Articles tagged with Erosion
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Researchers found a surprising correlation between West Antarctic Ice Sheet retreat and marine algae growth over the past 500,000 years. The study suggests that global warming may lead to reduced CO2 uptake if the ice sheet continues to shrink.
Researchers find ocean sediment supply crucial for salt marshes to keep pace with rising seas. Southern New England marshes are showing signs of stress due to declining coastal sediment supply.
A new study found that land and ocean weathering processes are linked, influencing the amount of carbon stored or released into the atmosphere. The research proposes a continuum approach to studying weathering reactions on both land and in the ocean.
A new Stanford study suggests that unvegetated meandering rivers can leave sedimentary deposits similar to those of braided rivers, rewriting the story of plants and rivers' relationship with Earth. This finding has implications for understanding Earth's ancient and future climate, including carbon storage in floodplains.
A global analysis using machine learning predicts glacial erosion rates for 180,000 glaciers worldwide, with most experiencing erosion between 0.02-2.68 millimeters per year. The study identifies complex factors influencing erosion, including temperature, water under the glacier and rock type.
An international team of researchers proposes that a meteorite impact just west of Winslow, Arizona, created Meteor Crater and triggered a massive landslide in the Grand Canyon. The study found evidence of a paleolake forming at the same time, with driftwood dating back to around 55,000 years.
A new study from Tulane University reveals that parts of New Orleans are sinking at an alarming rate, with some areas experiencing up to 2 inches of elevation loss annually. The findings highlight the need for ongoing monitoring and maintenance to ensure the city's flood defenses remain effective.
Researchers confirm human presence in the Americas between 23,000 and 21,000 years ago with a new study that uses ancient mud to date footprints. The findings contradict previous understanding of the peopling of North America and have sparked a reevaluation of archaeological theories.
Scientists have discovered that channels carved by rivers have distinct curves compared to those cut by lava or ice. The research could be used as a diagnostic tool for sinuous channels on other worlds with unknown fluid origins.
A USC study has found a drastic increase in building collapses in Alexandria, Egypt, due to rising sea levels and seawater intrusion. The researchers used a three-pronged approach to assess the impact of shoreline changes on the city's buildings.
A research team from the University of Göttingen investigated the influence of the Zagros Mountains on Earth's surface bending. They found that the Neotethys oceanic plate is breaking off horizontally, creating a depression in the region.
A new study reveals that a colossal 'megaflood' refilled the Mediterranean Sea around 5.97-5.33 million years ago, marking the end of the Messinian Salinity Crisis. The Zanclean Megaflood is believed to have had discharge rates and flow velocities dwarfing any other known floods in Earth's history.
Researchers found that restoring coastal marshes can significantly help protect coastlines at a reasonable cost. A study by MIT graduate student Ernie I. H. Lee and professor Heidi Nepf shows that enhancing salt marshes in front of protective seawalls can reduce construction costs while still providing adequate protection from storms.
A new Stanford review of hundreds of studies found little to no sediment dating back to the 34 million-year-old Eocene-Oligocene climate transition, contradicting conventional models. The researchers attribute this globally extensive gap in the geologic record to vigorous ocean bottom currents triggered by major climate shifts.
Researchers mapped a giant underwater avalanche that grew 100 times in size, eroding a 400km canyon and traveling 2000km across the Atlantic Ocean seafloor. The event was so powerful it carried boulders over 130m up the side of the canyon.
A research team finds that local community members are indispensable partners in enhancing community engagement in repairing damaged ecosystems. Local values and attitudes play a crucial role in promoting sustainable ecosystem management practices.
Researchers used simulations to model the erosion of Titan's shorelines, finding that waves are the most likely explanation for the moon's lakes and seas. The team found that wave activity could have shaped the coastlines of lakes and seas on Titan.
Researchers evaluated the impact of hydroelectric project construction on regressive erosion and land use/land cover changes in Ecuador's Coca River. The study found an acceleration of regressive erosion post-CCSHP implementation, affecting fluvial dynamics and environmental protection.
