How does a sky over a high-altitude, dry desert environment typically compare to one over a humid coastal area?

Answer

The desert sky appears a darker, richer blue due to lower humidity and fewer aerosols

The desert sky appears richer because it has lower humidity and fewer aerosols, leading to less scattering of light overall compared to a humid coastal area which experiences more scattering due to higher water vapor content.

How does a sky over a high-altitude, dry desert environment typically compare to one over a humid coastal area?
appearanceskyatmospherechange