If Antarctic sea ice disappears completely, what impact will it have on the earth?

Will threaten more lives. With climate change, glaciers in the Himalayas are melting at an accelerated pace, threatening the safety of people downstream. The Himalayas is the result of the collision of two tectonic plates, which has shaped spectacular mountain landscapes and glaciers, with a population of 65.438+0.65 billion in glacial water. Melting glaciers have formed countless lakes, some of which may suddenly burst their banks, leading to flooding downstream. There are many lakes on the Qinghai-Tibet Plateau. A group of researchers conducted a satellite-based assessment of 129 1 glacial lakes in the Qinghai-Tibet Plateau and Himalayas, and found that 16% of glacial lakes may pose a threat to human security. Glacial lakes are naturally formed. The geological and hydrological conditions of glacial lake will ultimately determine its stability. If the glacial lake is unstable, it is easy to crack or dam break. Unstable glacial lakes pose a threat to residents living downstream or nearby. However, global climate change is making glacial lakes more and more difficult to control. "The global average temperature is rising, and we find that these lakes are getting bigger and bigger, and smaller and smaller ponds are starting to gather," said Jurana Horotiski, assistant professor of environmental science at the University of Colorado and national geographic explorer. "This problem is getting more and more serious." Glaciers melt to form glacial lakes. The waters around the glacial lake are surrounded by ancient glacial landscapes and rock obstacles, and ice dams may also form obstacles. Some factors may cause the water level to rise suddenly, and glacial lakes may cause floods, such as avalanches, rock collapses, earthquakes or the rupture of rock obstacles caused by long-term weathering. Glacial lake floods have occurred in places with glaciers all over the world. Since 1935, there have been about 40 glacial lake floods on the Qinghai-Tibet Plateau. In order to study the threat of glacial lakes to human beings in this area, researchers combine satellite technology with "open access street-level map database" in order to find the answer. The size of the lake, the size of the basin, the slope of the dam, and the size of the glaciers that form these lakes are all factors that determine whether the glacial lake will collapse. Researchers should consider these factors and the number of buildings that may be destroyed in the worst case. The Science Bulletin recently reported that there are 2 10 glacial lakes on the Qinghai-Tibet Plateau, which may pose a threat to people's living. Simon Allen, a glaciologist at the University of Zurich, is the lead author of the new study. He said that although the area is sparsely populated, he was surprised by the number of dangerous lakes. Lake Kyle in Chilon is the most dangerous glacial lake. There have been three recorded glacier floods in the lake, including the July glacier flood in 198 1, which killed 200 people. Allen told reporters that his team published a research report at the annual meeting of the European Union of Geosciences in Vienna, saying that a high-risk glacial lake group was found on the border between China and Nepal. His research warned that a glacial lake flood might cause losses to many countries at the same time. The researchers call for similar remote sensing prevention and control measures in a wider area, because there are more dangerous lakes there. Segui Guidice, an environmental geoscientist and research consultant of the World Energy Council, stressed that ground research will always play an important role in identifying glacial lake disasters. It will be more effective for local community residents to participate, because they have lived in a glacial environment for a long time and may capture environmental changes that remote sensing technology cannot find. Horotiski has done a lot of work in this field, and he agrees. The advantage of remote sensing is that it can identify the hazards of large-scale glaciers and lakes more quickly. Allen said: "This satellite-based approach is basically tailored for these areas prone to glacial lake disasters." This is not only to identify hazards, but also to help determine the location and priority of disaster reduction resources. This is important because the current disaster reduction plan is very limited. Source: Yellow Yellow Yellow Man, Water and China.