Why is the weather so abnormal now? Do you all realize that?

The climate will change. In the history of the earth, there have been vicissitudes of climate change. At the coldest time, the whole ball is covered with ice and snow. We call it "Snowball Earth" or "Snow Earth". At that time, even though there were thousands of meters of ice sheets on the ocean. At the hottest time, the global temperature is higher than it is now 15 to 20 degrees. Therefore, there have indeed been colder and hotter stages in the history of the earth, but the current climate change is completely different from the previous climate change, which can be called "unprecedented". ?

At this point, China can be called the beacon of human civilization, even the only beacon. At this point, it can be called a more advanced text in western China.

Ming. Our per capita carbon emissions and historical total carbon emissions are far less than those of developed countries, especially the United States (carbon emission right is the right to development, I have long been

We are only less than America and Australia 1. Even now, our per capita is 7 tons, which is far lower than that of the United States (20 tons), and we strive to save energy.

In order to reduce carbon emissions, we make promises and keep them. We develop ecological carbon fixation technologies, such as forests, lakes, grasslands and wetlands.

Land.

First, we try to plant trees. Generations of foresters practice that no mountain is green and the water is clear. Half of the new forests in the world come from the efforts of the people of China. We strive to develop carbon sequestration technologies (carbon capture, carbon utilization and carbon sequestration) and develop green energy-saving and carbon reduction technologies.

Technically, our photovoltaic power generation monopolizes more than 80% of the world, replacing coal burning in the desert Gobi and the vast ocean. We develop electric cars and adopt

On behalf of the refueling truck, but this group of wicked pig teammates in Europe, America, Australia and Japan can't move! Biden made climate the main topic as soon as he took office, and he knew it.

Severity. What about now? How many trips has he made about the environment this year?

The high temperature this year is really extreme. Besides our mainland, North America and Western Europe are also very hot. If an area appears for a short time

Internal extreme high temperature events can be classified as weather phenomena; But if such extreme high temperature events are repeated around the world,

I have to say that this is the result of global warming.

In recent years, especially after 20 years, I personally always think that we may have entered a new era. As early as 2000, paul crutzen, the Nobel Prize winner in chemistry, mentioned that we are now in the Anthropocene, that is, human activities have surpassed.

After a natural activity. Corresponding to the Anthropocene, there is another concept called climate crisis. ?

2. UN Secretary-General Guterres called on all countries in the world to declare a state of climate crisis. Personally, I think that if we take this incident as an example,

From this, we should be in the third year of the climate crisis era.

In the past few years, we have been discussing a concept "climate critical point", that is, there is no turning back after this point, which includes

Including Greenland ice sheet, Antarctic ice sheet, boreal forest and so on. At present, all relevant articles are saying that it may be approaching now.

Or about to reach the critical point of climate. Judging from the extreme situation in the last two years, I personally think that we have crossed the critical point of climate. So combining these three concepts, we are in the state of Anthropocene and climate crisis, and we have crossed.

The critical point of climate is "why is it so hot this summer", because we may be in a brand-new era.

Third, this is because human activities burn a lot of fossil fuels and emit greenhouse gases. Judging from the previous observation data, especially in recent decades,

In 2000, the annual increase of atmospheric carbon dioxide was more than 2ppm, and it will increase by more than 200 ppm in 100, and the increase rate is on the earth.

It is almost unique in history (you can compare the atmospheric carbon dioxide concentration obtained in the Antarctic ice core in the past 800 thousand years)

Let me make an analogy. In the past, the speed was equivalent to people living 1000 years old and dying, but now the speed is equivalent to people dying in two weeks.

Go to hell. We can easily see that people will die at the age of 100. But for those who died within two weeks, most of them

A few people even want to go to the hospital to have a look, and even go to the roadside to find a fortune teller to figure out what's going on. ?

From the perspective of human civilization, the global economy, cities and population are all distributed in low-lying coastal areas, which cannot cope with climate change.

Sea level rise and extreme weather. It's different now. There was no one on the earth before, and reheating is harmful to the whole ecosystem.

The impact is very limited, but it is different now, so I think it is an "unprecedented" climate change. Recently, many countries in western Europe have broken through the high temperature of 40 degrees, which can give us some warnings. These cities in western Europe usually have the highest temperature and climate.

The average maximum temperature is about 24 degrees.

Fourth, it is equivalent to the temperature in Beijing and Shanghai, which is very mild and comfortable. Most cities in western Europe

Its layout, design and architectural style may also be based on this climate.

But the recent heat wave warns us that our future city may have to face a high temperature of 40 degrees. Many old houses in western Europe are for insurance.

Warm design, particularly thick house, poor heat dissipation and low air conditioning installation rate. Other facilities, such as the British underground, have air-conditioned lines.

The proportion is only about 40%. Therefore, our cities all over the world may have adapted to the local climate before, but can they adapt?

In view of the extreme high temperature in the future, there may be a question mark.

Of course, this is considered in the sense of weather or seasonal average. What is more noteworthy is that this big river can happen.

The twists and turns are related to global warming. Because the flow of this winding river is related to the north-south temperature gradient, it is extremely

The greater the temperature gradient between the earth and the middle and low latitudes, the more stable and straight the river is; On the contrary, it is easier to distort.

In the case of global warming, the warming range is different in different regions, and there is a phenomenon called "Arctic amplification phenomenon", which is the Arctic region.

The warming range is more than three times the global average, which weakens the temperature gradient between north and south and makes the river less stable and easy.

Swing, which in turn leads to a very strong extreme high temperature process in different regions.