Extreme high temperatures have hit new highs in many areas of my country. High temperatures above 40 degrees are common, and high temperatures of 45 degrees have also developed in inland my country. If this trend continues, higher temperatures cannot be ruled out in the future.

The summer of 2022 can only be described in one word, that is - hot. Extreme high temperatures have hit new highs in many areas of my country. High temperatures above 40 degrees are common, and high temperatures of 45 degrees have also developed in inland my country. If this trend continues, higher temperatures cannot be ruled out in the future.

Therefore, the large-scale spread of high temperatures in 2022 once again tells us a problem: climate change is no longer optimistic.

Of course, our country is only a part of the world. Europe, America and other places are also developing at high temperatures. So what exactly caused it?

We have explained this problem many times, which is caused by global warming , coupled with the impact of the La Niña phenomenon in 2022, resulting in greater fluctuations in atmospheric circulation . Therefore, world climate change has also undergone fundamental changes. transformation on. However, due to the high temperature, July this year has become one of the three hottest Julys in the history of meteorological records worldwide.

Under the continuous heat wave, our country has also developed the strongest high temperature heat wave event since complete meteorological observation records were established in 1961. High temperature weather above 35°C covers 4.5 million square kilometers in my country, and more than 200 national-level observation stations have exceeded Historical extreme values ​​of maximum temperature.

Do you think this temperature is normal? It's safe to say it's completely abnormal. And under high temperatures, drought problems also arise. However, the drought situation has surprised many people. That is, there seems to be a "contrast" situation between the north and the south of our country. What is the situation? Let's look at it step by step. Moreover, such changes have also led many people to ask, is this a sign of the transition from north to south in our country? What is going on?

If the Yellow River does not dry up, the Yangtze River will dry up

Indeed, first of all, we need to explain that the amount of rainwater in the Yangtze River basin is very scarce. In mid-August, the my country Climate Center released data indicating that since June, the rainfall in the Yangtze River Basin has been 30% less than the same period in normal years (469.7 mm), second only to the 319.3 mm in 1972, which is the highest in history. The second fewest during the same period.

Since July, the precipitation in the Yangtze River Basin has been 143.2 mm, 40% less than the same period in normal years, the lowest for the same period since 1961, and the water inflow from the rivers is also 20% to 80% less than the same period in normal years.

html Since August, the precipitation in the Yangtze River Basin, Wujiang and the middle and lower reaches of the Yangtze River has been the lowest in history. The area rainfall is less than 20 mm, of which the main stream in the middle reaches is less than 10 mm. Therefore, the main stream of the Yangtze River is completely visible.

Moreover, it can also be seen from the national comprehensive meteorological drought monitoring map that a large area of ​​​​the Yangtze River Basin in my country is in a drought state. Many areas are experiencing moderate drought or severe drought. Among them, Sichuan, Anhui and other places have also experienced extreme drought. .

On the other hand, looking at the Yellow River Basin, there does not seem to be any drought problem, some are only in a state of mild drought, and the distribution range is extremely small. Therefore, this is indeed a bit surprising. The Yellow River does not dry up, but the Yangtze River does.

China’s rainfall belt moves north, are there signs of a north-south transition?

Indeed, judging from the short-term situation, there is indeed more rain in northern my country. Including July in the summer, the Northeast, North China, Northwest and other places have experienced strong rainfall, while the south is basically dominated by high temperatures.

It rains more only in South China, mainly due to the rainfall brought by typhoon , tropical disturbance and other landfalls. Therefore, it is completely the same as the climate transition between the north and the south. Why does the rainfall increase in the north? Is it true that the rainfall belt moves northward in ?

Indeed, our country has conducted a study on the development trend of rainfall in our country and published it in the "Proceedings of the National Academy of Sciences" of the United States. The changes in rainfall are related to global warming.

First of all, we need to know that the development of global warming is still continuing. In 2021, the global average temperature will be 1.11°C higher than the pre-industrial level (average from 1850 to 1900), which is the seventh warmest since complete meteorological observation records are available. In one year, even with the effect of La Niña, the warming trend still did not decrease.

The warming in Asia is also increasing. In 2021, the average land surface temperature in Asia was 0.81°C higher than the normal value (using the 1981-2010 climate reference period), which was the seventh highest value since 1901. Did you say it's getting warmer? It's definitely getting warmer.

However, this study also clearly illustrates that as long as global warming continues, rainfall in the north will fundamentally change.

Under the influence of global warming, the East Asian summer monsoon belt will move northward, bringing abundant precipitation to northern China and reversing the local drought situation since the 1970s.

Therefore, judging from the trend, it may be that China's rainfall belt will move northward. But will it really develop like this? This is indeed difficult to determine.

First of all, we cannot guarantee whether global warming will continue. Secondly, in terms of seasonal changes in summer, it is a rainy season. Therefore, in the end, it is really impossible to judge whether the rain belt will really move northward, increasing rainfall in the north and reducing it in the south.

That doesn’t mean that climate change is really a sign of the North-South transition. This may require more data support to explain the problem. Therefore, everyone can refer to it. We can only judge based on the current climate change.

However, what everyone needs to be vigilant about is that the weather this summer will be changeable - complex and extreme. But the extreme climate change in 2022 is not over, and may change drastically. What will happen?

The climate may change drastically again in 2022

Indeed, climate change in 2022 will still be very serious. In addition to the extreme climate change caused by global warming, there is also the "triple" La Niña phenomenon we call may really be coming. , NOAA, "Nature" magazine and other institutions have also issued warnings many times. Moreover, we can also see from the monitoring index of CDAS Nino 3.4 Index that the probability has indeed increased greatly.

Data shows that the key index of La Niña phenomenon has reached about -1 degree, which is a sign of obvious strengthening. Therefore, if the rare "triple" La Niña phenomenon occurs, it will inevitably bring about great climate changes. Generally speaking, under the occurrence of La Niña , our country is more likely to be affected by cold air and develop a cold wave.

As a result, extremely cold weather phenomena occur in winter. Including last year, although our country finally experienced a mild winter, at the beginning of the year, most of the central and eastern parts of our country encountered cold wave weather. The daily minimum temperatures in more than 50 cities (counties) exceeded or reached the historical extreme values ​​since the establishment of the station. This is extreme cold.

Therefore, there is no conflict between the occurrence of warm winter and extreme cold. Moreover, the climate change in 2022 will be more complicated. With the joint development of global warming and the "triple" La Niña phenomenon, the climate change in 2022 may be further amplified. Everyone needs to prepare in advance.

This is not the first time we have explained La Niña's "three consecutive strikes", but we have issued explanations many times, and the probability is increasing every time, and the trend is already clear.

Therefore, climate variability may indeed lead to more complex patterns starting from 2022, which is not a good thing for all life forms on the earth.

The extreme high temperature in 2022, just the extreme high temperature, will cause thousands of deaths. It is conceivable that under extreme climate change, the living space of human beings is constantly being breached.