Variation with optical depth log 10τ5 of the temperature in the 3D model and in the MACKKL 1D semi-empirical model of the solar atmosphere. The temperature values in the 3D snapshots resulting from the magneto-convection simulations with small-scale dynamo action by Rempel (2014), Vögler & Schüssler (2007), and the hydrodynamic simulations by Asplund et al. (2000) correspond to the horizontal averages at each optical depth τ5. Arrows mark the mean optical depths of formation log 10 ⟨ τ5 ⟩ for three wavelength points Δλ within the Si i 10 827 Å line, calculated using the ⟨ | BZ | ⟩ = 80 G 3D snapshot model.
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