How sandstorms are formed! Hurry up, hurry up!! Hurry, Hurry, Hurry!!

Sand duststorm is a general term for both sandstorm and duststorm, which refers to a severe sandstorm weather phenomenon in which strong winds blow up a large amount of sand and dust on the ground and roll it into the air, making the air particularly turbid and the horizontal visibility is less than 100 meters. Sandstorms refer to sandstorms formed by strong winds blowing a large amount of sand into near-surface formations. A dust storm is a storm formed by high winds that sweep large amounts of dust and other fine particles into the air.

Desert sandstorms usually come when nearby camels dig pits. You learn from camels.

Sandstorms are not like rain, especially the drizzle, it will not be because you are not prepared to immediately make the shower soaked, nor will it make you suddenly cold and sick, it is like a sensible and obedient little long-haired dog, both moisturizing, but also comfortable, but also comfortable. Therefore, although the light rain came, people still walked under it unhurriedly, or deliberately came out of the house to enjoy this wantonness, let it be drenched happily, hoping to bathe the dullness in their hearts, in order to seek a peace. Or like the fluttering pouring of pillars, although it seems to be very violent and comes very suddenly, it is also necessary for watering, and people are not too worried.

Sandstorms are also not like the snowflakes that are drifting, whether it is a small bead-like graupel snowflake, or a snowflake as big as a flocculent petal, its moisturizing and pure heart is sometimes better than the light rain, people not only do not dodge, sometimes they will call a few friends to go to the suburbs to specialize in treading the snow, even if the pearl-like hail snow hits the face in addition to cold, there will be a little faint pain; Although the six-petaled snowflakes don't hurt people's faces, their penetrating coldness can also make people shiver, and this is also a good thing to enjoy such as snowmen. These are irrelevant, but what is left is the chant of ancient and modern Chinese and foreign literati and ink writers for the sake of "Sao Ren Putting Aside the Pen Fee Commentary", which is as beautiful as the scenery of "suddenly like a night of spring breeze, thousands of trees and pear blossoms". A sandstorm is a sandstorm, it does not have the drenching of light rain, there is no poetry of snowflakes, it is worse than the wind, it makes people unstable, will sway from side to side, and will make people unable to open their eyes and see the direction clearly.

Sandstorms are really annoying and bad, they are not only harmful to people, but also damage our living environment, so no one likes sandstorms; It's not just people who don't like it, it's animals, even the tiniest animals don't like it, and of course there are no wonderful poems left for it. You see, when the sandstorm comes, except for people or animals who don't have time to hide, as long as possible, don't say that people will dodge, even animals as small as ants will immediately return to their nests, as for whether they will also close the door like people, in order to isolate the damage, in order to ensure safety, this is afraid that only experts who study biology can be clear, anyway, people have to do this. Visible sandstorms, children also know how to take precautions, invisible sandstorms may not be guarded against by everyone, and sometimes you will stray into them and do not know how to return, which is really sad!

In fact, the sandstorm raging anywhere is just a few days, close the door to prevent it, do your own thing first, the sandstorm will pass, as for its damage to the environment, as long as our people are still there, as long as our spirit does not fall, the damaged things will eventually be repaired!

There are three elements in the formation of sandstorms: strong winds and sand sources.

and unstable air.

Strong winds that are strong enough to persist are the ones that form sandstorms.

Power conditions. For example, according to observations, when a strong dust storm is formed.

When it comes, if the wind speed reaches 30 meters per second (11 magnitudes.

wind), then coarse sand (mm in diameter) will fly.

Tens of centimeters from the ground, fine sand.

diameter mm) will fly up to a height of 2 meters, silt (diameter mm) can reach.

kilometers in height, clay particles (diameter less than milli.

m) can fly to very high altitudes.

Sand source China is one of the countries with more deserts in the world, west.

Northern, North and Northeast China are deserts and sandy lands in China.

Concentrated distribution of the area, here desert and sandy area.

More than 700,000 square kilometers in the desert.

of sand dunes, according to their degree of stability, they are divided into flows.

Dunes, semi-fixed dunes, and fixed dunes. Dust storm.

When it occurs, the amount of dust raised by the mobile dunes is the highest.

Large, semi-fixed dunes are smaller, and fixed dunes are the most.

Small. Except for deserts and sandy lands, most of the northern regions of our country belong to the middle.

In arid and semi-arid latitudes, the ground is mostly sparse.

Grassland and dry farmland, sparse vegetation, plus man-made.

Destruction, when the ground warms up and thaws in the spring, the surface is bare.

Dew, when the wind rises, the sand and dust are filled, and it is local and wild.

The area where the wind passes through forms a dusty weather.

Unstable air.

Let's start with a life example. Poke the fire.

When the furnace is burning, the fire is blazing, and a slight poke will often cause the ashes to fly all over the house. And when the fire goes out.

After that, you will not raise ash when you exert more force.

Dust, which is a question of air stability.

When the fire is extinguished, there is a difference in the temperature of the air above and below the stove.

It is not large, so the air is stable. When the fire burns very strongly.

, the air near the stove is hot, and it is closer to the stove.

The air in the distance is cooler, and the hot air is lighter than the cold air and rises easily, so the air above the stove is unstable.

Definitely. In this way, the stabbed ash is easy to follow.

The hot air rises upwards and then flies all over the house.

In nature, this is also the reason why sandstorms raise sand.

If the air temperature in the lower layer is low, it is more stable.

Certainly, the dust blown by the wind will not be swept up very much.

High; If the air temperature in the lower layer is high, it is unstable and easy to move upward, and the sand and dust will be blown up when the wind blows.

Very high, forming sandstorms. Actually, our country sand.

Dust storms are usually at their peak in the mid-afternoon or mid-afternoon to late afternoon.

strong, precisely because this is the most unstable time of the day.

of the time period. In addition to the above three factors, human production activities, etc.

Factors are also important for the formation of dust storms. Such as artificial.

Destruction of vegetation, construction of industrial and mining transportation, large-scale construction.

and other damage to the earth's surface, which is the basis for the occurrence and development of sandstorms.

Offering fine sand and dust.