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Meridional circulation in the Active Belts

Meridional circulation in the Active Belts. I. González Hernández, S. Kholikov, R. Howe, F. Hill and R. Komm. National Solar Observatory, Tucson, AZ. Contents. Meridional circulation from GONG data Previous results Removing active longitudes Depth dependence Summary.

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Meridional circulation in the Active Belts

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  1. Meridional circulation in the Active Belts I. González Hernández, S. Kholikov, R. Howe, F. Hill and R. Komm National Solar Observatory, Tucson, AZ

  2. Contents • Meridional circulation from GONG data • Previous results • Removing active longitudes • Depth dependence • Summary

  3. Meridional circulation from GONG : yearly variation

  4. Previous results Giles, 2000 Basu & Antia, 2003

  5. Previous results Peter Giles Haber et al. 2002

  6. Previous results Zhao & Kosovichev, 2004

  7. Previous results Gizon, 2004

  8. Previous results Komm et al., 2004 & 2005 Zaatri et al., 2006 Chou, 2007

  9. Removing the Active Regions

  10. Before and after removing active regions

  11. Before and after removing active regions from time-distance

  12. Before and after removing active regions

  13. Before and after removing active regions Time Distance Rings

  14. Depth profile

  15. Summary • 6 continuous years of GONG meridional circulation confirm previous results showing “extra circulation” in active belts. • Removing active longitudes. • global circulation pattern in the active belt • inflows that plays a role in active region production • Time-distance validation --> Work in progress

  16. Checking the averages

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