February 25, 2021 Poster Open Access

Andrey Stejko; Alexander Kosovichev; Valery Pipin

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    <subfield code="a">Modeling Helioseismic Signatures of Meridional Circulation</subfield>
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    <subfield code="a">&lt;p&gt;We present the application of a new 3D global linearized acoustic algorithm (GALE). With the wide variance of inferred profiles of meridional circulation currently being made from similar observational data, we choose a &amp;quot;forward-modeling&amp;quot; approach to test the helioseismic signatures generated by several physics-based mean-field models of meridional velocities. We simulate the effect of realization noise in measurements in order to place a low-end baseline for whether it is possible to see the difference between single- and double-cell meridional circulation. With minimal parameter changes between the two regimes we show that it may not be possible two distinguish these profiles within the operational time-frame of HMI. We also test several other profiles in an attempt to use mean-field theory to help constrain inferences made through helioseismology inversions.&lt;/p&gt;</subfield>
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