Talk abstract details

We use Fourier-Hankel decomposition as suggested earlier by Braun & Fan (1998) to estimate the frequency difference caused by the horizontal meridional flow between waves that propagate polewards and equatorwards.
These frequency shifts are used to determine the meridional flow profile as a function of depth and latitude by a SOLA inversion method.
Decomposing the seismic wave field in a large patch we are able to probe a large fraction of the solar convection zone for the meridional flow.
Analysing smaller patches We are able to compare our findings to results obtained from Ring-Diagram analysis.