Rhone Glacier, Switzerland — The once-mighty rivers of ice carving through Switzerland’s Alps are melting fast, and the evidence is both striking and sobering. From new crevasses and collapsing ice shelves to entire villages at risk, Switzerland’s glaciers are sending a clear message: the climate crisis is no longer a distant threat — it’s here.

Glaciologist Matthias Huss calls glaciers “the ambassadors of climate change,” and standing atop the sun-soaked Rhone Glacier — which feeds the famous river flowing through Switzerland and France — it’s easy to see why. As the ice slushes and drips beneath his feet, Huss drills deep into the glacier to track how fast it’s disappearing. The answer? Too fast.

A Race Against the Melt

Switzerland is home to roughly 1,400 glaciers, making it the glacier capital of continental Europe. These icy reservoirs provide more than scenic beauty — they supply drinking water, irrigate crops (including the vineyards of France), and fuel hydroelectric plants that power most of the country.

But climate change has already claimed an estimated 1,000 smaller glaciers, and the larger ones are not far behind. In some areas, scientists are turning to extreme methods like wrapping glaciers in giant thermal blankets in a desperate attempt to slow the melt.

“We’re seeing things we didn’t even expect,” said Huss, who leads the GLAMOS glacier monitoring group at ETH Zurich. One alarming trend? Glaciers are now melting not just from the top — due to sun and warm air — but also from below, as wind and air currents hollow out the ice from within. “Some of these air channels are carving out massive cavities beneath the surface,” he explained. “When the roof collapses, it’s dangerous and unpredictable.”

Climate Change You Can See

Glaciers are often romanticized — picture-postcard symbols of alpine beauty. But Huss says that makes them powerful messengers. “People know glaciers from holidays, from memories,” he said. “They’re beautiful, but now they’re vanishing — and that makes climate change more real for people.”

The bigger picture is even more troubling. Scientists estimate that up to two-thirds of the world’s glaciers could vanish by the end of the century unless carbon emissions are drastically reduced.

Huss is clear: the only way to save the glaciers is to cut CO2 emissions. “Blankets and drills might buy us time,” he said, “but the real solution is emissions reduction. Everyone has a role to play.”

When Glaciers Turn Dangerous

That urgency became all too real in May, when the Swiss mountain village of Blatten was nearly wiped out by a massive landslide. The culprit? A rare advancing glacier.

Unlike most of its retreating cousins, the Birch Glacier had been rapidly surging forward. Just before the collapse, it was moving at about 10 meters — over 30 feet — per day. Huss called that speed “completely unsustainable.”

Although villagers had been evacuated ahead of time, the slide destroyed dozens of buildings, leaving only a few rooftops visible. Data later showed that rocks had piled up on the advancing glacier, triggering the deadly slide. Huss said this combination of advancing ice and external pressure created a perfect storm — one no one predicted.

“Three weeks ago, nobody could have imagined the entire village would be gone,” he said. “That’s the biggest lesson: the unexpected can — and will — happen. And we need to be ready.”

The Takeaway: It’s Time to Act

From breathtaking beauty to catastrophic collapse, Switzerland’s glaciers are at a tipping point — and they’re making it harder to ignore the urgency of climate change.

“These glaciers won’t be saved overnight,” said Huss, “but the choices we make now will determine whether they’re around for future generations. We can still act — and we must.”

Source: AP News – Photos show Swiss glaciers’ uncertain future as ‘ambassadors of climate change’

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The past year broke records as the hottest in history. Oceans boiled, glaciers melted at alarming rates, and scientists were left puzzled about the speed of the temperature rise. While greenhouse gas emissions and the natural El Niño phenomenon were known contributors, they didn’t fully account for the extraordinary heat.

A new study published in the journal Science has identified a critical missing piece: clouds—or rather, the lack of them.

The Role of Clouds in Earth’s Climate

The study reveals that a significant drop in low-lying clouds over the oceans has accelerated global warming. These clouds reflect sunlight back into space, helping to cool the planet. Without them, more sunlight is absorbed, intensifying the heating effect.

In simple terms, fewer low clouds mean the planet has “darkened,” absorbing more solar energy, according to Helge Goessling, a climate physicist at Germany’s Alfred Wegener Institute and one of the study’s authors.

This phenomenon is linked to albedo—the ability of Earth’s surfaces to reflect sunlight. Since the 1970s, Earth’s albedo has been declining due to melting ice and snow, which expose darker surfaces like land and ocean that absorb more heat. The reduction in low clouds compounds this effect, driving temperatures even higher.

Alarming Decline in Low Clouds

Using NASA satellite data, weather records, and climate models, the researchers found that low cloud cover hit record lows last year, especially over the North Atlantic Ocean. This decline aligns with a decade-long trend, suggesting a troubling pattern.

However, the exact causes remain unclear. “This is such a complex beast and so hard to disentangle,” Goessling said, pointing to several possible factors:

1. Reduced Shipping Pollution: New regulations have reduced sulfur emissions from ships, a positive step for health but one that inadvertently reduces cloud brightness and cooling effects.
2. Natural Climate Variations: Changing ocean patterns could also be playing a role.
3. Global Warming: The most concerning factor is the planet’s rising temperature. Low-level clouds thrive in cool, moist conditions. As surface temperatures increase, these clouds thin or disappear, creating a feedback loop that accelerates warming.

The Bigger Picture: More Intense Warming Ahead?

If global warming is indeed driving the decline in cloud cover, future temperature projections may be underestimated. “We should expect rather intense warming in the future,” Goessling warned.

Mark Zalinka, an atmospheric scientist at the Lawrence Livermore National Laboratory, likened clouds to Earth’s “sunscreen.” Even small changes in cloud cover can significantly impact the planet’s albedo.

Tapio Schneider, a climate scientist at Caltech, emphasized the gravity of the findings. If global warming is substantially reducing cloud cover, we could face stronger and faster warming than previously predicted.

Why Clouds Are Crucial to Climate Science

Despite their apparent simplicity, clouds are among the most complex and least understood elements of climate systems. They remain, as Goessling describes, “one of the biggest headaches” in climate science.

Understanding how clouds respond to global warming is critical. “It literally determines how much future warming is in store,” Zalinka said.

This research underscores the urgent need for better climate modeling and action. If we are already underestimating the pace of warming, the time to act is now.

Source

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