Recently, many cities in northern China have suffered from smog weather, which has brought many problems to people's lives.

Our environment has been seriously damaged, take the smog around us recently for example.

Since 28th of 1 month, fog and haze have appeared in the Middle East of China, with the haze area exceeding1100,000 square kilometers. The Central Meteorological Observatory issued a blue warning signal as well as a fog warning.

When there are haze and fog with low relative humidity, the relative humidity is saturated (if there are a large number of condensation nuclei, the relative humidity may be saturated if it is less than 100%).

The graphic symbols of haze weather deteriorate. Atmospheric haze with an average relative humidity of less than 80% causes blurred vision, haze causes deteriorated visibility, atmospheric haze with a relative humidity of more than 90% causes blurred vision, fog with deteriorated visibility, and atmospheric haze with a relative humidity of 80-90% causes blurred vision. Visibility is a mixture of haze and fog, but its main component is haze. The thickness of smog is relatively thick, up to 1-3 km. Haze is different from fog and clouds. There is no obvious boundary between clear sky areas, and haze particles are evenly distributed, while the particle size of dust particles is relatively small, ranging from 0.0065438 0 μ m to 65438 0 μ m, with an average diameter of about 65438 0-2 μ m. No particles suspended in the air can be seen by naked eyes. Dust, sulfuric acid, nitric acid and other particles in the smog have more scattered light with longer wavelength, so the smog is yellow or orange-gray.

There are three elements in the formation of smog: one is the physical source of dust particles. China is the largest loess plateau plain area in the world, and the soil texture is the easiest to produce dust particles. Second, because of the difference in dust. For example, the rain splashed by the garden soil in the middle of the road and the roadside or the mud flowing into the road will dry up after one hour, and the rotation of the wheels will cause a lot of dust. Even if these particles fall back to the ground, they will be thrown into the city again because of passing cars. Third, the difference in concentration between the source and movement of dust in a certain spatial range makes particles and water molecules gather into a foggy nodule. At present, there are quite a few haze structures in more than 350 prefecture-level cities in the Loess Plateau of China.

Are you aware of the composition of fog and haze? Please take out your thoughts and actions.

The environment around us has been seriously damaged. Take the smog weather in recent places for example.

Since October 28th, 65438/kloc-0, there has been a wide range of haze weather in central and eastern China, and the haze area in China has exceeded 1 10,000 square kilometers. In addition to the fog warning, the Central Meteorological Observatory also issued a blue fog warning signal.

It is because the relative humidity is not large when the smog occurs, but it is saturated in the fog (if there are a lot of condensation nuclei, the relative humidity may not reach 100%, which may lead to saturation).

Generally speaking, the visibility deterioration caused by atmospheric haze blurred vision is caused by haze when the relative humidity is less than 80%, while the visibility deterioration caused by atmospheric haze blurred vision is caused by fog when the relative humidity is more than 90%. The visibility deterioration caused by atmospheric haze blurred vision is caused by a mixture of haze and fog when the relative humidity is between 80 and 90%, but its main component is haze. The thickness of haze is relatively thick, which can reach about 1-3 km. Haze is different from fog and clouds, and there is no obvious boundary between haze and clear sky. Smog particles are evenly distributed, and the particle size is relatively small, ranging from 0.00 1 micron to 10 micron, with an average diameter of about 1-2 micron. Floating particles are invisible to the naked eye. Because the smog is composed of dust, sulfuric acid, nitric acid and other particles, the longer the scattering wavelength, the more the light ratio, so the smog looks yellow or orange-gray.

There are three elements in the formation of smog: one is the physical basic source of particulate matter. China has the largest loess plateau area in the world, and its soil texture is the easiest to produce granular dust particles. Second, poor exercise leads to dust. For example, the mud in the garden in the middle of the road and the soil on the roadside stones will flow to the road after raining or splashing water, which will produce a lot of dust after one hour of drying. Even if these particles fall back to the ground, they will be thrown over the city again because of the continuous passing of cars. Thirdly, the basic source of dust and the process of movement difference gather in a certain spatial range, and particles finally gather with water molecules to form haze. At present, in more than 350 cities in the Loess Plateau of China, the three elements of smog structure are quite rich.

What do you think after reading the composition about smog weather? Then quickly put your ideas into action.

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