heat is being transferred from the ground to the air above it by conduction. Explain how this is possible.

It's a continuous process.

Explanation:

Conduction directly affects air temperature only a few centimeters into the atmosphere. During the day, sunlight heats the ground, which in turn heats the air directly above it via conduction. At night, the ground cools and the heat flows from the warmer air directly above to the cooler ground via conduction.