-6 1℃! Antarctica has experienced the coldest winter in history. Is the Great Ice Age really coming?
Prior to this, the coldest winter temperature in Antarctica was -60.6 degrees Celsius in 1976. In the past 30 years, due to global warming, the Antarctic winter has actually been in a state of continuous warming. This time, it is 2.5 degrees Celsius lower than the average temperature in the past 30 years.
In the 1970s, when the greenhouse effect appeared on the earth and the ozone hole began to appear over Antarctica, some researchers pointed out that the interglacial period of the earth was coming to an end and the earth would soon start to get cold.
Samatov, a Russian scientist, also published a paper in 2007, arguing that the earth will usher in a new ice age in 20041year, and at the same time, the earth may enter the coldest period in 2060.
But in the past few years, because the overall temperature of the earth is rising and the polar glaciers are melting faster and faster, the view that the earth is actually cooling is gradually considered wrong.
Of course, even though global warming has become the mainstream, some researchers still say that the main cause of global warming has little to do with human beings, but with the periodic changes of the earth. The intensity of solar radiation and the movement inside the earth will lead to the change of the earth's climate. After all, before the industrial revolution, the earth actually appeared alternately in warm periods and cold periods.
Through the study of oxygen isotope in Greenland ice core, some researchers pointed out that the climate change of the earth has a periodic law of 6.5438+million years, in which every warm period of 6.5438+million years will enter a cold period of 90,000 years.
As we all know, modern scientific research believes that the last ice age on earth ended about 1 000 years ago. In the past 1000 years, the earth was in a relatively warm period, especially 1000 years ago. At that time, the northeast of China was in a warm and humid climate.
If the researchers believe that the earth is a climate change cycle every 654.38+ million years, then the earth is really slowly entering a new round of ice age, but now the periodic change of the earth's climate is disrupted by the emission of greenhouse gases, which makes people feel as if the earth is warming continuously.
At present, the mainstream view still holds that the earth is warming, that is, the greenhouse effect caused by human activities is still continuing.
Take this year's southern hemisphere as an example. In fact, since the winter in the southern hemisphere, abnormal low temperature weather has appeared in many places in the southern hemisphere, and the equatorial region has also begun to drop sharply. These are also considered to be the beginning of a new ice age on earth.
However, researchers believe that this is actually an abnormal climate caused by global warming, because when the earth's climate is about to collapse, this extremely abnormal weather will become very common.
For example, the northern hemisphere experienced terrible extreme heat this year. In addition, before the end of this century, a new climate will form in the Arctic, and there will be no ice in the Arctic in spring and summer.
Therefore, although the lowest temperature in Antarctica was recorded this time, researchers still believe that this is not a sign of the earth cooling, but a new signal to human beings, reminding them to find a way to restore climate balance as soon as possible, otherwise it may become more serious.
After research, this is actually related to the strong polar vortex in the stratosphere in the southern hemisphere in winter. Because of the high-speed airflow, cold air stagnated over the Antarctic, resulting in the lowest temperature in the Antarctic.
Just like this summer, a "hot dome" appeared at high altitude in North America, which made it impossible for cold air masses to enter, leading to extreme temperature rise. Belongs to the extreme weather of the earth.
In addition, the researchers said that the expanding ozone hole over Antarctica may also be the reason for the historic low temperature in Antarctica this year, because the expansion of the ozone hole will further strengthen the activity of polar vortex, thus forming a vicious circle. Simply put, the appearance of polar vortex will accelerate ozone consumption, thus making the ozone hole problem more and more serious.
Naturally, whether the earth is getting colder or warmer, the lowest temperature in Antarctica this time will not be good news. Winter in Antarctica this year is indeed colder than in previous years.
But if this happens only this year, it doesn't really mean anything, and it can't be used as evidence that the earth is getting cold, because from the overall development situation, the Antarctic glaciers are still melting and the earth is still heating up.