Phys.org: Earth science

The correlation between Arctic wildfires and abnormal snow cover under global warming is of growing concern. A comprehensive quantitative assessment by researchers at The Hong Kong Polytechnic University (PolyU) has shown that increasingly frequent seasonal wildland fires across the Arctic in recent years have delayed snow cover formation by at least five days and could lead to a future 18-day reduction of snow cover duration, with implications for global ecosystems.

How do avalanches affect pylons and other sensitive infrastructure? Using detailed simulations, SLF researcher Michael Kohler has shown that the compressibility of snow initially reduces avalanche pressure, but that at high speeds this buffer suddenly fails.

Globally, toxic algal blooms are becoming more frequent and severe, fueled by a warming climate and nutrient runoff. While satellites can easily spot the green carpets once they reach the surface, the "prequels" to these outbreaks remain hidden in the deep.

Oxygen isotopes data enable researchers to look far back into the geologic past and reconstruct the climate of the past. In doing so, they consider several factors such as ocean temperature and ice volume in polar regions. A new publication by an international team from Bergen (Norway) and Bremen in Nature Geoscience concludes that the Antarctic ice sheet was less dynamic during the Oligocene epoch 34 to 23 million years ago than previously assumed.

NASA astronaut Nichole Ayers captured this image of lightning while orbiting aboard the International Space Station more than 250 miles above Milan, Italy on July 1, 2025.

The extent and speed of ice moving off the ice sheets of Greenland and Antarctica into the sea—an important dynamic for climate and sea-rise modeling—has been captured over a 10-year period by satellites from the Copernicus Sentinel-1 mission.

Alaska's glaciers are melting at an accelerating pace, losing roughly 60 billion tons of ice each year. About 4,000 kilometers to the south, in California and Nevada, records for heat and dryness are being shattered, creating favorable conditions for wildfire events.

Climate change has many culprits, from agriculture to transportation to energy production. Now, add another: the deep ocean salty blob.

Think of the destruction of Earth's rainforests and a familiar image may come to mind: fires or chainsaws tearing through enormous swaths of the Amazon, releasing masses of planet-warming carbon dioxide.

Recent reports of wells drying up in New Hampshire reflect a pattern we're increasingly seeing across New England: extended dry periods and below-normal precipitation are stressing shallow groundwater systems that many homeowners depend on.

The natural sands of beaches along the Firth of Forth are being mixed with significant amounts of human-made materials like bricks, concrete, glass and industrial waste, new research has revealed.

On clear days in Hartbeespoort, South Africa, satellite images often reveal a reservoir with shades of deep blue interrupted by drifting patches of vivid green. These shifting features indicate algae blooms, which can affect water quality, ecosystems, and nearby human communities.

The circumglobal teleconnection pattern (CGT) is a key mode of atmospheric variability during boreal summer, identified by an upper-tropospheric wave train propagating along the subtropical jet. CGT is one of the critical drivers of Northern Hemisphere mid-latitude heat waves. However, how the structure of CGT responds to global warming and its effect on future heat wave characteristics remains inconclusive.

Earth system box models are essential tools for reconstructing long-term climatic and environmental evolution and uncovering Earth system mechanisms. To overcome the spatiotemporal resolution limitations of current deep-time models, a research team has developed CESM-SCION, a new-generation high-resolution climate-biogeochemistry coupled model. This model advances the spatiotemporal resolution of long-term Earth system simulations to a new level and identifies marine regression as a key driver of the Late Paleozoic Ice Age onset.

The Atlantic Meridional Overturning Circulation (AMOC) is the system of currents responsible for shuttling warm water northward and colder, denser water to the south. This "conveyor belt" process helps redistribute heat, nutrients, and carbon around the planet.

The mid-ocean ridge runs through the oceans like a suture. Where Earth's plates move apart, new oceanic crust is continuously formed. This is often accompanied by magmatism and hydrothermal activity. Seawater seeps into the subsurface, is heated to temperatures above 400°C, and rises again to the ocean floor.

The Huíla plateau, bounded by dramatic cliffs and chasms, stands above the arid coastal plains in the country's southwest.

When it rains, it pours. And that's good news for California's water supply.

When we think of global warming, what first comes to mind is the air: crushing heat waves that are felt rather than seen, except through the haziness of humid air. But when it comes to melting ice sheets, rising ocean temperatures may play more of a role—with the worst effects experienced on the other side of the globe.

The first study from GreenDrill—a project co-led by the University at Buffalo to collect rocks and sediment buried beneath the Greenland Ice Sheet—has found that the Prudhoe Dome ice cap was completely gone approximately 7,000 years ago, much more recently than previously known.