Doppler Measurements of the Sun's Meridional Flow

Details Doppler Measurements of the Sun's Meridional Flow Doppler Measurements of the Sun's Meridional Flow

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...460.1027h&link_type=abstract

Astrophysical Journal v.460, p.1027

Astronomy and Astrophysics

Astronomy

103

Hydrodynamics, Sun: Activity, Sun: Interior, Sun: Oscillations

Scientific paper

Doppler velocity data obtained with the Global Oscillation Network Group (GONG) instruments in Tucson from 1992 August through 1995 April were analyzed to determine the structure and evolution of the Sun's meridional flow. Individual measurements of the flow were derived from line-of-sight velocity images averaged over 17 minutes to remove the p-mode oscillation signal. Typical flow velocities are poleward at ˜20 m s-1, but the results suggest that episodes may occur with much stronger flows. Such variations may help to explain some of the many disparate reports on the strength and structure of the Sun's meridional flow.

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