◇ The air coming in contact with the warmer ground surface is | Upsc geography
◇ The air coming in contact with the warmer ground surface is also heated because of transfer of heat (conduction of heat) from the ground surface through the molecules to the air. Since air is very poor conductor of heat and hence the transfer of heat from the ground surface through conduction is effective only upto a few metres in the lower atmosphere. The ground surface becomes colder than the air above during winter nights and thus heat is transferred from the lower portion of the atmosphere to the ground surface and thus the atmosphere is cooled.
