This globe,from the opening two-page spread of the Climate chapter,shows average annual precipitation (blue and green are highest; tan is lowest).What is the main factor causing northern Africa to have very low amounts of precipitation?
A)Trade winds
B)Westerlies
C)Downward flow of dry air in subtropics
D)Upward flow of dry air in the mid-latitudes

Question

This globe,from the opening two-page spread of the Climate chapter,shows average annual precipitation (blue and green are highest; tan is lowest).What is the main factor causing northern Africa to have very low amounts of precipitation? 
A)Trade winds 
B)Westerlies 
C)Downward flow of dry air in subtropics 
D)Upward flow of dry air in the mid-latitudes

Quizplus · Accepted Answer

Northern Africa is located in subtropical regions where there is downward flow of dry air due to the Hadley Cell circulation. This results in very low amounts of precipitation in the region.

This Globe,from the Opening Two-Page Spread of the Climate Chapter,shows