Which of the following occurs least over North America?
A) Maritime Tropical air from the North Pacific
B) Maritime Polar air from the Gulf of Alaska
C) Maritime Tropical air from the Pacific
D) Maritime Polar air from the North Atlantic
E) Arctic air from Siberia

Question

Quizplus · Accepted Answer

North America is located far enough away from the North Atlantic that maritime polar air masses from that region have less of an impact on the continent compared to other air masses like those from the Pacific or Gulf of Alaska. Additionally, the prevailing wind direction over North America is from west to east, which means that air masses from Siberia are blocked by the Rocky Mountains and tend to affect areas further south like the Midwest and Northeast.

Which of the Following Occurs Least Over North America