Phys.org: Earth science

As glaciers around the world melt at unprecedented rates, tourism in these icy landscapes is booming, adding pressure to vulnerable regions and disrupting delicate ecosystems. A collective effort, led by UNIL and published in Nature Climate Change, points to ways of balancing tourism with conservation, awareness, and social equity.

About a year ago, researchers at the University of Michigan found that the extratropical cyclones that are the biggest drivers of winter weather in the Great Lakes region are warming and trending northward. That means, outside of the northern reaches of the region, residents can expect that their winters will be warmer and wetter on average.

Around the Balkan Peninsula, the African plate is sinking beneath the European plate. A piece of deeply submerged African crust resurfaced 40 million years ago far away from the sinking zone. How this phenomenon of so-called vertical extrusion can be explained and whether the Rhodope mountain range in southern Bulgaria was formed in this way is a matter of scientific debate. Dr. Iskander Muldashev and Professor Thorsten Nagel from the TU Bergakademie Freiberg have now shown how this process works in a recent publication in the journal Geology. The formation of the Rhodopes was only 40 million years ago—the mountain range is therefore 30–50 million years younger than previously assumed.

Methane is a powerful greenhouse gas with strong heat-trapping capabilities. Although there is less methane in the atmosphere than carbon dioxide, the foremost greenhouse gas, researchers attribute 30% of modern global warming to methane. Observations show that methane levels have increased over time, but the factors driving changes in the rate of accumulation remain unclear.

From 1948 to 1953, a gold mine called Giant Mine released about 5 tons of arsenic trioxide per day into the environment around Yellowknife, Northwest Territories, Canada. Emissions declined from the 1950s until the mine closed in 2004, but the surrounding landscape remains highly contaminated with arsenic.

After major disasters, public debate often treats them as unexpected or unprecedented. This reaction is not necessarily about the absence of warnings. It reflects how societies process shock—and how authorities often explain disruption as unavoidable, rather than the result of earlier choices.

As glaciers around the world continue to shrink and disappear, they are drawing more visitors than ever, not only for their beauty but for what they have come to represent in an era of climate change. A new study co-authored by Rice University anthropologist Cymene Howe examines this phenomenon, showing how melting glaciers have become powerful destinations for tourism, sites of collective grief and symbols of political meaning even as their loss threatens the communities that depend on them.

Africa's coastlines are under growing threat as sea levels climb faster than ever, driven by decades of global warming caused by human activity, natural climate cycles, and warming ocean waters. Between 2009 and 2024, the continent experienced a 73% increase in sea-level rise, according to a recent study published in Communications Earth & Environment.

A new study involving researchers from Oxford's Department of Earth Sciences has finally solved the mystery of what caused the collapse of an Ancient Chinese civilization—finding that widespread flooding was to blame. The findings have been published in National Science Reviews.

Using advanced computer simulations, researchers from the University of Rhode Island's Graduate School of Oceanography (GSO) have concluded how and why strong ocean currents modify surface waves. "Our primary finding is that hurricane-generated ocean currents can substantially reduce both the height and the dominant period of hurricane waves," said Isaac Ginis, URI professor of oceanography. "The magnitude of wave reduction depends strongly on how accurately ocean currents are predicted. This highlights the importance of using fully coupled wave-ocean models when forecasting hurricane waves."

The western U.S. is a geologists' dream, home to the Rocky Mountains, the Grand Canyon, active volcanoes and striking sandstone arches. But one landform simply doesn't make sense.

Hybrid climate modeling has emerged as an effective way to reduce the computational costs associated with cloud-resolving models while retaining their accuracy. The approach retains physics-based models to simulate large-scale atmospheric dynamics, while harnessing deep learning to emulate cloud and convection processes that are too small to be resolved directly. In practice, however, many hybrid AI-physics models are unreliable. When simulations extend over months or years, small errors can accumulate and cause the model to become unstable.

With the departure of the research vessel Polarstern from Punta Arenas (Chile) scheduled for this weekend, the "Summer Weddell Sea Outflow Study" (SWOS) international expedition will commence. Up to early April, a multidisciplinary international research team will investigate the northwestern region of the Weddell Sea—an area of central importance for the global climate and ocean system, but one that can only be explored on site by research icebreakers such as Polarstern due to challenging sea ice conditions.

When and how quickly can ecosystems "tip" and how will they develop in the future? Researchers from the University of Potsdam, the Potsdam Institute for Climate Impact Research, and the Technical University of Munich have developed a new method for measuring how close an ecosystem is to a catastrophic tipping point. They are applying their findings to predict glacier surges, as well as rapid changes in other ecosystems. They have now published their study in Nature Communications.

A UT San Antonio-led international research team has identified chitin, the primary organic component of modern crab shells and insect exoskeletons, in trilobite fossils more than 500 million years old, marking the first confirmed detection of the molecule in this extinct group.

Researchers at Kyoto University have proposed a new physical model that explores how disturbances in the ionosphere may exert electrostatic forces within Earth's crust and potentially contribute to the initiation of large earthquakes under specific conditions. The study does not aim to predict earthquakes but rather presents a theoretical mechanism describing how ionospheric charge variations—caused by intense solar activity such as solar flares—could interact with pre-existing fragile structures in Earth's crust and influence fracture processes.

Earth's surface is covered by more than a dozen tectonic plates, and in subduction zones around the world—including the Japanese Islands—plates converge and dense oceanic plates sink into Earth's interior. These regions, especially plate boundaries, are known for frequent seismic activity.

Southern California's beaches have grown more than 500 acres over the past four decades despite being one of the most heavily urbanized and dammed coastal regions in the world, according to a new study conducted by researchers at the University of California, Irvine, the U.S. Geological Survey and other institutions. The conventional wisdom-challenging revelation about coastal erosion and replenishment is the subject of the study published recently in Nature Communications.

A new study led by Prof. Xiao Wenjiao from the Xinjiang Institute of Ecology and Geography of the Chinese Academy of Sciences sheds light on the ore-forming process and key mechanisms of the gold deposit in the South Tianshan of northwest China. The research was published in the Geological Society of America Bulletin on Jan. 20.

The magnitude 6.9 earthquake that took place in 2018 on the south flank of Kīlauea on the Island of Hawaiʻi may have stalled episodes of periodic slow slip along a major fault underlying the volcano, according to a new study by scientists at the U.S. Geological Survey.