Why does it rain more in the mountains than in the plains?

The reason why there is more rain in the mountains than in the plains is mainly due to the terrain. When the warm and humid air flow is blocked by the mountain range, the air flow rises along the mountain slope, and as the altitude increases, the temperature decreases and the water vapor condenses, forming a large amount of precipitation. In contrast, plains lack the impetus for air to rise and therefore have less precipitation.

On the one hand, the temperature of the mountainous ground rises faster than that of the plain under the irradiation of sunlight, and it is easy to produce strong convective upward movement. On the other hand, warm and moist air encounters a hillside during transmission and is forced to lift into the air, causing strong convective movements. Especially on windward hillsides, the upward movement of the air is stronger and the rainfall is more abundant.

This is topographic rain, when the moist air mass advances, it encounters the obstruction of high mountains, and the airflow is forced to rise slowly, causing adiabatic cooling and condensation, and the rain formed in this way is called topographic rain. Topographic rain mostly falls on the windward slope (windward slope), while on the leeward slope, the air subsidence causes adiabatic warming, which in turn reduces cloud cover and rainfall.

Local rains are one of the three major forms of precipitation in the world. Topographic rain gets its name from the fact that it occurs in the blocking effect of the terrain. Topographic rain is precipitation formed when the humid air flow is forced to rise when it is blocked by mountains and other highlands, and the temperature decreases.

The slope of the mountain where the precipitation is formed happens to be the windward side, so the road section is the windward slope above. On the leeward side, as the air flow sinks, the temperature rises, and precipitation no longer forms. Topographic rain has an important influence on the change of local microclimate.

The three major forms of precipitation are convective rain, frontal rain, and topographic rain (including typhoon rain if the four major precipitation forms are the four major precipitation forms).

When hot air meets a mountain and goes up the hillside, it cools down, and the water vapor liquefies, changing from a gaseous state to a liquid state, forming rainfall.

Not necessarily, the mountains are too high, but the main thing is the atmospheric circulation.

Generally speaking, areas with high temperatures and humidity also have more rainfall due to the abundance of water vapor in the air. However, under similar water vapor conditions, the mountains receive much more rainfall than the plains. For example, the average annual rainfall of Huashan in Shaanxi Province is 900 mm, while the average annual rainfall in Xi'an, which is not far from Huashan and is at the same latitude, is only 580 mm. Ningbo, located on the coastal plain, has an average annual rainfall of 1,375 mm, while Huangshan, which is almost at the same latitude, has an average annual rainfall of 2,544 mm.

This shows that the amount of rainfall is not only related to the water vapor content in the air, but also depends on the strength of the air upward movement. Rain falls from the sky, and if there is no rising air to carry water vapor to the sky, there will be no condensation to form clouds and cause rain. The stronger the rotational motion, the faster and more water vapor condenses, and the greater the rainfall.

On the one hand, the temperature of the mountainous ground rises faster than that of the plain under the irradiation of sunlight, and it is easy to produce strong convective upward movement. On the other hand, warm and moist air encounters a hillside during transmission and is forced to lift into the air, causing strong convective movements. Especially in the windward hillside area, the upward movement of the air is stronger, and the rainfall is more abundant.

Therefore, there is more precipitation in the mountains than in the plains.

Precipitation in the mountains in the same area.

More than the plains, and there are two reasons for this:

The plains are low in altitude and high in temperature, and the air is relatively humid.

It is difficult to reach saturation and there is little rainfall.

The altitude of the mountains is high, the temperature is low, the relative humidity of the air is easy to saturate, and the rainfall is abundant.

2. When the warm and humid air flow of the ocean blows, the mountain area forms a windward slope, the warm and humid air flow is forced to rise and cool down, and the relative humidity is oversaturated to form rainfall.

To be precise, it is not that all places in the mountainous areas have more precipitation, but it should be that there is more precipitation in the windward areas, and there is more precipitation in the mountains as a whole than in the plains. The reason is that the terrain of the mountainous area is rugged, and the water vapor will rise along the slope when it encounters the mountain, the temperature will drop, and the water vapor will condense to form terrain rain. Most of the world's wettest places are mainly terrain.

There are two reasons why mountains receive more precipitation than plains in the same region:

The altitude of the plain is low and the temperature is high, the relative humidity of the air is difficult to reach saturation, and the rainfall is low.

The altitude of the mountains is high, the temperature is low, the air is relatively vertical, the humidity is easy to saturate, and the rainfall is abundant.

2. When the warm and humid air flow blows in the sea, the windward slope is formed in the mountains, and the warm and humid air flow is forced to rise and cool down, and the relative humidity is oversaturated to form rainfall.

It makes sense that the amount of rainfall is not only related to the water vapor content in the air, but also depends on the strength of the upward movement of the air. Rain is right.

If there is no rising air to carry water vapor to the sky, there will be no condensation to form clouds and cause rain. The stronger the upward movement, the faster and more water vapor condenses, and the greater the rainfall.

On the one hand, the temperature of the mountainous ground rises faster than that of the plain under the irradiation of sunlight, and it is easy to produce strong convective upward movement. On the other hand, warm and moist air encounters a hillside during transmission and is forced to lift into the air, causing strong convective movements. Especially on windward slopes, the upward movement of the air is stronger, and the rainfall is more abundant.

Therefore, there is more precipitation in the mountains than in the plains.

1.Precipitation on the mountainside, and it is still the most.