A USC study finds that rising sea levels and urban development are accelerating coastal erosion in Southern California, with predicted costs tripling by 2050. Beach nourishment projects will become increasingly costly due to the global increase in sand prices.
A new study finds that mountains can switch from being a sink of carbon dioxide to a source as their erosion rate increases. The optimal erosion rate for maximizing carbon dioxide removal through mineral weathering is approximately 0.1 millimeter per year.
Research reveals that low-relief mountain ranges with moderate erosion rates have the highest CO2 capture through silicate weathering. In contrast, high-eroded regions release more CO2 due to faster carbonate and sulfide weathering. These findings suggest a complex relationship between erosion rates and the carbon cycle.
A team of geologists from the University of Colorado Boulder has made a breakthrough in understanding the emergence of the Spanish Peaks. The study reveals that the peaks first formed around 24 million years ago when magma welled up from deep within Earth's crust, but didn't break through to the surface until about 17 million years ago.
A new study reveals that the protective effect of income has largely eroded in affluent neighborhoods over the past 40 years. This means that even if residents have more wealth, they won't be able to enjoy cooler temperatures as climate change worsens.
Researchers uncover 10 new trilobite species in Thai sanctuary, shedding light on Cambrian-Ordovician period and connecting Thailand to parts of Australia. The discovery helps date the age of fossils and better understand global geography.
Researchers use rhenium as a proxy for carbon to quantify the rate of fossil carbon dioxide release into the atmosphere. The study found that high rates of carbon breakdown persist from mountaintop to floodplain, offering valuable insights into the planet's history and response to climate challenges.
UBC Okanagan researchers have developed sensors that can detect erosion and breaches in protective coatings, reducing inspection time and error risk. The AI-enabled sensors can also distinguish individual layer erosion within multi-layer coatings, enabling proactive monitoring and addressing of equipment degradation.
A new study suggests that emphasizing the need for energy independence and environmental stewardship could change people's minds about climate change. The research found that those who deny climate change often focus on personal experiences and local issues, but may not be aware of the scale of the problem.
A new study reveals massive urban expansions throughout the contiguous US, particularly on the Atlantic Coast, have led to significant tidal flat erosion. The research highlights the critical impact of human activities on tidal flat environments, providing important implications for coastal land use and planning.
Vegetation on coastal dunes was found to accelerate erosion during extreme events, contrary to the current understanding that it provides protection. The study found that vegetation creates a physical barrier, decreases wave run-up, and increases water penetration, leading to destabilization and scarp formation.
Researchers at Oregon State University found that newly planted coastal switchgrass on sand dunes can accelerate erosion from extreme waves. The study suggests that vegetation initially creates a physical barrier but also increases water penetration into the sediment bed, leading to destabilization and accelerated scarp formation.
A study suggests that river erosion can drive biodiversity in geologically quiet environments, such as the Appalachian Mountains. The research found that changing landscapes pushed a species of fish into different tributaries, leading to distinct genetic lineages.
A team of scientists, including a University of Central Florida researcher, is developing oyster-based shoreline protection for U.S. coastlines. The project aims to create self-repairing reef-mimicking structures to mitigate coastal flooding and erosion.
A study in Nature Communications Earth and Environment shows progress in Australia's nature-based rehabilitation efforts for sustainable environmental restoration. The research highlights the importance of adopting UN environmental goals as principles in river management to conserve river health and improve resilience.
Researchers used a 3D radar scan to reveal that Malaspina Glacier is undercut by channels, making it more vulnerable to melting and potentially contributing significantly to global sea level rise. The glacier's bulk sits below sea level, and its coastal barrier erodes, allowing ocean water to access the glacier and accelerate its retreat.
Scientists used rare isotopes to study erosion rates in the Andes Mountains, finding that sediments eroded from high mountain watersheds were shielded from cosmic rays for at least 7-15 thousand years. This helps predict where future landslides might occur and understand landslide risks.
