Contrast of the CCF of the band, observable with GIANO, as a function of altitude of aerosols, expressed as pressure of the cloud top. The shadowed area is spanned by the models when the temperature is varied between 1200 and 2300 K. A sharp decrease in the contrast of the CCF is caused by aerosols higher than a critical pressure. For solar water abundance, this threshold is located at about 10⁻³   bar (blue curve). For 0.1 times solar abundance, this threshold is located at about 10⁻²   bar (red curve), thus 10 times deeper in the atmosphere.