State of Research on the Snowball Earth Hypothesis

The current research situation of the "snowball earth hypothesis" and "snowball earth hypothesis" is also known as the "Valencia glacier" which is a hypothesis proposed by geologist Paul Hoffmann in 2001. (Wikipedia, 2002) The hypothesis is that in the new Catholic era of 540 million years ago, 1 meter of ice covered continental seas and glaciers for 100 million years. Albedo; When ice and snow reflect solar radiation into space, greenhouse gases are not present in the atmosphere, so heat is released from the earth.

The "snowball earth" hypothesis believes that the serious freezing in the late Proterozoan is ended mainly by increasing the concentration of carbon dioxide in the atmosphere from the volcano, some supporters of the snowball earth said that it is the atmospheric dioxide dioxide I believed it was originally caused by a reduction in carbon. . This assumption also warns future snow globes. During the last 100-1000 years, a dramatic increase in human activity, particularly the combustion of fossil fuels, has caused a sudden increase in atmospheric greenhouse gas concentrations and accelerations, sufficient to block the sun's heat There is evidence. The consensus theory of the scientific community states that the resulting greenhouse effect is the main reason for the increase in global warming that occurred during the same period and is the main reason for the rapid melting of the remaining glaciers and extreme ice is.

During the New Proterozoic, the temperature of glaciers covered most of the glaciers and ice sheets. This hypothesis is called "Snowball Earth", which is particularly interesting, as it began to spread from 530 to 5.40 million years ago before the Cambrian explosion. Since the Cambrian occurrence there were five extinct extinct species that could be clearly identified. Very recent mass extinction occurred about 66 million years ago. A meteorite collision may have caused extinction of dinosaurs and other large reptiles other than birds, but small animals such as mammals survived. Diversification of mammals in the past 66 million years