Is the cold air rising or sinking?

Cold air refers to the air that causes the temperature to drop there. Cold air and warm air are defined by the horizontal difference of temperature. The distant Arctic Ocean and cold Siberia are the cradles of cold air.

Most cold air masses are formed in the polar regions and Siberia, with a range of thousands of kilometers and a thickness of several kilometers to dozens of kilometers. Cold air crossing the border will bring rain and snow. , will make the temperature plummet. The intensity of each cold air intrusion is different, strong or weak, and the cooling rate is also more or less.

Cold air, such as tidal surge, affects a wide range, reaching more than 2000 kilometers. Because the moving path is different, the influence area is also different. The time and scope will also be different.

The influence of cold air

1, cooling: When cold air moves to an area, it will bring lower temperature, leading to a drop in temperature. This will make the environment cold and may cause low-temperature disasters, such as freezing injury and low-temperature freezing injury.

2, weather changes: cold air is often accompanied by weather changes. The arrival of cold air may cause showers, snowstorms, hail and other precipitation phenomena, and it is often accompanied by extreme weather conditions such as strong winds and lightning.

3. Increase in wind speed: The flow of cold air will often increase the speed of air flow, leading to an increase in wind speed. Strong winds will bring gusts, strong winds or hurricanes, which will bring inconvenience and even danger to people's lives and traffic.

4, air humidity reduction: the relative humidity in cold air is usually low, when cold air flows through an area, it will take away some water, resulting in air humidity reduction. This may lead to dry climatic conditions, affecting plant growth and soil moisture.

5. Change air quality: Cold air is generally fresh, which can effectively purify pollutants in the air and improve air quality. However, in some specific cases, cold air may also bring about the diffusion or accumulation of pollutants, which will adversely affect air quality.

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