In 1816, which is called "the year without summer" in history, there was frost in summer. How did this happen?

In 1816, which was called "the year without summer" in history, there was frost in summer. Because 1816 was called the year without summer, it was harmed by the eruption of Tambora volcano in Indonesia in 1815, and the temperature in the northern hemisphere map dropped widely. One of the largest volcanic eruptions in people's history prompted 1816 to become a colder year in the northern hemisphere map since 14. On the European continent, at that time, they had just finished the war against Napoleon, and they were originally welcoming the day when spring bloomed. Conclusion From June, the most basic rivers in Europe were frozen on a large scale. This cold weather also caused many food crops and livestock to die of cold, and many people could not fill their stomachs. It is estimated that about 2, people in Europe starved to death or died of cold this summer.

In China, it happened in the 21st year of Emperor Jiaqing. According to historical records, in August of the lunar calendar, "the temperature suddenly became as cold as winter". It snowed in Kunming and Southwest China for three years in winter. First frost, a serious occurrence in Northeast Heilongjiang in July of the lunar calendar; There are also records of snow in June and July of the lunar calendar in Anhui Province and Jiangxi Province. Rare first frost was recorded in Hsinchu, Miaoli and other places in Taiwan Province. The eruption of Mount Tambora is the largest volcanic eruption in human history, with the lethality of 7 on the index value of volcanic eruption. The total volume of the ejected volcanic magma is as high as 15 cubic kilometers, reaching the troposphere as high as 44 kilometers, and the sunset and hongxia caused by volcanic magma can be cleared as far away as London and new york.

It is precisely because of the magnitude of this volcanic eruption that the erupting volcanic magma covered all the earth's atmosphere. In addition, nearly 1 million tons to more than 12 million tons of sulfur dioxide were ejected from Mount Tambora, and this potassium thiocyanate gas-water solution filled the air. When it was cold, it would gradually generate mist, seriously endangering the sunlight on the earth. This kind of damage was concentrated until the summer of 1816.