Why is the western coast of South America desert while inland part same continent at latitude humid?

The western coast of South America is desert because it is located in the rain shadow of the Andes Mountains. The Andes Mountains are a major mountain range that runs along the western coast of South America. They block the moisture-carrying winds from the Pacific Ocean from reaching the western coast, resulting in a dry climate.

The inland parts of South America at the same latitude are humid because they are not located in the rain shadow of the Andes Mountains. The moisture-carrying winds from the Pacific Ocean can reach these areas, resulting in a humid climate.

Here are some additional factors that contribute to the desert climate of the western coast of South America:

* The Humboldt Current: The Humboldt Current is a cold ocean current that flows along the western coast of South America. This current helps to cool the air and prevent the formation of clouds.

* The lack of vegetation: The lack of vegetation on the western coast of South America also contributes to the desert climate. Vegetation helps to hold moisture in the soil and release it into the atmosphere. Without vegetation, the soil becomes dry and the air becomes arid.

The combination of these factors creates a desert climate on the western coast of South America.