Analyze the oceanographic and climatic factors influencing global marine ecosystems: Assertion (A): Cold ocean currents flowing along the western coasts of continents in subtropical latitudes tend to create arid coastal deserts such as the Atacama and Namib. Reason (R): Cold currents stabilize the overlying air column, suppressing convection, cloud formation, and precipitation despite proximity to marine moisture sources. Which of the following is correct?

💡 Solution & Explanation

Cold ocean currents like the Humboldt off South America or the Benguela off southwestern Africa chill the marine air layer immediately above them, creating stable atmospheric inversion conditions that prevent convective uplift and rainfall, thereby fostering hyper-arid coastal deserts. Both statements correctly link ocean temperature anomalies with coastal aridity. This meteorological dynamic is a fundamental concept in global climatology.