The winter of 2025 has become a landmark for the Arctic. According to the US National Snow and Ice Center and NASA, the winter maximum of sea ice was the lowest in the history of satellite observations, at about 5.53 million square miles. For a region that has been considered a stable ice sheet of the planet for decades, this is no longer a fluctuation, but a steady trend.
The Arctic is warming up. Photos from the Internet
Scientists note that the long-term ice has almost disappeared, and the seasonal ice has become thin and fragile. Such a cover retains the cold worse and does not protect the ocean well from heating.
Arctic ice used to work like a giant mirror. The light surfaces reflected a significant portion of the solar radiation back into space. Now, more and more often, dark water remains in place of ice, which absorbs heat and heats up quickly.
Experts explain that this triggers a feedback loop. Warmer water destroys the ice edge, polynyas form, and even more of the ocean surface opens up. Additional energy enters the system, and warming is already intensifying not only in the north, but also in the middle latitudes.
Research in 2025 showed that many climate models underestimated the rate of sea ice melting. The calculations lacked details of small processes that occur at the water-air boundary, the influence of local currents, and the structure of the ice field itself.
Climatologists say that the Arctic may lose its ice cover not smoothly, but in spurts. In some years, summer without sea ice on an ocean scale no longer looks like a distant scenario.
The reduction of Arctic ice affects not only polar species such as polar bears, walruses, and seals, but also the traditional way of life of the northern peoples. Fish migration routes are changing, access to food resources is changing, and ecosystem boundaries are shifting.
Of particular concern are possible changes in the system of ocean currents that carry heat from the tropics to the north. Disruption of these flows can change the weather in Europe, Asia and North America, increase extreme events and make the climate less predictable.
PSN
