Along the coast of southwest Africa, a thick fog bank can often be seen over the water a short distance from?

shore. Explain why fog persists offshore along this coastline and cloudless skies dominate over land.

The "Namib Desert". ( which extends 1,200 miles along the south west coast of Africa.)

The prevailing local southwesterly winds, cooled down by the Benguela current along the west coast of South Africa, produce an inland movement of cold air, which is overlain by the warmer, lighter air. This inversion prevents the convectional rise of the cool, humid air and thus no clouds are formed The cool air does, however, regularly form a stable layer of fog, which is blown inland as far as 50 km. This coastal fog is the life-blood in the Namib Desert and is an important factor contributing to the remarkably high diversity of animal life in this extremely arid environment.

I hope this helps you.

Regards from Canada.

Warren