1816 was called a year without summer, with snow in June and frost in July. What happened?

In May of 1816, there was frost in the northeast of the United States, and many crops were frozen to death.

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

From July to August, the river water as far south as Pennsylvania still freezes. In some places, the temperature usually reaches more than 3 degrees in summer, however, in just a few hours, the temperature actually drops to nearly degrees. There was also frost in Germany in August.

According to statistics, about 2, people in Europe died of this abnormal seasonal change in 1816. This is a very terrible dark year in human history, also known as? A year without summer? . In this year, China, which is far away from Europe, was still in Jiaqing period of Qing Dynasty. In Zhejiang, China, from January to November, there was almost no sunny day in these ten months. The reason for this season's abnormality can be traced back to 1815.

Snow in June and frost in July are related to volcanic eruption

In the southern hemisphere of the earth, Indonesia. In April 1815, Mount Tambora erupted on the Indonesian island of Sumbawa. This volcanic eruption is the largest in human history. The eruption of Tambora volcano has a great impact on the earth and completely changed human history. More than 92, people died as a result of this volcanic eruption.

The eruption power index of Tambora volcano reaches level 7. When the volcano erupts, the volume of volcanic ash ejected is 15 cubic kilometers. The stratosphere with a height of 44 kilometers. Even in London, England, you can see the sunset glow caused by volcanic ash.

Does the sulfur dioxide sprayed into the sky by Mount Tambora cause the global temperature to drop by about .4 in one or two years? .7 degrees.

This year, a large number of Europeans moved

Due to the influence of the environment in the summer-free year, a large number of Europeans may feel that their local area is an unknown place. Started a large-scale migration. Many people immigrated to the United States, including 1, British people. There are also about 2 thousand Germans who moved to the United States. In some parts of the United States, there has also been a severe cold current due to abnormal weather changes. Many Americans also began to move from the west to the east. Finally, new york, an international metropolis, was formed. From 1792 to 1812, it took 2 years for the United States to establish four new states. However, from 1816 to 1821, in just five years, six new states were established in the United States. It is this disaster that has caused the population of the United States to explode.

The distant Qing Dynasty had a great influence.

In 1816, in the 21st year of Jiaqing in Qing Dynasty, Jiaqing left an almost empty shell country because of his father's long career. Many officials in the imperial court were corrupt, and Jiaqing also wanted to take care of the Qing Dynasty, but he was unable to do so. Catch up with the natural disaster in 1816, Zhejiang has not seen a sunny day for nearly a year, and Yunnan is suffering from a large number of famines because of this environmental change. It also snows in July and August in Anhui and Jiangxi. This strange abnormal weather change accelerated the decline of the Great Qing Dynasty, which had begun to decline.