The picture shows the Arctic sea ice cover in the first week of January 2019, with an area of 116,000 square kilometers over four years.
Sina Technologies News, Beijing Time, September 11, according to foreign media reports, NASA recently released an animation showing that Arctic sea ice has decreased significantly in the past 35 years. If this trend continues, the impact on climate will be irreversible and the global environment will be severely affected.
Mark (Mark Serreze), director of the National Snow and Ice data Center, said:
Some areas of sea ice will form and disappear with seasonal changes, but there is always a certain proportion of sea ice in the Arctic Circle that can not be melted all the year round, that is, the so-called
The picture shows the Arctic sea ice cover in the first week of January 1988. The area of sea ice that has existed for more than four years is about 312,000 square kilometers.
Selez pointed out that nowadays, looking from the northernmost tip of Alaska, there is no sea ice within 700 kilometers. At this time of the past year, sea ice could be seen not far from shore. This fully demonstrates how great changes have taken place in Arctic sea ice. These changes will have serious environmental and cultural consequences and pose a major threat to the safety and life of Arctic residents. Local Indigenous Hunting is also affected because they cannot walk on the ice and polar bears and walruses are unable to move on the ice.
In addition, coastal erosion has become more and more serious in parts of the Arctic. Because some coastal areas are made up of sediments and have been dependent on permafrost.
All this shows that climate change is already a sure fact. It is not a problem to be solved by future generations in a few decades, but it is imminent and time is out of date. People who deny climate change often regard seasonal changes in phenomena such as melting ice sheets as seasonal changes
It can be seen that the seasonal variations of Arctic sea ice are consistent, but over the years, the white part becomes smaller and smaller, and eventually becomes a blurred streak in a light blue.
In addition to shrinking area, the quality of ice is declining. The thickness of the ice sheet is decreasing, and the old sea ice has almost completely disappeared. Just 40 years ago, the Arctic Ocean could still find ice that had remained undisturbed for more than a decade. And from now on, this will never happen again.
As the terrain changes,
How long the Arctic ice will last depends on what action we are taking right now. We can slow or even stop ice melting completely, but according to current greenhouse gas emissions, Arctic ice will disappear completely in about 2050. Some predictions are even earlier than this, believing that by 2030 or so, there will be no ice cap in the Arctic in some seasons.
The Snow and Ice data Center in the United States has been studying the Arctic and other cold regions for decades in the hope of better predicting the future of mankind. In the video released by NASA, the sharp decline in the Arctic ice sheet may shock many people, but scientists have reacted quite well to it.