What are the impacts of North America on the climate in North America?

(1) As can be seen from the figure, the west wind (①) comes from the Pacific Ocean and is blocked by Rocky Mountain B, which has limited influence on North America, so the temperate maritime climate in North America is limited to the western coastal areas of North America.

(2) The topography of North America is divided into three columns: the mountains in the west, the plains in the middle, the mountains in the east, and the plains running through the north and south in the middle of North America. Therefore, affected by the terrain, the wind from the Arctic Ocean can travel south in winter and quickly reach the coast of the Gulf of Mexico, bringing extreme weather such as severe cooling, strong winds and snowstorms to most parts of North America, causing serious disasters.

(3) As can be seen from the picture, the wind ③ comes from the Gulf of Mexico, which is warm and humid in nature and is a summer monsoon. Influenced by the topography of the central plain, the wind can freely move northward, thus causing widespread cold and warm weather in North America, making the continental characteristics of the climate in North America obvious.

(4) The most widely distributed climate type in North America is temperate continental climate; The western part of North America is a tall mountain system, the central part is a great plain, and the eastern part is a low highland, so the water vapor that brings precipitation to North America mainly comes from the A Atlantic Ocean.