requirements (discussed as part of H6 and H7). • Schedules, meetings, splinters, etc. • Workshop to foster more interaction between dynamo theory and helioseismolgy.

7. A Possible Schedule for discussion • 17 November 2005: Announce the meeting, identify and advertise sessions and leaders. Request comments and suggestions on the Session Templates and the Session agenda from the session leaders and science team (respectively). • 1 December 2005: Session leaders return comments and suggestions for the Session Template to the SOC (aia-hmi_soc@quake.stanford.edu) • 15 December 2005: SOC circulates skeleton templates, agenda, and revised sessions • 9 January 2006: SOC and the Session Leaders prepare the final session agenda and identify key session participants; SOC organizes a telecon discussion of the final agenda • 6 February 2006: Pre-meeting drafts of templates circulated to teams • 13-17 February 2006: discussions during science team meeting: • implementation of the Science Plan, analysis techniques and computer codes; • additions and changes to the Science Plan; • implementation schedule, commitments and requirements; • suggestions for working groups; • request input for the Science Plan and HMI Data Analysis Pipeline from the participants. • 24 February 2005: Session Leaders send the completed Session Report (following the Template) and first draft of the updated Science Plan sections (including suggestions for the HMI Data Analysis Pipeline) to the science team; organize a discussion telecon • 6 March 2006: Session Leaders submit the final Session Report and updated Science Plan to the SOC (aia-hmi_soc@quake.stanford.edu) • 12 March 2006: a complete updated version of the HMI Science Plan is posted on meeting website; comments from the entire HMI Science Team are requested • 24 March 2006: the final updated HMI Science Plan is posted on the HMI web page