Why does the global temperature get warmer in recent years and it snows heavily in winter in southern China?

On the one hand, this is a natural law, and the hot and cold of the earth has a certain relationship with solar activity. Every 10 years or so, there will be a low tide of solar activity, and the earth will be particularly cold, just like this year.

On the other hand, as far as the specific situation is concerned, it is getting colder and colder in winter because of the greenhouse effect caused by environmental problems.

In addition, some places are sometimes hot, but some places are sometimes cold. The greenhouse effect does not mean that the temperature has been rising. In Europe, global warming will be manifested as getting hotter in summer and colder in winter.

165438+1At the end of October, European countries were hit by snowstorms and cold currents, from Britain to Poland, from Germany to Greece, all of which were affected by sudden cooling to varying degrees. Heavy snow caused traffic chaos, power failure, school closure, and some people froze to death in the cold. ...

Professor Steffen Ramsdorf of the German Institute for Climate Change told the reporter that the winter temperature in European cities can generally be 9 degrees Celsius-18 degrees Celsius higher than that in other parts of the same latitude, which is due to the warm current in the North Atlantic. It's getting colder and colder in Europe in winter because of the circulation problems of the Atlantic Ocean current.

Nowadays, scientists have found that the speed of the Atlantic Ocean current that brings warmth to Europe in winter is slowing down. 165438+1On October 30th, Harry Braddon, a scientist from ocean centre, Southampton, England, published his research results in Science magazine. In 2004, a research team led by him conducted a sampling survey between Bahamas and Canary Islands along 25 degrees north latitude to detect the salinity and density of water. Compared with the records of 1957, 198 1, 1992 and 1998, it is found that the backflow speed of deep-sea cold water has obviously decreased since 1957, especially since 65438+.

Global warming is the culprit.

The slowdown of the Atlantic ocean current means that the temperature of the North Atlantic and nearby continental plates has dropped. This is the reason why winter in Europe is getting colder and colder. What is the reason for the slowdown of the North Atlantic warm current?

According to scientists from the Hadley Center of the British Meteorological Office, the reason why the Atlantic Ocean current has changed is that the greenhouse effect caused by human beings has increased the amount of fresh water flowing to the Atlantic Ocean. Global warming has accelerated the melting of Greenland ice sheet and Arctic ice and snow, and a large amount of fresh water has been injected into the North Atlantic. The sinking speed of water is related to the salt content and density. The higher the density of salt, the faster the water sinks. Fresh water is lighter and less dense than salty sea water, and even cold water will not sink too deep. Therefore, the sinking speed of the melting ice water in the North Atlantic drops sharply, and a large amount of fresh water accumulates on the ocean surface, resulting in insufficient power to move northward, slowing down the speed, and even finally stopping.

According to the ancient meteorological records, the temperature in the north has dropped by 10 degrees in several decades due to the slowing or stopping of ocean currents. In the past ice age, the climate changed suddenly and violently because the circulation system of the Atlantic Ocean no longer operated. Scientists, including Harry Bladen, predict that if the ocean current slows down, the temperature in winter in Britain will drop by 2 degrees in the next 10 year. If the ocean current stops completely, the average temperature in northern Europe and western Europe may drop by 6 degrees or even 10 degree in the next 20 years, which is a very obvious change and will make winter extremely cold.

Scientists say that global warming does not mean that the temperature has been rising. In Europe, global warming will be manifested as getting hotter in summer and colder in winter. Some scientists believe that the earth is approaching the end of the solar warming cycle, and global warming will eventually make the earth enter the next cold period. It can be predicted that if global warming continues, the temperature in Europe will drop further, and the temperature in warm northwest Europe will be as cold as Siberia now, and this process will last for a long time.

Kuedefis, an oceanographer at the University of Hamburg, said that this phenomenon shows that "we are really changing the climate and urgently need to formulate policies to protect the environment".

It's sticky, and it's written in detail and clearly. I would like to mention that this year may be due to the arrival of the so-called La Nina, which is completely opposite to El Ni? o and will lead to a drop in temperature. These two phenomena occur every few years, but this year's La Nina is accompanied by the actual effect of global warming mentioned in the content I stood up above-it is getting hotter in summer and colder in winter, and the result is getting colder and colder, which leads to the snowfall in southern China this winter.

Please don't compare the last paragraph with the previous one. I added it myself, which is not good.