Global Rotation Inversions Profile rotation vs latitude and depth Tachocline, Near-Surface Shear … Monitor evolution during solar cycle Zonal Flows, Tachocline.

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Presentation transcript:

Global Rotation Inversions Profile rotation vs latitude and depth Tachocline, Near-Surface Shear … Monitor evolution during solar cycle Zonal Flows, Tachocline changes (?)

Global Rotation Inversion codes exist – RLS (Schou) –OLA (Munk-Larsen) Models exist, but may need improving for high-degree modes Need strategy to pick best regularization

Global Rotation Inversions Input (for each 72d or 108d [or whatever] spectrum): –Frequencies –Odd a-coefficients or splittings (up to say l=400??) – what peakfinding code? –Errors –Eigenfunctions (from model) –Regularization choice (standard or adaptive?) –Near-surface results from local helioseismology

Global Rotation Inversions: Output Rotation profile (  vs r,  (CZ dynamics  Errors Averaging kernels (1 per target) (QA) Inversion coefficients (1 set per target) (QA) Correlation coefficients (QA) RLS residuals (QA)

Global Rotation Inversions -- extras More than one inversion code (OLA?) Custom inversions – web interface –RLS inversions already ‘cheap’, ought to be doable on laptop by 2006! –Allow user to select regularization trim mode set Cumulative flow plots, movies Implement something similar for GONG DSDS

Time Required Incorporating local-helioseismology results: 6mths Investigate adaptive regularization: 2 months Develop scripts and data formats to automate inversions for MDI : 1 month LAUNCH Adapt to HMI data: 1 month Cross-validate HMI results: 2 months Solve the mystery of the solar cycle: priceless!

Local Mode Parameters Use magnetic parameter changes from ring diagrams to probe near-surface structure, fields. ‘Back out’ magnetic effects to get frequencies for global structure inversions Input: Ring-diagram parameters Output: Structure info.