Climbers have been visiting the Rifugio Casati, a four-story building 10,725 feet above sea level in the Italian Alps for nearly a century. In 2016, Renato Alberti, who has overseen the structure for 35 years, noticed a longitudinal crack in one of his exterior walls. Alberti, now 67, filled the gap with repair foam, but the crack re-opened in just a few days. Alberti thought something unusual must be happening. The mountains may have become unstable.
His ideas were met with skepticism by others familiar with the site. “At the time, we had simpler ideas about climate change,” says Riccardo Giacomelli, an architect who specializes in high-altitude buildings. He specialized in high-altitude buildings and climbed the Rifugio Casati with a geologist to study the cracks after Alberti found them. Giacomelli is also Chairman of the Central Committee of the Alpine Club of Refuge and Alpine Works in Italy. The association owns the Rifugio Casati and 721 other ‘huts’ and bivouacs (small, uninhabited buildings that are important transit points for those climbing many peaks) in Italy. “We knew there would be warmer temperatures and less snow,” says Giacomelli. “But it seemed crazy to think that it could cause problems for the building.”
Over the course of the next few summers, Rifugio Casati’s walls cracked, the tiles inside began to crack, the doors wouldn’t close properly, and the corners of the terrace sank over a foot. Geological studies confirmed Alberti’s hypothesis. Rifugio Casati sits on permafrost-rich soil, and temperatures are rising due to global warming. The changing morphology of the soil strained the foundations of the building, and the southern part of the building appeared to be sinking. There were more falling rocks on the mountainside, and we were getting closer and closer to the building. Authorities say the structure will have to be dismantled and rebuilt in a more stable position over the next few years, possibly beginning in 2024. The hut will reopen this summer.
Rifugio Casati’s predicament is one symptom of the many problems that preceded the Alpine highland infrastructure. Over the past few years, thawing permafrost has threatened dozens of huts, access trails and cable car poles, costing millions of dollars in damage and preventative measures, and some experts fear that the I began to question the sustainability of outposts and operations.
Most of the Earth’s permafrost (permafrost containing ice and rock) is in the Arctic region, and the impact of its thawing on infrastructure such as roads is well documented. But high mountains such as the Alps, the Himalayas and the Andes also have permafrost, and as long as the temperature stays below freezing, the ice in the soil holds parts of the mountain together like glue.
In the Alps, temperatures have increased significantly over the last few decades. The mountains are rising about 0.3 degrees Celsius per decade, twice as fast as the global average. And the altitude where freezing continues all year round is rising rapidly. According to the Swiss Meteorological Office, during the summers from 1961 to 1990, subzero altitudes in the Alps were typically 11,000 feet. In 2022, it will reach an all-time high of 17,000 feet.
As the ground warms, the permafrost ice melts and the soil melts. Landslides and rockfalls are more frequent as the soil collapses and is pulled apart. “No more glue,” says Antonella Senese, her researcher in glaciology and climate sciences at the University of Milan in Italy. For buildings at high altitudes, deformation from thawing permafrost can destabilize the foundation and cause the entire building to tilt, slip, or collapse. “It’s like building a house [by] You’re drilling a hole in a rock and suddenly you find that the base is on sand.
A comprehensive study of the number of threatened buildings has not been conducted. One reason is that the Alps span her seven countries, each with its own oversight organization. But there is plenty of evidence of damage.In Switzerland, the basis of the RothornThe 75-year-old stone building Jutte leans in the famous mountain resort of Zermatt. Construction crews will rise this summer to build new on more stable bedrock.In Austria, when the authorities decided to demolish Seethalerh and rebuildAt another hut, ütte, they found a 130-foot-wide sinkhole underneath.A similar stroke of fortune prevented casualties when the ground beneath Furusch’s camp fell to the ground (Also known as the bivouac of Alberico Borna) In the summer of 2022, a building on the French-Italian border collapsed. The bivouac fell into a ravine, which happened to be nobody inside the building at the time.
Most of the huts are managed dwellings, ranging from small structures suitable for a few people to large structures accommodating nearly 200 beds, but are not threatened. A 2019 study in the French Alps suggests that permafrost degradation may only affect buildings between 8,800 and 9,500 feet on north-facing slopes and between 9,800 and 11,800 feet on south-facing slopes. it was done. Giacomelli said permafrost-related infrastructure damage is still uncommon, but as temperatures continue to rise, the potential for permafrost thaw could increase even around buildings at these and even higher elevations. Italy’s Alpine Club says it has begun monitoring the condition of Italy’s Margherita Hut, Europe’s tallest building at about 15,000 feet above sea level.
Mountain clubs in several countries have commissioned studies to quantify this issue. The Italian club has asked local chapters to monitor the high altitude huts, and the Swiss Alpine Club will soon publish a comprehensive review of the huts. Preliminary findings show that 56 buildings in Switzerland are located on or near permafrost-rich soil. Ulrich Delang, Head of the Hut and Environment Department at the Swiss Alpine Club, said: He and his colleagues are a little apprehensive about widespread permafrost change and the amount of research still needed to determine what will happen. Will it still have that place 30 years from now?” he says. “Or should some places be returned to nature?”
Some experts lean towards the latter. “The situation is serious,” says Luca Gibello, president of the Cantieri d’Alta Quota (“Highland Construction Sites”), an Italian group that raises awareness of mountain huts and camps. He is also an architect and an amateur climber who has climbed 79 of the Alps’ 82 peaks over 13,000 feet. “It’s not just a matter of strengthening or upgrading buildings,” he says, Gibello. “The problem is that we lack predictive models to understand what’s going to happen in five, 10, 15 years,” he said when the architect designed his Go I rememberFrance’s ûter Hut, which opened in 2013 as the tallest place in the country, only ensured that the building remained stable for decades. What happened after that was unpredictable.
Alberti says that if some of the huts are not replaced, experiencing the mountains today will become less safe, less enjoyable, and in some cases nearly impossible. ,” he says. “They watch the changes, they tend the trails, they provide shelter.” After all, it was he who understood what was happening to Rifugio Casati. For Alberti, closing the hut and gaining access through it feels like a personal loss. During high altitude expeditions in his youth, he rescued a woman in distress and later married her.
Gibello suspects that the spirit that built the hut—military, researchers, and mountaineers—has vanished. “Perhaps we’re in an era of total accessibility where everybody can go anywhere…perhaps we should house it,” he says. We should think that they should go away, just as they came into the world.”
