Forward Modeling Helioseismic Signatures of One- and Two-cell Meridional Circulation

Abstract Using a 3D global solver of the linearized Euler equations, we model acoustic oscillations over background velocity flow fields single-cell meridional circulation with deep and shallow return flows as well double-cell strong weak reversals. The velocities are generated using mean-field hydrodynamic dynamo model—moving through regimes minimal parameter changes, counterrotation near base tachocline is induced by sign inversion nondiffusive action turbulent Reynolds stresses (Λ-effect) due to radial inhomogeneity Coriolis number. By mimicking stochastic excitation resonant modes in convective interior, simulate realization noise present solar observations. deep-focusing analyze differences travel-time signatures between four regimes, comparing observations, show that current helioseismology techniques may offer important insights about location strength flow; however, it not currently be possible definitively distinguish profiles or circulation.