Global warming, sea level rise alarm bells sounded again, and humans have really not had much time to change the earth's climate. If this state continues, the climate chain effect faced by humans in the future will be "stronger".

Global warming , Sea level rise alarm bell sounds again, humans really don’t have much time to change the earth’s climate. If this state continues, the climate chain effect faced by humans in the future will be “stronger”.

, "Nature " magazine once again published a crisis description about sea level rise. The crisis under climate evolution is a "trend", and this time it is a crisis description under Antarctic glaciers.

I have to say that the whole world should be vigilant. As one of the most sensitive areas for global warming, if all Antarctic glaciers melt, the impact on my country's sea level rise will inevitably exist.

So, if all the Antarctic glaciers melt, where is the biggest crisis in our country's offshore and where will the city be submerged? Let’s explain it step by step.

Antarctic heats up sharply

We said that the entire earth is under warming, so the heating of Antarctic is also an inevitable trend. In 2022, we have also seen a severe warming phenomenon of Antarctica.

At the beginning of the year, many weather stations in Antarctica were heating up by nearly 40 degrees! Yes, you read it right, and the thermometer is not wrong. The temperature monitoring of Kunlun Station in Antarctica in my country has also discovered that Antarctica has an unusual climate in 2022, with the temperature increase of 38.1℃ within 4 days, and the temperature reaches -26.3℃, which is 30.9℃ higher than the average annual average.

This is a completely "forever" warming phenomenon. Therefore, the rapid and violent heat increase in Antarctica must be true.

In fact, from the temperature changes in Antarctica at the beginning of the year, we should also think that 2022 is an unusual year, and the climate complexity is an obvious fact.

So, in the summer and autumn of 2022, we see many countries around the world encounter extreme high temperatures, droughts and other phenomena, and there is no doubt. Judging from the trend of global warming, higher temperatures may occur in Antarctica in the future because global warming has not stopped.

can also be seen from the global average temperature released in 2022, and it continues to rise above 1 degree. In the next five years, the annual average temperature for at least one year will temporarily be 1.5 degrees Celsius higher than the average temperature from 1850 to 1900, and the possibility of this happening is 48%.

Therefore, the 1.5-degree climate critical point may be broken soon, and humans will face more serious natural disasters. This is not an alarmist statement. I believe many people should understand the global climate phenomenon in 2022. Of course, here we are talking about the crisis of sea level rise under the warming of Antarctic, let’s see how strong it is.

If the Antarctic glaciers completely melt, how much sea level rises?

In September, I believe many people have seen news about the melting of some glaciers in Antarctica, but this news is an explanation of the crisis caused by the melting of some glaciers in Antarctica. That is -, the Thwaites Glacier (also known as the "apocalyptic glacier" in the western Antarctica Amundsen Sea )

According to research, the glacier melts very quickly. Through satellite image observations between 2011 and 2019, the glacier retreated at a 2x pattern.

retreat speed from the stranded belt is close to 2.1 kilometers per year, which is a very dangerous signal. However, as the glacier continues to collapse, it will melt rapidly and may eventually lead to sea levels rising by about 10 feet (about 3 meters), which has to be said to be very impactful on the world. Although only about 3 meters of sea level rises.

However, due to rising factors such as global sea temperature, it is bound to exceed this "upward limit". However, what everyone sees is only the sea level crisis brought about by the Thwaites Glacier.

And for the entire Antarctic, the crisis of sea level rise will inevitably be stronger. This shows how this new research result released by Nature magazine.

The team of scientists from the University of Victoria, Wellington, ( New Zealand ) and Birmingham (UK), has come again through the Antarctic sea level rise crisis triggered by changes in atmospheric carbon dioxide . The team has established the first Antarctic ocean temperature chart to provide important insights into future sea level changes.

records for the first time the Antarctic sea temperature changes over the past 45 million years. However, data shows that in the future, sea level can rise as high as 50 meters after large-scale melting of Antarctic glaciers.

Of course, some research conclusions may be more than 50 meters. For the 50 meters mentioned here, we will use this data as the basis. Therefore, if Antarctic glaciers completely melt, sea levels may rise by 50 meters, which will inevitably have a great impact on the world. And for our country, the impact will be greater.

Sea level rises by 50 meters, which major cities in China will be submerged?

First of all, we can be sure that the changes in coastal sea level in China generally showed a fluctuating upward trend:

From 1980 to 2021, the rising rate of coastal sea level in China was 3.4 mm/year, higher than the global average in the same period. China's coastal sea levels have been at a high level in the past decade (2012-2021).

And in 2021, the coastal sea levels of Bohai , Yellow Sea, East China Sea and South China Sea are 118 mm, 88 mm, 80 mm and 50 mm higher respectively. Compared with 2020, the coastal sea levels of the Bohai Sea and the Yellow Sea rose by 32 mm and 28 mm respectively, the coastal sea levels of the East China Sea remained basically the same, and the coastal sea levels of the South China Sea fell by 18 mm.

So, overall, it is on the rise. Of course, in addition to the direct impact of sea level rise, there are also phenomena such as ground settlement that will lead to sea level rise.

And this time, if the sea level rises by 50 meters, the area that inevitably falls may also become an increase. When the sea level rises by 50 meters, which cities in China will be flooded? Let’s analyze it.

First talk about how our country will change if it rises by 3 meters. From the perspective of 3 meters, the overall change in our country is not very big. The south is mainly concentrated in the Pearl River Delta area, among which Shenzhen, Zhongshan , Pearl River , Guangzhou and other places have a great influence, with obvious flooding areas.

And the slightly serious thing in the north is the surrounding area of ​​the Bohai Sea, as well as Jiangsu Province, my country, and large areas have been flooded. There are also in the Yangtze River Delta , but not many.

And when it reached 30 meters, Guangdong, Guangxi, Hainan and other places in my country were all flooded. Among them, the Pearl River Delta region is basically an underwater city, and Leizhou Peninsula is also a large area that is flooded.

There are more northern regions, and Beijing, Tianjin and Hebei, Shandong and other places have been significantly submerged, while the entire province of Jiangsu has basically been flooded. At the same time, the Yangtze River Delta has also become an underwater city at this time. In addition, many cities in the Yangtze River basin have also been flooded, including Hubei, Jiangxi, Anhui and other places.

When it reaches 50 meters, there is not much room for changes in the south. Several major cities in the Yangtze River Basin have also been expanded and submerged. At the same time, there are not many areas in Beijing, Tianjin and Hebei and Shandong that have not been submerged.

So, overall, the most serious submerged area is probably the northern region, and the major developed cities are basically submerged. Overall, it is difficult for big cities such as Shanghai, Tianjin, Nanjing, Shenzhen, and Guangzhou to survive.