Histograms of microturbulent velocities in core pixels, solid and the quiet Sun, dotted, at log (τ) = 0, a), at log (τ) = −0.9, b), and at log (τ) = −2.3, c). The dashed histogram in panel c), at log (τ) = −2.3, represents the microturbulent velocities of canopy pixels.
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