Today, I would like to share with you the topic of knowledge about physical geography, in recent months the Earth has entered a period of volcanic activity, and the Earth seems to have entered a period of underground energy accumulation and eruption. First, on January 15, 2022, the Apai Island volcano in the South Pacific island nation of Tonga erupted, reaching a height of 30 kilometers, forming a huge umbrella cover with a diameter of 500 kilometers, which triggered a Pacific tsunami and caused some damage to the harbors along the Pacific coast. The energy emitted by this volcano is equivalent to 1000 times that of the atomic bomb explosion of Hiroshima, the crackness of the volcanic eruption is 6, and its influence cannot be ignored, and the large amount of lava ash and harmful gases such as sulfur dioxide that erupts will directly affect the global climate, which will lead to a decrease in global temperature by 0.3 ° C, and will also cause atmospheric circulation changes to affect the reduction of precipitation in the northern hemisphere, resulting in drought in some parts of the northern hemisphere, and the probability of food production reductions and other phenomena has increased greatly.
On January 28, 2022, The Sakurajima Volcano in Kagoshima, Japan, erupted again, with smoke columns reaching a height of 3,400 meters and lava and ash slipping within 2 kilometers of the crater, causing nearby villages to be covered with volcanic ash. Just in 2021, Japan's famous active volcano Mt. Fuji volcano is also in a large increase in energy accumulation, the crater increased to more than 300, an increase of 6 times more than usual, in the prelude to a large explosion the possibility of increased, underground geothermal energy accumulation, there is a possibility of eruption at any time. While people around the world are concerned about whether Mount Fuji will erupt and whether it will affect the climate in the northern hemisphere, on February 10, 2022, mount Etna, a world-famous active volcano located at an altitude of 3330 meters on the east coast of Sicily, Italy, erupted again, with a height of 10 kilometers and an eruption lasting 10 minutes, the largest since the 1992 eruption. Whether the frequency of the above three volcanic eruptions in the past month or so is so great as to prove that the Earth has entered the active period of the volcano.
Volcanic eruptions on the earth are cyclical, every few decades will be moderately large eruptions, from the history of volcanic eruptions caused by the result of the impact of changes in temperature, change the normal circulation of some atmosphere, resulting in a general drop in temperature, directly affecting the precipitation in some areas, the emergence of low temperature drought food production reduction caused by the emergence of food shortage scenarios. At the same time, it will also affect the solar activity and changes in atmospheric circulation, such as the most typical is the large eruption of Mount Tambora in Indonesia in 1815 AD, its volcanic crack reached level 8, its influence is strong, directly leading to a decrease in global temperature by 2 ° C, when there was a famous "summerless year" in the northern hemisphere, grain production was greatly reduced, summer temperatures in some areas The temperature dropped to minus a few degrees, a large number of crops were frozen to death by low temperatures, Western Europe and other countries appeared in June snowfall weather phenomenon, the mainland appeared nationwide food production reduction phenomenon. In 1991, the eruption of Mount Pinatubo in the Philippines caused the northern hemisphere to drop by 0.5 ° C, causing drought in some areas and a sharp reduction in food production and other natural disasters.
Judging from the consequences of volcanic eruptions in the above history and reality, its impact on atmospheric circulation, on temperature and precipitation, and its impact on human production and life is huge and far-reaching. Every volcanic eruption will affect human production and life, and directly or indirectly lead to major social changes in countries around the world, including catastrophic weather and the improvement of people's livelihood, especially the disasters in ancient times have a huge impact on the lives of ordinary people and will change people's life destiny. Now with the development of society, human beings' ability to resist natural disasters is constantly increasing, I believe that these disasters will not have too much impact on our lives, the global temperature will become lower, the climate will be abnormal, the weather will become cold or hotter, and even drought and food production will not be a big problem. The emergence of low temperatures and the previous global climate warming, in a sharp warming trend will cancel each other out, and eventually reach the ideal balance, I believe it will not affect our normal living standards improvement. Focus on geographical knowledge, focus on the impact of volcanic eruptions on our lives, pay attention to climate change, pay attention to the general trend of global warming.
