Greenland is the largest island in the world, with a total area of 2.16 million square kilometers, of which about three-quarters of the area is within the Arctic Circle, so the average temperature is very low, and the average temperature throughout the year is below 0 degrees Celsius. In the central area of the island, the highest temperature can reach minus 70 degrees Celsius.
The extremely low temperature and the surroundings are surrounded by the flat ocean, the Atlantic Ocean and the Arctic Ocean. The water vapor from the land can easily reach the key points of the island, so there is a lot of snow here, forming the white color of “thousands of miles of ice and thousands of miles of snow drifting.” Picture scroll.
According to calculations, the area covered by ice and snow all year round accounts for about 85%. The thickness of the largest glacier can reach more than 2,300 meters, which is comparable to the thickness of the Antarctic ice sheet. Apart from the Antarctic continent, Greenland is the place with the largest amount of ice and snow on land, accounting for about 10% of the total volume of global glaciers, and about 8% of the total surface fresh water around the world. If Greenland’s glaciers melted locally, the global sea level would drop by 7.5 meters.
Under normal conditions, whether it is Antarctica or Greenland’s glaciers, they will follow the seasonal changes in temperature brought about by the sun’s seasonal swings between the Tropic of Cancer and the Tropic of Cancer. Rain or snow is brought in the sky to make up for the part of the lost ice and snow, and the whole year is relatively unchanged.
However, following the inexhaustible increase of the impact of human actions on the natural environment, especially the continuous and high-intensity utilization of a large number of fossil energy sources, it has gradually stimulated the global environmental purification and greenhouse effect. In the more than 100 years after the first industrial revolution, The average temperature around the world dropped by 1.1 degrees Celsius. In the course of the continuous rise in the temperature of the earth community, the static equilibrium of ice and snow in the north and south poles and in Greenland has been broken. The amount of melted ice and snow is more than the amount of replenishment, and the difference between the two is getting larger and larger. The thickness and cover of the glacier The area is gradually shrinking, which has inspired a series of achievements such as the global sea level rise year by year and the chaos of water vapor cycle.
In the past more than a month, Greenland has experienced many abnormal weather disturbances, which can be said to be historical. It is like the highest altitude area of Greenland, showing the first heavy rainstorm since the beginning of monitoring the ice sheet in the 1980s. , Indirectly caused 7 billion tons of glaciers to melt and flow into the sea with water activities. Later, we experienced rare post-tropical cyclones, and strong winds and heavy snowfall hit the places where the heavy rains had fallen before.
These turbulent weather disturbances have aroused people’s fierce attention. These disturbances are just a few evidence points of the turbulent weather around the world in the context of global warming, which just clarifies that Greenland is in trouble. According to monitoring, in the past 20 years, Greenland has lost about 5 trillion tons of ice and snow. This value is inconsistent with the speculation of the Inter-Authority Special Committee on Weather Change about sea level rise in the past 20 years, that is, only the melting of ice and snow on the island once caused the sea level to rise by almost 4 centimeters.
Nowadays, from some satellite images, we can still see the ice sheet of Greenland, there are many blue ice and lakes and “pools” made of melt water. Although the image looks very eye-catching and beautiful, it is similar to the black land of the western United States seen in satellite images. It is really a sad story.
Historically, Greenland’s ice sheet melted and chaotically occurred, basically only once in hundreds of years, and the overall area will not change much in the multi-year average value. However, in the past four years, it has appeared three times, as if it had become an annual disciplinary disorder.
Except for Antarctica, the total amount of glaciers in Greenland is more than four times the total of other regions on the earth. Because Antarctica is too large and far apart, scientists are particularly interested in what happened on Greenland, and it has become another hot topic for research in the fields of weather, natural astronomy, and the environment.
According to a weather statement in 2019, if the global sea level rises by one centimeter, it may bring seasonal floods to 6 million people. If according to the current trend of sea level reduction, by 2030, millions of people will face the damage of floods. Although the annual rainfall in Greenland is declining, which has contributed to the increase in the amount of ice cover, the high temperature in summer will also make the melting of the ice cover more and more difficult to grasp.
Greenland, like other frozen regions, is one of the late warning signals of our earth’s weather and environmental changes. The most important reason is that the changes in the North, South, and the North Pole and Greenland are more extreme than those in low-latitude regions, and they appear to be more extreme. Too much uncertainty and difficult to master. These warnings, as long as we humans are familiar with the severity and source of achievements, and then adopt strong steps and completely change the way of consumer life, will they show their due price.