Is it raining a lot this year? Friends in Guangdong, Fujian, Yunnan and other places may say that there are too few and many times they have not seen rain for a long time, but it is obvious that these are all minority areas. Since the beginning of this year, the floods above the warning level in China have been distributed in more than 10 provinces.
According to the Ministry of Water Resources, since the beginning of this year, affected by heavy rainfall, 71 rivers in 13 provinces in China have already experienced floods above the warning level, so the rain is actually still relatively large, but the distribution of rainfall is uneven, of which the maximum super alarm amplitude is 0.01 to 4.67 meters, and 2 rivers have super floods.
From this situation, it is obvious that this year's rain is still more extreme, not as simple as everyone thinks, the sustainable development of rain has been very clear, and next, China's rainfall will continue to develop. Of course, many people are wondering, is there really a "big flood" in 2021?
From the current situation, 71 rivers in 13 provinces in China have already seen floods above the warning level, which looks really severe, and this is still May, not even a rainy area, to the "summer" stage, is not more rain?
There is indeed this trend, but more important is the extreme weather of "polarization", for example: the Yangtze River Basin has fully entered the flood season, this year's heavy rain flood, drought may be heavier than usual, because the distribution of rainwater is uneven, we also said above, some areas have less rain, some areas are raining non-stop.
Among them, during the main flood season, it is expected that the rainwater in the Yangtze River Basin may show a spatial distribution of "less in the upper and middle reaches and more in the lower reaches", and droughts and floods coexist. Therefore, regional flooding is still possible, and during the rainy period, it is expected that the middle reaches of the Yangtze River along the river and the lower reaches, the eastern part of Dongting Lake in the middle of summer, Poyang Lake and the lower reaches of the Yangtze River may occur in stages of heavy rain and flooding disasters, and there will be heavy floods.
Not many Yangtze River basin is still good, the role of China's Three Gorges Dam is very large, even if it appears in a hundred years, once in a thousand years of rainfall, it can still be resisted, it is helpful to the downstream, so everyone does not have to worry. Including the super flood of that year, if there is a Three Gorges Dam, there is no problem of impact, because the Three Gorges Dam can achieve the control of water flow, and then carry out diversion, can control the support flow of no more than 80,000 cubic meters / second, coupled with the use of flood storage areas, it is still possible to prevent devastating disasters, so the existence of today's Three Gorges Dam obviously reduces the flood problem.
Then back to the problem of flooding, it is obvious that "regional" floods occur every year, and there are more and more extreme climatic phenomena, which will inevitably produce floods, but with the scientific and rational layout of China's ecosystem, today's floods are much less. Of course, this statement may be a little different from what many people think, since this year, China's extreme climate phenomena are more, such as typical sand, lightning, tornadoes, etc., in a short period of time performance is very obvious, this is indeed no way to deny, but in the perennial also appeared, but this year's extreme climate phenomenon is particularly obvious.
So, how to say it? Extreme weather phenomena are indeed more numerous, but the impact is much less, which is the credit for China's protection of ecosystems and reasonable avoidance of disasters. In the context of global warming, not only is there more extreme climate phenomena in China, but it is the same in the world, for example, the California wildfires in the United States are coming again, so to alleviate extreme climate phenomena, we need to fundamentally solve the problem of global warming, if "global warming" can not be solved, then it is difficult to change such climate phenomena. But now it's getting hotter and hotter every year.
In 2020, the global average temperature is already on par with 2016, and it is also a very hot state, the global average temperature is about 14.9 degrees Celsius, which is about 1.2 degrees Celsius higher than the average temperature in 1850-1900, but as global warming continues to strengthen, 2020, 2019 and 2016 are the first three high temperature years of the past 10 years, and the temperature gap between these three years is very small. So according to this trend, then 2021 may still enter the top few, you know, in 2020, we still have the Earth cooling La Niña phenomenon, which has not changed the trend of global warming, how difficult is this?
So it is true that the earth is getting hotter and hotter, not what everyone says about "cooling", many people say that the earth is going to enter the Xiaoice river period, but now who of us sees that "the earth is getting colder"? Obviously, there is no, and at the same time, some people think of solar activity, and now it is also crazy to erupt solar flares, towards the maximum period, so it is impossible to cool down, we still have to think about how to change the current climate model, otherwise the future climate phenomenon is more extreme.
Although the scientific community is now strengthening the exploration of extraterrestrial celestial bodies, saying that they want to move to Mars, but the current environment of Mars is still not suitable for survival and needs to be changed, so thinking of Mars, we are still accelerating the protection of the earth, do not want humans to wait for the day of moving to Mars to "finish", this is the general situation. The earth is the foundation of human survival, the evolution of the ecosystem has a great impact on the earth, and the survival of human beings is indispensable to the maintenance of climate, so climate is one of the most basic conditions for the survival of life on the earth.