The 'Atacama Desert' owes its extreme aridity primarily to which of the following climatic and geographic factors?

💡 Solution & Explanation

The extreme aridity of the Atacama Desert is caused by the rainshadow effect of the towering Andes mountains, which blocks moisture-bearing winds from the Amazon basin, combined with the cold Peru or Humboldt Current offshore that stabilizes the overlying air and inhibits rainfall. Meteorological phenomena like polar monsoons do not influence this South American arid zone. It is recognized as one of the driest places on Earth, with some weather stations recording virtually no measurable precipitation historically. A related economic asset of the Atacama is its rich deposits of sodium nitrate and copper ore.