Phys.org: Earth science

Deploying ocean iron fertilization—a strategy for carbon dioxide capture—in higher latitudes rather than near the equator could reduce environmental impacts while still achieving removal of carbon dioxide from the atmosphere, according to a modeling study published in Nature. The findings offer insight into best practices for maximizing carbon dioxide removal while reducing potential ecological trade-offs typically associated with iron fertilization.

Towering explosions, flowing bright red lava and heroic scientists battling to save communities at risk have become the defining image of volcanoes in popular culture, from disaster films to epic blockbusters. New University of Bristol–led research has found these cinematic portrayals create a distorted view of how volcanoes behave in the real world.

For communities across the Western Cape, cut-off low weather systems are a familiar threat. They can dump torrents of rain in a matter of hours, flooding roads, damaging homes and infrastructure, and, in the worst cases, causing loss of life. What scientists have long wanted to understand is why some of these storms become so destructive, and researchers at the University of Cape Town (UCT) found that the answer lies far offshore, in the warm waters of the Agulhas Current.

Extreme urban flooding is a growing challenge under climate change, threatening residents, infrastructure and urban systems. However, traditional emergency planning often relies on static population data and fixed facilities, failing to capture how people move during disasters.

Scientists have discovered a new way to determine how big an earthquake may become just seconds after it begins. In a new study published in Nature Communications, researchers from the U.S. Geological Survey (USGS) and Cal Poly Humboldt used signals picked up by fiber-optic cables—the same ones that deliver high-speed internet—to accurately estimate when a moderate to large earthquake is underway using data from the first four seconds of seismic wave arrivals.

Winters in Antarctica's Ross Sea have become stormier in recent decades, affecting sea-ice conditions and field operations, new University of Otago—Ōtākou Whakaihu Waka research shows.

Landslides cause an estimated $3 billion to $6 billion in damage and multiple fatalities annually in the United States. Those numbers could easily increase as housing needs spur development in landslide-prone areas and climate change increases the severity and frequency of heavy rains, which often trigger landslides. Despite the threat, there has never been a systematic, nationwide accounting of who is most at risk from landslides.

On July 23, R/V Kronprins Haakon cast off from the coal quay in Longyearbyen. Around 30 researchers and 20 crew members will spend the next 50 days sailing toward the North Pole as part of the Polhavet 2050 research program.

Could taking plant biomass and burying it in the deep, anoxic parts of the ocean be a workable large-scale strategy for carbon sequestration? The concept has intrigued scientists for years, and now a recent international workshop led by UC Santa Barbara researchers has taken the first steps toward developing it.

Around a quarter of the U.S. food supply is grown in California's Central Valley. Most of its crops, like rice, fruit trees and nut trees, are water-intensive and require extensive groundwater pumping during droughts. Over time, heavy water extraction has contributed to changes in the aquifer systems under the San Joaquin and Sacramento valleys. Although some of these changes can be reversed, a new study, published in the Proceedings of the National Academy of Sciences, indicates that large parts of the Sacramento Valley may have undergone irreversible ground compaction during recent droughts, leading to a permanent loss of groundwater storage.

Most of the carbon released during Canada's record-breaking 2023 wildfire season came from burning soil and peat, rather than trees, according to new research from McMaster University.

Low-level clouds over Earth's oceans play a prominent role in keeping our planet cool by reflecting sunlight away from the surface. But their response to climate change has been hard to model. Now, researchers at Caltech and Google have uncovered important insights into how clouds might respond to warming sea-surface temperatures and rising CO2 levels using a large dataset of simulations developed by the group.

The most severe droughts in the ancient Eastern Mediterranean arose when multiple natural climate cycles coincided, according to a new study from Stockholm University published in Science Advances. The findings shed new light on the climate conditions surrounding the Late Bronze Age collapse and may help improve understanding of future drought risks in a warming world.

Haonan Chen, a CSU associate professor of electrical and computer engineering, and his team have published research that could improve the accuracy of precipitation forecasts up to two weeks in advance.

Many people are familiar with fossilized wood as a decorative item from a museum shop. However, the fact that it can preserve the geological history of entire regions spanning millions of years is a new discovery. A research team led by geologist Dr. Steffen Trümper from the University of Münster has now demonstrated for the first time that fossilized wood is a natural archive from which the geological history of an entire region over hundreds of millions of years can be deduced.

As the planet warms, countries around the world are racing to meet their net-zero targets set out in the 2015 Paris Agreement.

Millions of people living on tropical islands could face a future of increasingly dangerous heat as climate change drives longer and more intense periods of humid conditions. While rising temperatures are often discussed as the main consequence of climate change, humidity plays a crucial role in determining how much heat the human body can tolerate. When the air is already full of moisture, sweat evaporates less effectively, making it harder for people to cool down.

For more than 20 years, about 4,000 autonomous profiling floats have been drifting through the ocean. They form part of the international Argo program (Argo—global array of profiling floats). At regular intervals, they descend to a depth of 2,000 meters (6,600 feet) and, as they rise, measure parameters such as temperature, salinity and pressure. Once they reach the sea surface again, they transmit these data via satellite to the Argo network, which is available to researchers worldwide. Hardly any other observation system has transformed ocean research so profoundly in recent decades.

A new study led by Japanese researchers from Tohoku University and the National Institute for Environmental Studies (NIES) reveals that some of the minerals most essential for green technologies may have a significant negative impact on biodiversity. Using remote sensing and machine learning, the scientists produced an unprecedented global map of mined commodities.

If the Colorado River Basin is the lifeblood of the American Southwest, keeping the region's agricultural, ecological and economic systems thriving, Colorado's West Slope River basins could be considered the heart. Together, they contribute about 70% of the water delivered to Lake Powell, the second-largest reservoir in the nation.