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Global Rotation Inversions

Profile rotation vs latitude and depth Tachocline, Near-Surface Shear …. Monitor evolution during solar cycle Zonal Flows, Tachocline changes (?). Global Rotation Inversions. Global Rotation. Inversion codes exist RLS (Schou) OLA (Munk-Larsen)

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Global Rotation Inversions

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

  2. 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

  3. 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

  4. Global Rotation Inversions: Output • Rotation profile (W vs r, q) (CZ dynamics) • Errors • Averaging kernels (1 per target) (QA) • Inversion coefficients (1 set per target) (QA) • Correlation coefficients (QA) • RLS residuals (QA)

  5. 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

  6. 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!

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