What impact will the subsequent volcanic eruption have?

Volcanic eruption may affect climate change.

The influence of volcanic eruption on climate is mainly related to the substances released during eruption. The first is volcanic ash, which is a kind of gravel and mineral particles with a diameter less than 2 mm sprayed into the sky. Some of them will soon fall to the ground with the wind and rain, and the other part will enter the sky and wander in the troposphere and stratosphere for many years, sometimes with a thickness of more than one kilometer.

Followed by the gas released during eruption, including sulfur dioxide, hydrogen sulfide, hydrogen chloride and hydrogen fluoride. Sulfur dioxide reacts chemically with water vapor in the atmosphere or volcano to form sulfuric acid aerosol. These sulfuric acid aerosols can also stay in the atmosphere for months to years. ?

After the violent volcanic eruption, volcanic ash and sulfuric acid aerosol cover the sky, which is called "nuclear winter" in nature. A lot of solar radiation is reflected by it, and it is difficult for heat to reach the ground.

In addition, volcanic ash is further oxidized at high altitude and can also be converted into aerosol. Aerosol particles are condensation nuclei and form ice crystals in clouds, which also leads to rainy weather in places affected by volcanic ash, and this process will absorb a lot of solar radiation. ?

It is precisely because solar radiation is reflected or absorbed in large quantities that the surface of the earth will obviously cool down after a strong volcanic eruption, and sometimes this effect will last for several years.

The cause of volcano formation

The formation of volcanoes involves a series of physical and chemical processes. At a certain temperature and pressure, the rocks in the crust and upper mantle are partially melted and separated from the parent rocks, and the molten body moves upward through pores or cracks, and gradually enriches in some parts, forming magma sacs. With the continuous supply of magma, the excess pressure of magma in the magma sac gradually increases.

When the strength of the crust cover is not enough to stop the magma from moving upward, the magma rises to the surface through the weak zone. In the process of rising, the volatiles dissolved in magma gradually dissolve out and form bubbles. When the volume fraction of bubbles exceeds 75%, the bubbles trapped in the liquid will be released quickly, leading to explosive eruption. After the gas is released, the viscosity of magma drops to a very low level and the flow becomes turbulent.

If the viscosity of magma is low or volatile matter is less, it will only overflow quietly. The difference of a series of physical and chemical processes from partial melting to eruption has formed various volcanic activities.

Refer to the above? China Meteorological Bureau-Why is the revived Agung volcano concerned? Volcanic eruption may affect climate change.