The source of ho free radicals in the atmosphere is photodissociation of ()

The source of ho free radicals in the atmosphere is photolysis of O3.

The atmosphere is the air around the earth. Phenomenologically speaking, weather is mainly the result of moisture changes in the atmosphere. Under the combined action of solar radiation, underlying surface forcing and atmospheric circulation, the long-term comprehensive situation of weather is called climate. The influence of air pollution on the physical state of the atmosphere is mainly caused by abnormal climate changes.

Sometimes this change is obvious, sometimes it happens in the form of gradual change, which is difficult for ordinary people to detect, but if left unchecked, the consequences may be very serious.

The atmosphere refers to a thick layer of atmospheric molecules gathered around the earth, called the atmosphere. Humans, like fish living in water, live in the bottom of the earth's atmosphere and can't live without it for a moment. The atmosphere provides an ideal environment for the reproduction of life on earth and the development of human beings. Its state and changes always affect human activities and survival everywhere.

Atmospheric science is the study of the atmosphere. It studies the specific situation of the atmosphere, including its composition, distribution and change, the structure, basic properties and the motion law of the dominant state of the atmosphere.

As far as the whole earth is concerned, the closer to the core, the greater the density of constituent substances. The atmosphere is a part of the earth. Compared with the solid part of the earth, its density is much smaller than that of the solid part of the earth. The weight of the whole atmosphere is about 5× 10 to the power of 15, which is less than 1% of the total weight of the earth.

Compared with the upper and lower layers of the atmosphere, the density of the upper layer is much smaller than that of the lower layer, and the higher it is, the thinner it is. If the air density at sea level is 1, then at an altitude of 240 kilometers, the air density is only one tenth of its1000000; At an altitude of 1600 km, it is even thinner, only one tenth of it.

90% of the mass of the whole atmosphere is concentrated in the space within 16 km above sea level. Further up, when it rises to an altitude of 80 kilometers above sea level, 99.999% of the mass of the atmosphere is concentrated below this limit, while the rest of the atmosphere occupies a lot of space above this limit.