What causes snow to form and what causes snow to form?

Snow is formed by the direct condensation of water vapor or water droplets in the atmosphere. Because clouds are composed of small water droplets and Xiaoice crystals, when the temperature is very low, the Xiaoice crystals in the clouds will melt when they collide with each other, and freeze again, so repeated, the ice crystals will increase. When Xiaoice crystals grow to overcome the resistance and buoyancy of the air, they fall to the ground to form snow.

The snow in the north is the envy of the southerners. Every winter, the north is covered with snow. And we always have an indescribable love for snow, whether we like its cleanliness or our whiteness. So when we love it, who knows where this snow comes from?

How snow is formed.

Snow is a natural phenomenon.

It is the water that condenses in the air and then falls and becomes snow. Since the cloud is composed of small water droplets and Xiaoice crystals, when the temperature is very low, the Xiaoice crystals in the clouds will melt when they collide with each other, and bond with each other and freeze again, so repeated, the ice crystals will increase. When the Xiaoice crystals grow to overcome the resistance and buoyancy of the air, they fall to the ground, which is snow.

So snow will only be in very cold temperatures and extratropical cyclones.

will appear.

Snow forms because when water vapor meets cold air, it forms precipitation and returns to the earth's surface.

The direct condensation of water vapor in the atmosphere or the direct solidification of water droplets is snow. It can also be said that the temperature in the clouds is too low, and the small water droplets form ice crystals, and when they fall to the ground and are still snowflakes, it is snowing. When ice melts, it traps heat, so the ground air temperature is cooler than when it snows.

Where snow can fall: The climate zone is in the middle to high latitudes (i.e. about the area north of the Tropic of Capricorn), and the same is true in some of the lower latitudes in the middle mountains or plateaus above 2,000 meters above sea level.

Classification of snowfall levels:

The snowfall grade standard usually refers to the standard for continuous snowfall or snowfall converted into rainfall for a specified period of time. The standard generally uses two standards: 12 hours and 24 hours.

The 24-hour precipitation is used as the classification standard, wherein, the precipitation in millimeters is light snow, millimeters are light to moderate snow, millimeters are moderate snow, millimeters are moderate to heavy snow, millimeters are heavy snow, millimeters are heavy snow, and precipitation reaches or exceeds 10 millimeters for heavy snow.

The 12-hour precipitation is used as the classification standard, where the precipitation in millimeters is light snow, millimeters is light to moderate snow, millimeters are moderate snow, millimeters are moderate to heavy snow, millimeters are heavy snow, millimeters are heavy snow, and precipitation reaches or exceeds 10 millimeters for blizzard.

Snow forms because the atmosphere needs to contain cold ice crystal nuclei, sufficient water vapor, and air temperatures below 0.

Snow is formed by direct condensation of water vapor from the atmosphere. The low temperature in the clouds causes the water vapor to form ice crystals, and when the temperature is low enough, the ice crystals fall to the ground and are still snowflakes, which is snow.

Snow absorbs heat as it melts, so the ground air temperature will be lower when it melts than when it snows. Snow forms in the atmosphere with cold ice crystal nuclei, sufficient water vapor, and a temperature below 0.

The role of snowfall:

1. Anti-freeze and keep warm.

After snowfall, the snow on the ground is loose and porous, which can store a large amount of air and cover the land, which is conducive to heat preservation and makes crops safely through the winter.

2. It is conducive to biological growth and development.

Melted snow water contains less heavy water (heavy water has an inhibitory effect on the metabolism of organisms), 25% less than ordinary water, and contains more enzyme compounds than ordinary water, so it is conducive to the growth and development of organisms.

3. Promote the metabolism of crops.

The structural state of snow water is very different from that of ordinary water, and snow water is rarely mixed with other gases in the condensation process, and the structure is compact, very close to the biological cell fluid, and is easily absorbed by organisms. Snow water, on the other hand, stimulates enzymes, promotes metabolism and exhibits high biological activity.

4. It is a natural "fertilizer".

There are more nitrides in snow water, which is a kind of "fertilizer water", so it is always said that "Ruixue Mega Year", with the nourishment of snow water, the land can naturally give more nutrients to plants and produce more crops.

The formation of snow generally requires the following two conditions:

1.Water vapor saturation, the maximum amount of water vapor that air can contain at a certain temperature, is called water vapor saturation.

2.There must be condensation nuclei, which are very small solid particles suspended in the air, and the ideal condensation nuclei are those particles that absorb the most water, such as sulfuric acid, nitrogen and some other chemical particles.

In short, the formation of snow is inseparable from the above two necessary conditions.

Water vapor particles are cold.

The moisture in the cumulus clouds in the sky is cold and forms many tiny ice crystals, also known as ice crystal nuclei. When the ice crystal nuclei come into contact with each other and gather into relatively large ice crystals, when the ice crystals reach a certain size and reach a certain weight, they will fall from the sky. Rain is formed when the air temperature is higher during the fall.

When the temperature is lower during the fall, it becomes snow or sleet.

The composition of snowflakes is water, so the physical steps of the formation of snowflakes are: water vapor water ice.

Snow is a natural phenomenon of water or ice condensing in the air before falling. The predecessor of snow is clouds, clouds are composed of a lot of solid water, that is, Xiaoice crystals, these Xiaoice crystals in the process of contact and collision, slowly become heavier and heavier, into larger ice crystals, when the weight of ice crystals reaches a certain level, under suitable conditions, it will fall from the sky, if in the process of falling, the ice crystals will become small water droplets, this is the "rain" we often see, and if the heat is not enough to make the Xiaoice crystals become small water droplets during the falling process, then we will see snow, This is how snow is formed.

There are many small water droplets and Xiaoice crystals in the cloud, and the small beads will freeze and adhere to the surface of the Xiaoice crystals when they touch the Xiaoice crystals, and the ice crystals will increase rapidly when they collide with each other. When ice crystals are large enough to overcome air dominance and buoyancy, they fall to the ground, and this is how snow is formed.

Snow is formed by the condensation of water vapor in the atmosphere, which condenses into ice crystals at low temperatures and falls to the ground when temperatures are lower.

The wind was blowing from the Arctic.

There is a rain above, and there is no vertical on the left side of the next day.

It should be snow when the clouds hit the cold air.