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We use a novel global helioseismic analysis method to infer the meridionalflow in the deep Solar interior. The method is based on the perturbation ofeigenfunctions of Solar p modes due to meridional flow. We apply this method totime series obtained from Dopplergrams measured by the Michelson Doppler Imageraboard the Solar and Heliospheric Observatory (SOHO) covering the observationperiod 2004-2010. Our results show evidence that the meridional flow reachesdown to the base of the convection zone. The flow profile has a complex spatialstructure consisting of multiple flow cells distributed in depth and latitude.Toward the Solar surface, our results are in good agreement with flowmeasurements from local helioseismology.

Global helioseismic evidence for a deeply penetrating Solar meridional flow consisting of multiple flow cells