Meridional circulation in the Active Belts

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Presentation transcript:

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

Meridional circulation from GONG : yearly variation

Previous results Giles, 2000 Basu & Antia, 2003

Previous results Peter Giles Haber et al. 2002

Previous results Zhao & Kosovichev, 2004

Previous results Gizon, 2004

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

Removing the Active Regions

Before and after removing active regions

Before and after removing active regions from time-distance

Before and after removing active regions

Before and after removing active regions Time Distance Rings

Depth profile

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

Checking the averages