All articles tagged with #permafrost
Thawing Arctic permafrost is releasing significant amounts of methane and carbon dioxide, fundamentally altering global climate models. This process creates a self-reinforcing feedback loop where warming accelerates thaw, which releases more greenhouse gases, potentially sustaining higher temperatures for decades or centuries. Scientists emphasize that immediate emission reductions are critical to slowing this irreversible cycle.
Geologists have mapped hidden ice in Utah’s Mount Timpanogos rock glaciers, estimating about 396 million gallons (roughly 600 Olympic-sized pools) of ice with an average thickness of about 61.7 feet, and found evidence ice is still forming. These climate-resilient water stores could help inform future drought management and account for a large share of the state’s freshwater supply.
A first scientific assessment attributes the Aug. 26 Nepal–Tibet disaster to human-caused warming that thaws permafrost, thins glaciers, and brings more rainfall, preconditioning a Langtang Lirung slope collapse that triggered a 22-km debris flood. Nepal aims for about $20 million from the UN Loss and Damage fund, while researchers call for integrated monitoring of glaciers, permafrost, slopes, rivers and weather to better predict such cascading disasters and bolster climate-justice diplomacy at the UN General Assembly.
A World Weather Attribution team says Nepal’s devastating August flood was not caused by a single event but by a cascade of climate‑driven factors: a Langtang Lirung rock–ice collapse likely weakened by a 2015 earthquake, thawing permafrost and glacier melt that increased water and rock pressure, and unusually warm regional conditions that intensified slope destabilization. July–August temperatures are about 1.5°C warmer locally and annual temperatures around 2°C higher, with the zero-degree line rising in the Himalayas. The flood roared more than 20 miles downstream, killing at least 1,300 and leaving more than 5,000 missing. The scientists say human‑caused climate change preconditioned the disaster and warn that current early‑warning systems couldn’t have foreseen it; cutting fossil fuel pollution is needed to avert more such events.
A mammoth-ivory hunter retrieved a roughly 40,000-year-old wolf head from thawing Siberian permafrost, with fur, whiskers and a brain intact. CT scans show no marks from humans or scavengers, suggesting natural ice movement detached the neck and preserved soft tissues. The wolf is estimated to have been about a year to 18 months old. The find highlights permafrost’s extraordinary preservation of Ice Age life and complements broader ancient-wolf genetic research revealing extensive historical gene flow across the northern hemisphere.
A study near Herschel Island shows that most carbon released from thawing Arctic permafrost is stored in seabed sediments rather than released back to the atmosphere; microbes mainly remineralize about 10% of the sedimentary carbon into CO2, preferring fresh marine carbon over old permafrost carbon, a finding that helps refine climate models, though more research is needed.
A new study warns that natural feedbacks from thawing permafrost, intensifying wildfires, and warming wetlands and lakes could amplify global heating by 20–30% this century, adding about 0.2–0.4C to the global average. The findings suggest climate models may underestimate future warming if these natural emissions aren’t included, though cutting fossil-fuel pollution would still reduce how much extra warming occurs.
New research finds natural climate feedbacks from thawing permafrost, intensifying wildfires, and greenhouse gas release from wetlands and lakes could amplify human-caused warming by 20–30% by 2100, adding about 0.2–0.4°C to global temperatures and not fully captured in climate models, potentially pushing projected warming toward 2.6°C with current policies.
Warming temperatures are driving rapid glacier retreat and permafrost thaw in the Mont Blanc massif, boosting rockfalls and destabilizing steep cliffs. Alpine glaciers in Lombardy have shed more than 40% of their area since 1991, and experts warn this year could see around 400 rock collapses—roughly ten times higher than two decades ago—underscoring how climate change is reshaping the Alps and raising danger for climbers and local terrain.
Canadian researchers combining Arctic fieldwork with glass-flume lab experiments found that river erosion on frozen ground can outpace temperate landscapes: during thaw, water channels through thawed sediment, increasing erosion by about 10x compared with unfrozen conditions. The results, supported by Devon Island field tests, suggest Arctic erosion will intensify as temperatures rise and more river networks form.
Canadian researchers found that river erosion in the High Arctic can accelerate markedly during seasonal thaw, with lab flume experiments and field tests showing sediment erosion about 10 times faster than on unfrozen ground. The mechanism involves a shallow thaw layer that meltwater can’t penetrate through, causing water to split and carry more sediment, reshaping river channels as permafrost thaws. This challenges the idea that frozen ground always slows erosion and highlights the need for year‑round Arctic data as climate warming unfolds. The study was published in Communications Earth & Environment.
A massive ice-and-rock avalanche from Langtang Lirung triggered a devastating flood in Nepal on Aug. 26, 2026; days later, a debris-filled barrier lake formed downstream near Tibet and burst, unleashing a second surge. The events illustrate how warming temperatures, thawing permafrost, and more glacial lakes are raising flood risks in the Himalayas and other high-mountain regions, especially with expanding hydropower and population in flood paths. Improved warning systems and cross-border monitoring—using seismic sensors, multi-channel alerts, and broader hazard checks beyond large glacial lakes—could reduce casualties and inform safer development decisions.
Satellite imagery and experts indicate a glacier collapse unleashed catastrophic floods in Nepal, sweeping through towns like Syapru Besi and leaving debris-filled rivers in its wake. Scientists warn that warming temperatures are melting glaciers and destabilizing permafrost, increasing glacier-related hazards, though attributing the event directly to climate change remains cautious. The disaster underscores the region’s vulnerability and is expected to require years of recovery and resilience-building.
Climate scientist Gustaf Hugelius warns that warming could push vast Arctic permafrost past tipping points, releasing CO2 and methane in a self-reinforcing feedback that could sustain warming for decades or centuries; reducing emissions now is essential to limit permafrost thaw and its climate impacts.
Scientists recovered and sequenced several hundred intact RNA transcripts from Yuka, a woolly mammoth preserved in Siberian permafrost for about 39,000 years. The data show muscle-contraction and metabolic-stress genes were actively expressed near death, suggesting the animal’s cells were responding to stress at the moment it died (likely from a cave-lion attack). The team authenticated the ancient signal using mammoth-specific microRNAs to guard against modern contamination. While this establishes a lower bound for RNA survival under ideal freezing, it’s a single study under favorable conditions and does not imply broad generalizability to other specimens or environments.