18 16 is called a year without summer, with snow in June and frost in July. What happened?

18 16 in may, frost appeared in the northeastern United States, and many crops were frozen to death.

June is a hot summer. Canada and the United States have already had two heavy snows, and the snow in some areas is more than a foot thick.

From July to August, rivers as far away as southern Pennsylvania will still freeze. In some places, the temperature in summer usually reaches more than 30 degrees, however, in just a few hours, the temperature will actually drop to nearly 0 degrees. There is also frost in Germany in August.

According to statistics, in 18 16, about 200,000 people in Europe died of this abnormal seasonal change. This is a terrible dark year in human history, also known as? A year without summer? . This year, China, far away in Europe, was still in the Jiaqing period of the Qing Dynasty. Zhejiang, China, from June 65438+ 10 to June 165438+ 10, during these ten months, almost no sunny days have been seen. The reason for this season's abnormality should start with 18 15.

Frost in June and July in In the snow is related to volcanic eruption.

In the southern hemisphere of the earth, Indonesia. In April 2005, Mount Tambora erupted on the Indonesian island of Sombawa. This volcanic eruption is the biggest in human history. The eruption of Mount Tambora had a great impact on the earth and completely changed human history. More than 92,000 people died in this volcanic eruption.

The eruption power index of Tambora volcano is as high as seven. When a volcano erupts, the volume of volcanic ash ejected is 150 cubic kilometers. Stratosphere at a height of 44 kilometers. Even in London, England, you can see the sunset glow caused by volcanic ash.

Did the sulfur dioxide sprayed into the sky by Mount Tambora cause the global temperature to drop by about 0.4 in one or two years? 0.7 degrees.

This year, Europeans immigrated in large numbers.

Due to the influence of the environment without summer, a large part of Europeans may feel that their place is an unknown place. Started a large-scale migration. Many people immigrated to the United States, including100000 British. About 20,000 Germans also immigrated to the United States. Some parts of the United States have also experienced severe cold currents due to abnormal weather changes. Many Americans also began to migrate from the west to the east. Finally, new york, an international metropolis, was formed. From 1792 to 18 12, the United States established four new states in 20 years. However, from 18 16 to 182 1, in just five years, the United States has established six new states. It was this disaster that led to the explosive growth of American population.

The distant Qing dynasty also had a great influence.

18 16 years, Jiaqing in Qing dynasty was 2 1 year, and Jiaqing left an almost empty shell country because of his father's long-term career. Many officials in the imperial court were corrupt, and Jiaqing wanted to take care of the Qing Dynasty, but he was unable to do so. It also caught up with the natural disaster of 18 16. Zhejiang has never seen a sunny day in the past year, and Yunnan has suffered a lot of famine because of this environmental change. It also snows in Anhui and Jiangxi in July and August. This strange abnormal weather change accelerated the decline of the Qing Dynasty, which had begun to decline.