What are the causes of glacier melting? Consequences of melting glaciers

Climate warming is the main cause. According to a study by the United Nations Environment Programme, experts have made observations of the Ni glaciers using aerial surveys, satellite observations and field visits, and the results show that temperatures are increasing in these areas of the Himalayas.

The fact that regional glaciers are melting at an accelerated rate is yet another indication of global warming.

is the greatest threat humanity will face in the coming decades. Population expansion, overgrazing, over-cultivation, deforestation, indiscriminate digging of Chinese medicinal herbs, and indiscriminate extraction of groundwater are another cause. The contradiction between man and land led to the 20 years after the founding of the People's Republic of China.

By the end of the 90s of the last century, the area of soil erosion in Gansu Province accounted for the total area, the number of sandstorms increased significantly, and the deterioration of the climate in turn exacerbated the shrinkage of glaciers.

Because of the indiscriminate felling of trees by human beings, carbon dioxide cannot be purified by trees to become oxygen again, resulting in carbon dioxide exceeding the earth's net load, too much greenhouse gas will lead to the greenhouse effect, the greenhouse effect will lead to global warming, global warming will lead to the melting of glaciers, too much melting of glaciers, the earth's land will be flooded by seawater, and eventually seriously lead to the extinction of human beings.

If you've ever paid attention to the "breaking" scene of the glacier in the documentary, you may have wondered the question - what is really going on inside the glacier? This 1-minute ** is a visual demonstration and theorizes that the ice near below will melt first, and the top will break with it.

The consequences of melting glaciers are, first, rising sea levels, some cities in low-altitude areas may be covered by seawater, second, changing the landform, inducing floods, landslides and other phenomena, third, freshwater scarcity, the loss of fresh water from glaciers into the ocean, and fourth, the extinction of animals, and the loss of habitat for animals to the brink of extinction.

There is a lot of natural gas under the glacier, some is a toxic gas, some is a greenhouse gas, and if the glacier melts, a large amount of gas is released into the atmosphere, which has the potential to accelerate global warming.

Since ancient times, viruses, bacteria, and other substances have become extremely inactive in the cold conditions of glaciers, and if glaciers melt, viruses from the past may be released and slowly circulated through air convection to the places where humans live, causing disease disasters.

It takes a process for glaciers to melt to affect human life, but it will directly affect the lives of local animals, who will lose their homes, food, etc., and eventually die.

It should be said that basically not.

Although the earth has a warming trend, and the glaciers in the polar regions and some plateaus are also melting, it is impossible for all glaciers to melt, as long as the earth itself and the space where it is located will not change greatly, the glaciers in the polar regions will not completely melt.

Because the temperature there is so low, the temperature is minus tens of degrees Celsius all year round, unless there is a serious greenhouse effect like Venus, the average temperature on the surface of Venus is about 460, and the poles and the equatorial region are almost the same, the temperature of the entire planet is above freezing, and the glaciers at the poles of the earth will completely melt.

Although there are signs of the greenhouse effect on the earth today, and there are often news reports of glacier peeling and disappearing, in fact, the glaciers at the poles will also thicken and increase every winter, so although the area of glaciers on the earth has changed, it is not particularly much, and it is impossible to completely melt away, so the scene of seawater flooding land in the previous pictures is basically invisible.

Global climate change is one of the main causes of glacier melting. About 1 3 of the world's population lives within 60 km of the coastline, with a developed economy and dense cities. The expansion of ocean water bodies and the melting of snow and ice at the poles due to global warming could raise sea levels by 50 centimeters by 2100, endangering coastal areas around the world.

Especially those densely populated and economically developed estuaries and coastal lowlands. These areas may suffer from inundation or infestation, erosion of beaches and coasts, deterioration of land, increased inundation and flooding, damage to ports, and disruption of coastal aquaculture and water supply and drainage systems.

The global climate system is very complex, and there are many factors affecting climate change, involving solar radiation, atmospheric composition, ocean, land and human activities, etc., and there are still uncertainties in the scientific understanding of climate change trends.

In particular, it is not possible to make a more accurate judgment on the changing trend of climate in different regions and their specific impacts and hazards. But from the perspective of risk assessment, most scientists assert that climate change is a huge environmental risk facing humanity.

1. Climate warming.

Climate warming is the main cause of glacier melting. According to the United Nations Environment Programme (UNEP), glaciers in Bhutan and Nepal have seen an increase in temperature compared to the 70s of the 20th century1. At the same time, scientists in New Zealand have analyzed the glaciers in the territory and found that due to the prevalence of high pressure and dry weather, the snowfall has decreased significantly, and the glaciers will rely on natural snowfall to maintain dynamic equilibrium.

When high temperatures or adverse weather continue to occur, the glaciers will continue to melt.

2. Human causes.

In addition to the causes of climate warming, the world's population expansion, excessive deforestation, indiscriminate exploitation of underground resources, overgrazing and other unenvironmentally friendly behaviors have led to a large amount of greenhouse gas emissions, which will also accelerate the melting of glaciers. In particular, the long-term deforestation and reclamation of land in the northwest region has led to serious soil erosion and an increase in sand explosions, which has exacerbated the melting of glaciers.

Therefore, we should pay attention to consciously cultivate low-carbon and environmentally friendly living habits to reduce greenhouse gas emissions caused by human causes.