Global warming, why is it getting colder and colder in Xia Yue in winter?

In recent years, extreme weather phenomena have increased. In some areas, the spring and autumn seasons have been shortened or even disappeared. It's getting hotter in summer and colder in winter.

As for "global cooling", this is not a new theory. The global cold weather of 1947-1976 once made many meteorologists exclaim that "the Little Ice Age is coming".

In the 1940s, Milankovic proposed that the earth's orbital eccentricity, ecliptic angle and precession should take 654.38+ million years, 40,000 years and 20,000 years as cycles respectively, which made the climate change of the earth at the end of Cenozoic (Quaternary) enter glacial and interglacial periods. The 1970s included deep-sea cores, coral reefs, pollen and tree rings.

1972 65438+1October 20th

Many European and American scholars who have just made great contributions to Milankovitch's theory gathered at Brown University to discuss "when and how the current interglacial period will end". After the meeting, Quaternary research (Quaternary)

Research) also published the album "The End of the Current Interglacial Period".

In the 1990s, the global climate was warming rapidly, and the greenhouse effect and global warming became the focus of international research. However, scientists have never stopped studying global cooling, and the research results supporting the "coming ice age" are published from time to time.

1997, M. E. ram yo published a paper in Paleoceanography, saying that the Holocene has been an interglacial period for 10,000 years, and if there is no human interference, the next glacial period has arrived. In June 2008, Thomas J. Coeroli, a professor of geophysics at the University of Edinburgh in the United Kingdom, summed up his research for more than 20 years. He believed that the earth was entering a new ice age and the northern hemisphere would be greatly affected. Europe, Canada and parts of Asia may be covered by permanent ice sheets, but the release of a large number of greenhouse gases seems to prevent the earth from entering this cycle. Some Russian astronomers believe that the changes in the brightness and activity of the sun have the greatest impact on the earth's climate, because the luminous intensity of the sun will gradually decrease in the next few decades.