What will happen if the temperature reaches 48℃?

If you stay at 40℃ for a long time, with the massive loss of water in the body, if you don't replenish water in time, it will lead to the decrease of osmotic pressure of body fluids (salt will be taken away in sweat), and people will feel tired, dizzy, nausea, vomiting, and even "heat spasm" symptoms such as muscle pain in limbs and abdominal wall, and even life-threatening.

Therefore, people in the Arctic Circle have basically stopped studying how to adapt to the continuous high temperature. It's just a minor illness. Terrible is that once the frozen soil is unsealed, the prehistoric virus hidden in it will come to the world.

Previously, scientists discovered another virus under the frozen soil of Siberia. After calculation and research, this virus has existed on the earth for more than 30 thousand years, and it is a prehistoric virus. The viruses under these frozen soils should not be underestimated. They all have extremely complicated gene structures, and some even have more than 1500 genomes, while ordinary viruses only have less than 10. HIV is nothing in front of them.

The dangers under these glaciers are completely different from the viruses we know at present, so if people are infected with these viruses, it is not so easy to study drug resistance. If global warming continues, various virus plagues are likely to break out in human society in the future, which will appear in different new virus forms around the world, so this will be a big test for human medicine in the future.

Not only the human body, but also the thawing of frozen soil will have an impact on some human infrastructure: the "unstable trend" of frozen soil in Alaska has caused damage to local infrastructure such as roads, pipelines and tracks.

Effects on animals:

Arctic popular animal, polar bear, well, that's it. It's gonna be terrible. Being at the top of the food chain is basically starvation. Why? Polar bears can only hunt on the ice, and the speed of fighting aquatic animals underwater is only to stop eating. Polar bears basically ambush and hunt, and they have excellent sense of smell. They like to eat seals. Seals move in the water under the ice. Because seals are mammals, they can't breathe in water, so they need to go back to the ice to breathe. Seals have a fixed breathing opening (a hole in the ice). The polar bear finds the breathing port, waits for the rabbit, and catches the seal when it breathes.

But when the temperature reaches 40℃, the sea ice will melt and the land on the ice will disappear soon, which is calculated by professional geographic mapping. Polar bears will lose their hunting grounds, and this species needs to lie on a large area of floating ice to relieve its physical strength. If you keep swimming without being hungry, it will be exhausted and eventually kill each other until it becomes extinct.

However, polar bears are just one of many victims. Many people know that although the Arctic Ocean is a vast frozen continent, the water it melts is really fresh water! With the continuous high temperature, the melting speed is amazing, and the cell concentration in most marine fish is relatively high. Once a large amount of fresh water invades, cells will swell and die, which will bring a disastrous blow to the biological chain.

Effects on plants:

When a large number of ice cubes melt, there will be more blue parts (seawater) than white parts (ice cubes) at the poles. It is a well-known principle that dark colors absorb more heat.

If green plants grow in permafrost, they will absorb more heat than snow and ice in the past. In addition, phytoplankton will inevitably grow on the warmed sea surface, which will accelerate global warming.

Global warming will make the world's major grain belts expand to the polar regions. The expansion speed is 1℃ for every increase in the annual average temperature, the crops in the mid-latitude regions of the earth will be pushed to the polar regions by about150km, which will prolong the growth period of crops in the colder high-latitude regions and increase the output accordingly.

However, rising temperature will also increase extreme weather in mid-latitude areas, increase surface evaporation, lower groundwater level and aggravate drought. Rising temperature will aggravate high temperature and summer drought in low latitudes. All these will lead to a decline in grain production in the middle and low latitudes. The main grain producing areas in the world are all distributed in the middle and low latitudes, and the cultivated land area in the high latitudes is limited, so the increased grain output in the high latitudes is far from making up for the reduced grain output in other regions.

Climate warming will also lead to sea level rise, seawater intrusion inland, and saline soil expansion inland, which will make the salinization and swamping of crop growing areas more serious. However, saline soil can't grow crops in the traditional sense, so the planting area near the coast will drop sharply and the grain output will drop.