"Video" North Pole can wear short sleeves?Zhongdaji expert: The fierce ice melting of the high latitude ice cover is shocking

Text, video editing/Yangcheng Evening News all -media reporter Chen Liangtu, video material/interviewee provided

Can the North Pole can already walk around a short -sleeved T -shirt? Recently, the temperature of the Arctic circle soared to 32.5 ° C. Scientists in the Arctic region even wore short -sleeved shorts and played volleyball on the ice. The ice cover covering the world's largest island Greenland is also accelerating.

Why is the Arctic "high fever"? What impact will this have on the world? What measures will we take to protect and study polar? To this end, a reporter from the Yangcheng Evening News interviewed Zheng Lei, a member of the Poor Team of Sun Yat -sen University and an associate professor at the School of Surveying and Mapping Science and Technology of Sun Yat -sen University.

The ice water system formed by the gathered Rongshui of Sigeria (August 29, 2019, UAV Airlines, provided by Sun Yat -sen University Polar Team)

The Arctic Sea Ice has decreased rapidly, and the Arctic temperature rises further

"In the summer of 2015 and 2019, when our team went to Swarba and Greenland scientific investigations in the Arctic Circle, the local temperature was about 0 ° C. It was still difficult to wear short sleeves. The influence of global warming, we also witnessed the large -scale melting scene of the ice sheet during the scientific research process of the Antarctica. "Zheng Lei told reporters that the phenomenon of" high temperature "in the Arctic has also observed that the team has recently been based on satellite remote sensing based on satellite remote sensing sensing. The research results of data show that under the context of global warming, the melting of sea ice, ice sheet and seasonal snow is intensified.

"The rapid decrease in the Arctic Sea Ice has led to the increase in energy absorption in summer and further increase in the North Pole temperature, which shows that polar warming is a positive feedback process." Zheng Lei said that the team's satellite remote sensing monitoring results also found that Green Bingbing Average of 700 billion tons of melting water is generated each year, and half of them will flow into the ocean. There are still a large part of the melting water that do not freeze, but stored inside the ice sheet to destroy the stability of the ice sheet and become a buffer that affects the changes in the sea level.

There are usually two aspects of human activity and natural reasons that affect climate change. So what are the factors of the Arctic climate change? Zheng Lei pointed out that in terms of human activities, the carbon dioxide emitted by fossil fuel burning since the industrial revolution and other greenhouse gases have caused a wide and rapid change in the climate system. Natural reasons refer to the oscillation of the climate system at different time standards, including the periodic changes of the spatial environment of the earth and the changes in their own activities.

In the past century, the global climate has undergone significant changes in warming at one time. The climate assessment report of the Special Committee of the United Nations Intergovernmental Climate Change (IPCC) pointed out that human activities are likely to be the main cause of climate change. This includes an increasingly frequent extreme high -temperature weather incident.

The ice surface water system formed by the melancholy water of Rongshui (August 29, 2019, the ice surface water system generated by the UAV aircraft image, provided by the polar team of Sun Yat -sen University)

The disappearance of the Greenland ice cover will cause the global sea level to rise by 7.4 meters

What impacts the emergence of extreme high -temperature weather will have on North and South Polar Glacier and even the world? Zheng Lei pointed out that in the recent region (including my country) in the northern hemisphere, it has encountered extreme high -temperature weather. High temperature weather will cause land drought, forest fire, affecting human health, etc., and will also accelerate the melting of polar ice and ice sheets to form compound extremist incidents Essence

A direct impact of the accelerated melting of polar glaciers (including Antarctic and Greening Bingjie) is the rising global sea level, which greatly threatens human society, especially the social and economic development of coastal areas.

"A large amount of glacier melts into the ocean will change the marine ecological environment and foreign flow systems, which will affect the global climate. The accelerated melting of polar sea ice and ice sheet will destroy the original living environment of polar biology, resulting in the difficulty of foraging of polar bears and penguins. Large, forming a crisis of survival. "Zheng Lei said that at present, Greenland ice lid is accelerating melting. If the entire ice cover disappears, the global sea level will rise by 7.4 meters. From the perspective of the existing melting speed, the Greening ice cover has been completely disappeared for a long time, but once the temperature increases to a critical point, the ice cover may enter the irreversible continuous material loss state and eventually disappear.

The ice -faced lake formed by the southwest Nansen Ice Shelf (74 ° 56 ′S, 163 ° 42′E) gathered in the melting water (Zheng Lei shot on January 24, 2022)

Polar three -dimensional observation and detection technology and equipment need to focus on development

Today, many countries around the world are working hard to reduce carbon emissions and promote carbon neutralization and other activities that are conducive to environmental activities. However, natural changes such as glaciers melting are still unavoidable.

Zheng Lei explained that the carbon cycle is a process. Climate change is the result of the multi -layer of the earth system. It may take a period of time to see the effect of energy saving and emission reduction. "This also shows that if we do not perform strict emission reduction measures as soon as possible, continuous carbon emissions may trigger the interrelated climate 'critical point' and alleviate the time required for global climate warming."

In September 2020, my country clearly proposed that the "carbon peak" (that is, the peak of carbon dioxide discharge of carbon dioxide) in 2030 and 2060 "carbon neutral" (that is, the carbon dioxide that produced and absorbed). "Double Carbon" is a solemn commitment to the world, and it is also an inevitable requirement for high -quality development. It is the only way for modernization to.

Zheng Lei believes that on the one hand, we need to accelerate the formation of energy consumption structure mainly based on clean energy, on the other hand, we must improve energy efficiency and pay attention to the development and use of energy saving technology. In addition, we should start from ourselves to advocate green, low -carbon, and environmentally friendly lifestyle in daily life. According to reports, the polar team of Sun Yat-sen University has been actively constructing a polar air-heaven-earth-sea-ice observation system, and based on the construction of a high-level climate change and innovation research highland for the construction of the international leading level. In the past 20 years, the team has participated in a total of 20 people in the North and South Pole in my country, and carried out a polar ice, ocean and ecological environment-sky-heaven-earth observation, and the research in the sea ice change mechanism, the estimation of the balancing of ice caps, the penguin habitat and the monitoring of population group monitoring, etc. A series of outstanding research results have been achieved.

Earlier this year, Zheng Lei participated in the 38th Antarctic Inspection of China and appeared on the ice shelf on January 15. Due to the high latitude of the Antarctic ice cover, the past research generally did not pay much attention to the melting surface of the Antarctic ice sheet. When he saw such a severe ice melting near 75 ° S, he was shocked.

In view of this, the team has formulated nearly 70 shelter surface water system drone aircraft plans to obtain nearly 30,000 aerial photography images, which provides a lot of valuable information for the team to further study the polar climate change and ice shelf stability.

Source | Yangcheng Evening News · Yangcheng School

Editor -in -law | Chen Wanyun

School Delivery | Zhao Dandan

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