Temperature Inversion

[Proteus]

I read that in the desert, temperature inversion happens mostly on hot days. Why? The desert sand warms quickest, and so has the lowest heat capacity, so should absorb less heat than the air above it does. Why not?

 

Sand normally has a specific heat capacity of 800 joules per kelvin per kilogram. Air normally has a specific heat capacity of 1000 joules per kelvin per kilogram.