Distribution of precipitation from west to east in the United States

The distribution of precipitation in the United States is characterized by a decrease from southeast to northwest (more in the east and less in the west, more in the south and less in the north). Similar to China, the low and gentle highlands in the east have a certain impact on precipitation but not very much, and the difference between the United States and China is that the western coastal areas have more precipitation.

It gradually decreases from coastal to inland, and the magnitude of its decreasing change varies greatly from east to west. The heaviest precipitation in the United States is in the southeastern United States and along the Pacific Ocean, with more than 1,000 mm of precipitation. The areas with the least precipitation are located in the Rocky Mountains, with less than 300 mm of annual precipitation.

There are many factors that affect the distribution of precipitation, the most important being location and topography.

Distribution of precipitation in the United States

The heaviest precipitation is in the northwest of the United States, and the least is in the southwest. The northwest is about 40° north latitude and has a temperate oceanic climate, with the Pacific Ocean in the west, and the water vapor of the Pacific Ocean brought by the westerly wind belt, and because of the high and pure Cordillera Mountains in the west, there is a lot of terrain rain in the west. The lack of rain in the southwest is due to the Mediterranean climate, followed by the fact that some places are located in intermountain basins, surrounded by high mountains that block water vapor.

The distribution of precipitation in the United States decreases roughly from the east to the west. The Appalachian Mountains in the east are not as tall as the Cordillera Mountains in the west, allowing water vapor from the Atlantic Ocean to cross the mountains to the central Great Plains, bringing precipitation to the eastern foothills of the Appalachian Mountains due to their windward slopes.

The Cordillera Mountains have little precipitation due to their high terrain and inaccessibility of water vapor, but their western coastal plains are also the windward slopes of the Cordillera Mountains, forming a narrow precipitation belt.

The distribution of precipitation in the United States is characterized by a decrease from east to west, and the details are as follows:

1. Distribution characteristics:

1. Gradually decreasing from the coast to the inland areas, the amplitude of its decreasing change is very different from the east and west, the most precipitation in the United States is in the southeast of the United States and the Pacific coast, the precipitation is more than 1000 mm, the area with the least precipitation is located in the Rocky Mountains, the annual precipitation is less than 300 mm, there are many factors affecting the distribution of precipitation, the most important is location and topography. Quarrelsome.

2. The most precipitation is in the northwest of the United States, the least is in the southwest, the northwest is about 40 ° north latitude, is a temperate oceanic climate, the Pacific Ocean in the west, the water vapor of the Pacific Ocean brought by the westerly wind belt, and because of the tall Cordillera mountain system in the west, the terrain rain in the west, and the reason for the lack of rain in the southwest is that it belongs to the Mediterranean climate, followed by some places in the intermountain basin, surrounded by high mountains blocking water vapor.

Second, the distribution of reasons:

1. The distribution of precipitation in the United States decreases roughly from the east to the west, and the Appalachian Mountains in the east are not as tall as the Cordillera Mountains in the west, so that the water vapor of the Atlantic Ocean can cross the mountains to reach the central Great Plains, bringing precipitation to it.

2. The eastern foothills of the Appalachian Mountains have more precipitation due to the windward slope, while the Cordillera Mountains have less precipitation due to their high terrain and water vapor cannot reach, but the western coastal plain is also the windward slope of the Cordillera Mountains, so it forms a narrow and long precipitation belt.

Precipitation in the United States is more in the east and less in the west, decreasing from the southeast and northwest to the middle; In other words, it decreases from the southeast coast to the northwest inland, and the northwest coast has more precipitation.

b, the Appalachian Mountains in the east are close to the Atlantic Ocean, the main precipitation in the United States, so there is a lot of precipitation, and in the west, due to topographic factors, the water vapor of the Pacific Ocean cannot enter the interior, so there is less precipitation.

b The distribution of precipitation is related to the location of land and sea, and precipitation is more abundant in places close to the ocean. In addition, precipitation is closely related to the topography of the country.

It decreases from southeast to northwest, or it may increase from east to west.

b.Looking at the figure at the bottom of the People's Education Edition P87, you can know that it is decreasing from east to west, and vice versa is not increasing from west to east.

a Roughly decreasing from the south of Latan to the north.

b Decreasing roughly from east to west.

c. The big fuss caused an increase from the south to the northwest of the East Liquid Bureau.

d increases roughly from east to west.