Why do scientists say that the high temperature of 30 degrees in the Arctic is a warning to enter the ice age?

This phenomenon is very serious. It shows that the world is warming, but this is not a good thing for the whole earth ecology.

First of all, the performance of global warming

When the global average temperature rises 1℃, great changes will take place: sea level rises, glaciers in mountainous areas shrink, and the snow area shrinks. As the global temperature rises, it will lead to unbalanced precipitation, with precipitation increasing in some areas and decreasing in some areas.

When the global average temperature rises by 3℃, human beings will be unable to recover and the world will be short of food. Due to the rising temperature, the global sea level has been rising at an annual rate of 1 ~ 2mm in the past 100 years. It is predicted that by 2050, the sea level will continue to rise by 30~50 cm, which will flood a large number of low-lying areas along the coast, and many countries and cities will be in danger.

The harm of global warming and melting glaciers. The most obvious is the retreat of Himalayan glaciers. In South Asia, the question is not whether glaciers are melting, but how fast they are melting. Although many adverse effects of global warming may not become very serious before the end of 2 1 century, glacial meltwater in Nepal, India, Pakistan, China and Bhutan may soon bring people trouble.

A research report of International Ice and Snow Committee (ICSI) points out:? Glaciers in the Himalayas are retreating faster than anywhere else in the world. If the current melting rate continues, these glaciers are likely to disappear before 2035? .

Saeed, head of the International Snow and Ice Committee? Hasnan said? Even if the glacial meltwater dries up within 60 to 100 years, the scope of this ecological disaster will be shocking. ? The most serious melting of glaciers is in the eastern Himalayas in the Ganges River basin. They are distributed in? Roof of the world? Glaciers from Bhutan to Kashmir are the fastest receding in the world. Take the 3-mile-long barna Glacier as an example. This glacier is 40 million? One of many glaciers formed by the collision between Indian subcontinent and Asian continent 50 million years ago has retreated half a mile since 1990.

After the severe sub-arctic winter in 1997, scientists had predicted that this glacier would expand, but it retreated further in the summer of 1998.

Second, the harm of global warming.

Global warming leads to sea level rise and precipitation redistribution, which changes the current world climate pattern. Secondly, global warming affects and destroys the biological chain and food chain, bringing more serious natural consequences. For example, there is a migratory bird that flies from Australia to northeast China for the summer every year. However, due to global warming, the temperature in Northeast China is rising and the summer is prolonged, so the time for this bird to leave and return to Northeast China is delayed accordingly. As a result, a pest eaten by this migratory bird flooded and destroyed a large area of forest.

In addition, extreme events related to the environment have increased, such as droughts and floods. Harmful Climate of Global Warming Global warming has increased precipitation in Chinese mainland, especially in middle and high latitudes, and reduced precipitation in some areas such as Africa. Frequency and intensity of extreme weather and climate events (El Nino, drought, flood, thunderstorm, hail, storm, high temperature weather and sandstorm, etc.). ) has increased in some areas.

In a word: Last week, the Arctic experienced the highest temperature in history, which was 30 degrees higher than in previous years, which not only shocked scientists, but also attracted human attention.