The radiation fog is formed when the land surface cools after the sunset in the conditions of the clear sky. Thus the cooling ground cools the air above it and as a result of this the conduction causes the air temperature to fall and hence it reaches the dew point and forms a fog.
Relatively steeper than the shelf, the slope angles down to the ocean basin at an average of 4 degrees in some areas, the angle may be as much as 25 degrees.
