Briefly describe the distribution law of temperature and precipitation and the influencing factors.

1. With the development of weather system, warm and humid air streams meet with cold air, which causes the warm and humid air streams to be forcibly lifted by cold air or climb from the warm and humid air streams along the front slope.

2. Local thermal convection in summer makes warm and humid air rise with strong convection, forming small cumulonimbus clouds and thunderstorms.

3. The ups and downs of the terrain make the windward slope rise forcibly, but this is a relatively minor factor. In most cases, it is combined with the first two processes and affects the geographical distribution of precipitation.

Second, the factors affecting precipitation

1, land and sea position.

2. Terrain.

3. Atmospheric circulation.

Extended data:

First, the reasons for the formation of rainfall

In the process of rising, due to the gradual decrease of ambient air pressure, volume expansion and temperature reduction, water vapor gradually becomes fine water droplets or ice crystals floating in the air to form clouds. Only when the cloud droplets are large enough to overcome the air resistance and the top support of the ascending airflow, and are not evaporated when falling, can precipitation be formed.

Water vapor molecules condense on the surface of cloud droplets, and the moving large and small cloud droplets merge, which makes cloud droplets condense (or condense) and increase. Cloud drops grow into raindrops, snowflakes or other precipitation and finally fall to the ground. Artificial rainfall is based on the principle of precipitation formation, which artificially spreads catalysts into the clouds, prompting the cloud droplets to condense, merge and increase rapidly to form precipitation.

Second, distribution.

There is a lot of precipitation near the equator, which is rainy all year round, such as Singapore.

Areas with little rain all the year round-arid desert areas, polar regions, such as Cairo.

Rainy area in summer-the east coast of the mainland near 30 ~ 40 north latitude, such as Beijing.

Rainy areas in winter-the west coast of the mainland near 30 ~ 40 north latitude, such as Rome.

Wet areas all the year round-the west coast of the mainland near 40 ~ 60 north latitude, such as London.

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