Before that, let's review the intensity and scope of this volcanic eruption. On June 65438+1October 65438+May, 2022, Tonga submarine volcano violently erupted and triggered a local tsunami. Many reports show that the explosion intensity can reach the order of 1000 Hiroshima atomic bombs.
The direct impact of this is also very huge. After the volcanic eruption, Tonga began to enter a state of "losing contact" due to the impact of communication facilities. At present, the specific economic losses and casualties are still under evaluation.
If the volcano brought the prelude, then the tsunami can be said to have opened a new prelude to the disaster in the Pacific region. The tsunami triggered by this volcanic eruption has had a great or small impact on the countries around the South Pacific and even the entire Pacific coast. The impacts include, but are not limited to, house collapse, road damage and communication interruption. ........
What can be found is that what I mentioned earlier is the fact that it has happened. These direct effects can be more or less clarified through subsequent evaluation, so stop here?
Of course not! ?
Many friends may think that the tsunami may not necessarily affect the whole world? I even wonder whether Tonga, as a small island country, will have an impact on the economy and even Zheng Zhi. What I want to say is, yes, but not because it is Tonga. Any rare volcanic eruption in history will have an impact on the whole world, no matter where it happens.
The simple logical chain can be summarized as: volcanic eruption->; Climate change->; Agriculture, economy, decision-making .....
(1) Why does volcanic eruption affect the global climate?
When a volcano erupts, it will produce a lot of volcanic ash, which often rushes out of the troposphere and reaches the stratosphere. The stratosphere, as its name implies, is calm without convection. Calm means that volcanic ash will exist stably for a long time after reaching the stratosphere (the aviation industry will be affected).
And when volcanic ash exists in the stratosphere for a long time, solar radiation will not reach the ground through the stratosphere. Therefore, the solar radiation received by the ground will drop, resulting in a relatively low temperature.
(2) What impact will volcanic eruption bring?
Theoretically, within 2~5 years after the volcanic eruption, the global temperature is about 0.3~0.5 degrees lower than normal. When the temperature drops, the corresponding crop yield will be greatly affected. When the agricultural structure changes, the corresponding economy and adaptation strategies will also change.
In a word, the eruption of Tonga volcano not only affected the local and neighboring countries, but also had a significant impact on the future global climate.