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Meridional circulation in the Active Belts

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Presentation on theme: "Meridional circulation in the Active Belts"— Presentation transcript:

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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