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Escalating global temperatures are precipitating profound and multifaceted challenges for winter athletes across the globe. The contraction of natural winter seasons and the increasing volatility of snowfall patterns are compelling skiers and snowboarders to compete with greater frequency on artificial surfaces. Simultaneously, the natural ice that forms on ponds and lakes is becoming progressively unstable, posing significant safety risks for recreational users. Elite athletes are responding to these volatile environmental conditions by refining their equipment and adapting their technical skills to ensure survival and maintain peak performance. Their experiences provide critical insights and essential lessons for anyone who participates in winter activities within a rapidly changing climate.
Sarah Cookler vividly recalls a specific race that occurred in March 2023, an event that underscored the severity of these environmental shifts. She was coaching Team USA in ski mountaineering, a grueling sport involving races up and down mountain slopes while wearing skis. The competition took place in the Pyrenees mountains of France, where the conditions were far from typical for a winter event. "It was probably around 40 to 50 degrees Fahrenheit," Cookler stated, noting the unseasonable warmth. The entire course was blanketed exclusively in artificial snow, which felt wet, slick, and devoid of the powder characteristic of natural winter. Dry, yellow grass lined the periphery of the track, starkly contrasting with the white surface. Her athletes, who typically train in Utah where they encounter deep, dry snow, had never before faced such warm and treacherous conditions.
This scenario is evolving from an anomaly into a standard reality. As the duration of natural snow seasons continues to shrink, athletes are training and competing almost exclusively on machine-made snow. For ice sports such as skating and hockey, warmer winters result in ice forming later in the season and melting significantly earlier. This shift creates a far more hazardous environment for all participants. Consequently, many athletes now depend on indoor arenas to practice and compete in a safe, controlled environment. The strategies competitors develop to adapt to these new conditions offer a blueprint for everyone to remain safe while enjoying winter sports.
The 2022 Winter Olympics in Beijing relied entirely on artificial snow. To the untrained eye, it might have appeared identical to natural snow, yet the athletes perceived a distinct difference immediately. Artificial snow possesses unique physical properties due to its specific manufacturing process. Snow hydrologist Noah Molotch elucidates these visual distinctions. "It's got kind of a beige color," he explains. "It's not yellow snow! But it does have a slightly darker appearance."
Machines generate artificial snow when air temperatures drop sufficiently low. They spray a fine mist of water into the freezing atmosphere. The tiny droplets freeze into hard, spherical beads before they even make contact with the ground. In contrast, natural snowflakes form high within clouds and exhibit intricate shapes, such as stars and plates. These complex structures trap a significant volume of air, rendering natural snow fluffy and light. Artificial snow beads are considerably denser and contain substantially less air. "Those beads don't have as much air as a natural snowflake," Molotch observes.
This physical divergence fundamentally alters how the snow behaves on the ground. Powder snow, a favorite among skiers, is soft and loose. Artificial snow, however, is harder and more tightly packed, creating a firm and smooth surface that allows skis to race across with increased speed. "Artificial snow is less likely to get rutted by skis," Molotch notes. However, this hardness means that falls are significantly more painful. "There is no give in that snow," Cookler adds, highlighting the reduced shock absorption.
Prior to a race, athletes meticulously inspect the course and adjust their gear to align with the specific conditions. For the Pyrenees race, Cookler's team engaged in rigorous preparation. They filed their skis to sharpen the edges for enhanced control and applied a specialized wax designed for the weather. Cookler points out that artificial snow "rips the wax off a lot faster and is abrasive on the skis." Because the day was unusually warm, her team selected a hydrophobic wax. This specific type of wax repels water, preventing a "suction cup" effect that can occur in wet snow conditions. They also attached climbing skins to their skis to ensure better grip on the uphill sections of the track.
Technique must evolve alongside the equipment. "Going downhill when snow is soft and slushy is going to be different than when it's firm and icy," Cookler observes. On soft, artificial snow, she advises skiers to be "a little softer with your turn so you don't dig in as much." Because winters are warming, artificial snow is now a ubiquitous component of competitions. A study published in December 2024 revealed that winters in the Northern Hemisphere warmed noticeably between 2014 and 2023. Countries lost an average of seven winter days during this period. In Europe, which hosts many ski resorts, the loss exceeded two weeks per year. Resorts now frequently utilize snow machines to construct a reliable base of snow.
Molotch advises recreational skiers to inquire precisely where a resort utilizes artificial snow. A sudden transition from natural to artificial snow can easily precipitate a crash. He has sustained injuries from years of skiing on hard, compacted snow. When asked how he adjusts his technique now, Molotch states: "I ski away from it."
For ice athletes, most high-level competition occurs indoors. However, ice quality in arenas can vary significantly between different locations. Kelsey Koelzer is a college ice hockey coach. "When you first step out there, you can tell if the ice is going to be hard or soft," she says. Hard, cold ice is faster and requires less physical exertion for hockey players. Soft, warmer ice is preferable for figure skaters, as it grips their blades more securely. Arena technicians meticulously control ice temperature and thickness to suit each specific sport. However, a survey conducted in 2024 found no scientific consensus on the perfect ice temperature. This lack of standardization means that quality differs from arena to arena, requiring teams to account for these variables when traveling for events.
The more significant transformation is occurring outdoors. Warming winters are making natural ice on lakes and ponds less stable and safe. Hydrologist Joshua Culpepper led a major study on lake ice. His team utilized computer models to analyze data stretching back to 1850. They project that by the end of the century, there could be 5 to 29 fewer days each year when lake ice is safe for skating or walking. The exact number depends on the extent of future winter warming.
Perhaps more troubling is the revelation that ice thickness alone may no longer be a reliable safety guide for recreational users. Some states stipulate that 10 centimeters (4 inches) of new "black ice" is safe. Black ice is clear and solid. But Culpepper's research found that "white ice"—formed when snow melts and refreezes on top—is much weaker. "When you have more white ice... it's about 50 percent weaker than black ice at the same temperature," he explains. Climate change is leading to more white-ice conditions globally. "If you're out on a lake that had a small layer of black ice and then it snowed a lot," Culpepper says, "you need twice the recommended ice thickness" for safety.
It remains possible to enjoy outdoor skating safely, but it now requires a higher degree of caution and knowledge than ever before. Retired champion figure skater Angelina Huang loves skating on frozen lakes for the freedom it offers. "A lot of the lakes that I tend to skate on stretch 10 to 15 miles long," she says. She stresses safety above all else. Huang trains annually in ice knowledge and self-rescue techniques. She advises less experienced skaters to use managed ponds where experts check the ice regularly. She also emphasizes never skating alone.
Culpepper and his colleague Sapna Sharma offer similar advice. Children should always skate with an adult. An adult should test the ice thickness first. "Have an adult test the ice before going out," Culpepper advises. Sharma adds, "if you're going to go out on [lake] ice, learn how to swim in cold water."
Coach Kelsey Koelzer sums up the situation perfectly. Enjoy skating in nature, she says, but "always have your guard up." In a warming world, understanding the changing qualities of snow and ice is the key to enjoying winter sports safely. The shift is not merely about fewer days on the calendar; it is a fundamental alteration of the physical medium in which these sports exist. As the climate continues to warm, the margin for error shrinks, demanding a new level of vigilance from athletes and enthusiasts alike. The lessons learned by elite competitors in adapting to artificial snow and unstable ice are essential for preserving the tradition and safety of winter sports for future generations.