Namib Desert: the Namib Desert is a direct result of the Benguela Current.  

• Seamounts near to the coastline beneath the Atlantic’s surface cause the icy Benguela River to flow very close to the Namibian coast.  
• This causes a harsh coastal climate with very little rainfall. 

Atacama Desert: Cold Ocean currents contribute to the formation of coastal deserts.  

• Air blowing toward shore, chilled by contact with cold water, produces a layer of fog. This heavy fog drifts onto land.  
• The Atacama Desert, on the Pacific shores of Chile, is a coastal desert.  

• Some areas of the Atacama are often covered by fog. But the region can go decades without rainfall. In fact, the Atacama Desert is the driest place on Earth.  

Gobi Desert: Interior deserts, which are found in the heart of continents, exist because no moisture-laden winds reach them.  

• By the time air masses from coastal areas reach the interior, they have lost all their moisture. Interior deserts are sometimes called inland deserts. 
• The Gobi Desert, in China and Mongolia, lays hundreds of kilometers from the ocean. Winds that reach the Gobi have long since lost their moisture.  
• The Gobi is also in the rain shadow of the Himalaya Mountains to the south. 

Source: National Geographic Channel