We have been observing the snow of the northern hemisphere from space for 40 years. The conclusions of the latest major study are devastating
As some older people around us say: winter is already it’s not what it was. As we move forward in the decade, scientific data paints an increasingly clear and disturbing picture of the amount of snow that has accumulated in some parts of our planet. And the images seem to leave no room for doubt, since they suggest that snow coverage in the northern hemisphere is constantly reducing, altering the seasonal cycles that govern our climate. The data. The last job we have had access to was published in January of this same year, and the conclusion they have drawn is quite devastating when pointing out that 24% of the regions of the northern hemisphere show a significant decline in the presence of snow, compared to a mere 9% that has registered an increase in its amount. How it looked. To reach these conclusions, researchers have not limited themselves to looking at the thermometer. They have turned to a gigantic high-resolution database that brings together historical data since 1980 with information on both snow and ice. Mathematical model. But the real advance in this case lies in the use of advanced statistics. And, expanding on previous research from 2023, they have applied a two-state Markov chain model, which in simple terms is a mathematical model that allows analyzing the spatial and temporal probabilities of snow persisting or disappearing in specific grids on Earth over decades. That is why we are facing one of the most rigorous methodologies that currently exist to understand snow trends, eliminating the “noise” of the precipitation that is coming in the coming months. Early spring. But… Where exactly is the snow disappearing? The Markov model reveals that the decline is not uniform, but there is an alarming pattern that directly affects our side of the globe: spring melt is coming forward dramatically in Europe and Central Asia. Right now we are seeing snow melting earlier, shortening winter temperatures and directly altering the water cycle, which is vital for agriculture and ecosystems during the warmer months. The consequences. But it is not something new, since previous works already warned of this loss of snow, which is a decline that not only affects water reserves, but also the ability of the Earth’s surface to reflect solar radiation. Something that is not nonsense, since less snow means more exposed dark land, greater heat absorption and, consequently, an increase in regional temperatures. A consensus. In addition to this study, in 2025, research was also published that analyzed possible biases in climate records. NOAA historicalconfirming that the decline in snow during autumn and winter is a real phenomenon and not an erroneous measurement. But it does not stop there, since the last Arctic bulletin painted a very extreme scenario, since, although there was above-average snowfall until May 2025, the decline during June was so rapid and abrupt that snow coverage was reduced to half of what it was 60 years ago. A mixed and volatile pattern that shows a climate system under stress. Images | Mathieu Odin In Xataka | Under the Canary Islands rests a 1,625 meter volcano: it has now begun to show signs of life after ten years of vigil