Abstract
With the low solar heavy elements abundances published in 2004 discrepancy in sound speed profile between models and inversions became much larger than with older, higher abundances. We consider structure and source of the discrepancy. The most important source of discrepancy is shallow convection zone but making it deeper with localized opacity modifications does not lead to desired sound speed profile. Special opacity changes can produce models with sound speed profile which is close to inversion but these changes look fairly artificial. Enhanced heavy element diffusion improves agreement on He abundance but not on sound speed profile. We present solar models which include aforementioned effects or their approximations.
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