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Fig. 2

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Atmosphere regions where particle–particle collisions are faster than the gas-solid surface growth process. Shown are results for three particle collision processes for different atmosphere structures: gravitational settling (green bar), Brownian motion (red bar), turbulence (blue bar). The black line shows the cloud particle mass load (ρd/ρ) at the different pressures for all DRIFT-PHOENIX atmospheric profiles used: Teff = 1400, 1600, 1800, 2000, 2400 K, for log10(ɡ [cm s−2]) = 3.0, 5.0 (left and right, respectively). The focus is only on the cloud base (10−4 < p bar < 100). The x-axis is zoomed in to show the cloud base.

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