UV knowledge you may not know

This summer, the global high temperature, associated disasters such as drought and fire also followed, increasing energy demand, while the output of energy such as hydropower and nuclear power decreased. Agriculture, fishery and animal husbandry were greatly affected by drought and fire. production reductions to varying degrees.

According to the National Climate Center of China, it is expected that the comprehensive intensity of high-temperature weather this year may reach the strongest level since complete records began in 1961, but the current regional high-temperature process has not surpassed that of 2013.

In Europe, the World Meteorological Organization recently pointed out that July this year was included in the top three of the hottest July since meteorological records began, breaking high temperature records in many parts of the world, and many areas in Europe were affected by prolonged and intense heat waves.

The latest data from the European Drought Observatory (EDO) shows that in mid-to-late July, 47% of the European Union was in a "warning" state, and 17% of the land entered the highest level of "alert" status due to drought.

About 6 percent of the western U.S. is in extreme drought, the highest drought warning level, according to the U.S. Drought Monitor (USDM). In this state, as defined by the U.S. Drought Monitoring Agency, local crops and pastures face very heavy losses, as well as overall water shortages.


What are the causes of extreme weather? Here I would like to quote the "farmer hypothesis" and the "Archer hypothesis" in the book "three bodies" to talk about them.

Farmer hypothesis: there is a group of turkeys on a farm, and the farmer comes to feed them at 11 a.m. every day. A scientist in the turkey observed this phenomenon and observed it for nearly a year without exception. Therefore, he also discovered the great law in the universe: food comes at 11:00 every morning. It announced this law to everyone on Thanksgiving morning, but the food didn't come at 11:00 that morning. The farmer came in and killed them all.

Shooter hypothesis: there is a sharpshooter who makes a hole every 10cm on a target. Imagine that there is a two-dimensional intelligent creature living on this target. After observing their own universe, the scientists in them discovered a great law: every 10cm unit, there must be a hole. They regard the random behavior of the sharpshooter as the iron law in their own universe.

What are the causes of the global climate change? Although climatologists have done a lot of research, there is no unified explanation due to the complexity of this issue. It is generally recognized that the factors causing climate change are solar radiation, land and sea distribution, atmospheric circulation, volcanic eruptions and human activities.


What are the reasons for the warming and cooling of the earth's climate? Although climate scholars have done a lot of research, because of the complexity of this issue, there is no unified explanation. The more recognized factors that cause climate change are: solar radiation, land and sea distribution, atmospheric circulation, volcanic eruptions, and human activities.

I think that solar radiation plays a major role in the warming and cooling of the earth's climate, and solar radiation is related to the activity of the sun itself, the tilt angle of the earth's rotation and the radius of the earth's revolution, and even the orbit of the solar system around the Milky Way.

Some data show that the increase in global temperature has promoted the melting of glaciers, and at the same time, the summer monsoon has been pushed further inland, which has caused an increase in precipitation in northwest China, and finally made the climate in northwest China increasingly humid.


The Earth's climate can be divided into: the greenhouse period and the Great Ice Age. Over 85% of Earth's 4.6 billion-year history has been a greenhouse period. There were no continental glaciers on Earth during the greenhouse period, not even in the North and South Poles. Since the formation of the earth, there have been at least five major ice ages, each lasting tens of millions of years. At the height of the Great Ice Age, the Arctic and Antarctic ice sheets covered a very wide area, exceeding 30% of the total surface area. Compared with these long cycles and drastic changes in Earth's history, the climate changes that humans have experienced over thousands of years of civilization are insignificant. Compared to the movements of celestial bodies and tectonic plates, the impact of human activities on Earth's climate also looks like a drop in the ocean.

Sunspots have an active cycle of about 11 years. 2020~2024 happens to be the valley year of sunspots. Whether the climate is cooling or warming, it will bring variables to human beings, including food crises. All things grow by the sun. There are 7 kinds of visible light emitted by the sun, and the invisible light also includes ultraviolet, infrared, and various rays. Sunlight has n colors, but we can only see 7 colors with the naked eye. Of course, after sunlight is decomposed, there are also spectrums that we cannot see in sunlight: ultraviolet light (line) and infrared light (line). Ultraviolet rays can be divided into the following types according to different spectra, and different spectral effects are also different:


Regardless of the cause of global warming, it is the duty of each of us to take care of our homeland and protect our earth!

Post time: Aug-19-2022