Researchers found that Arctic rivers are not moving as quickly as predicted under climate change, with vegetation along the banks becoming more stable. This challenges long-held assumptions about the impact of warming on river dynamics.
Researchers found that the Paleocene-Eocene Thermal Maximum, a 5-8°C warming event, was caused by high carbon dioxide and methane levels. The team's study provides new insights into sedimentary systems and the impact of seasonal changes on ocean turbidity.
Researchers found a signal of extreme climate change from 50 million years ago in turbidite deposits, which are evidence of ancient rapid submarine water currents. This suggests that extreme weather events and exacerbated global climatic conditions can amplify delivery of sand into the deep ocean.
The UN reports that roughly 50,000 large dams worldwide will lose an estimated 23% to 28% of their combined original storage capacity by 2050, resulting in a loss of around 1.65 trillion cubic meters of water. This loss will undermine water security, irrigation, power generation, and other essential services.
A new study found that 70% of Florida’s reefs are experiencing net loss of reef habitat due to erosion. The research highlights the need for enhanced management practices and coral restoration efforts in Florida.
A new study has shown that seagrass can reduce cliff erosion by up to 70% in sandy sediments due to its root mats binding the sand. The researchers also found that replanting seagrass in areas where it has disappeared is essential for mitigating coastal erosion.
A new study models likely future cliff retreat rates of two rock coasts in the UK, finding that rock coasts are likely to retreat at a rate not seen for 3,000-5,000 years. The researchers predict that rock coast cliffs will retreat by at least 10-22 meters inland due to accelerating sea level rise.
Researchers used drones to monitor Waikīkī Beach, finding that wave energy from south swells and trade-wind generated waves drive erosion and accretion. The studies provide insights into beach behavior and help inform management of the coastline for ecological, societal, and economic sustainability.
Researchers from UC Berkeley used rock analysis to determine that the valley's impressive depth was formed since 10 million years ago, with most of it carved in the past 5 million years. The study employed a novel technique called helium-4/helium-3 thermochronometry to reconstruct the temperature history of the rocks.
A new study of coastal geography and a medieval map proposes that two islands in Cardigan Bay, Wales, which are no longer exist, could have come into existence and disappeared due to erosion. The research, published in Atlantic Geosciences, suggests the islands may be remnants of a low-lying landscape underlain by soft glacial deposits.
The study explores the relationship between cohesion and erosion, revealing a scaling law that can predict erosion thresholds for different grain sizes. This understanding could improve modeling of erosion in various applications, such as soil stability and dust removal from solar panels.
Researchers developed an AI method to automatically detect plaque erosion in heart arteries using OCT images. The new technique uses neural networks and post-processing algorithms to predict regions of possible plaque erosion and refine the initial prediction based on clinically interpretable features.
Researchers developed a new theory explaining mountain belt formation, suggesting that internal plate strength limits height and size. Surface processes, including erosion, play a key role in shaping these features.
A new study reveals that tidal flats in the southeastern US are under pressure from urbanization, leading to erosion and loss of these critical ecosystem guardians. The research highlights the need for sustainable management plans to mitigate the impacts of urban expansion on coastal environments.
A new study reveals that soft liquid droplets erode hard surfaces due to a shock wave created by the impact, which spreads out with the dropping speed exceeding sound velocity. This discovery could lead to more erosion-resistant materials for outdoor applications.
A study by University of Texas at Austin researchers found that narrow but deep channels across the coastal plain landscape play a significant role in moving water, particularly during floods. The channel networks covered over 12,000 square miles and were separated into distinct drainage basins.
Researchers found that tectonic processes, not climate changes, drove erosion in the Cauca River canyon. The team used thermochronology and other techniques to analyze rock samples and satellite imagery, revealing a plateau formed ~2.5 km above river level.
Researchers reconstructed bedrock geometry using gravity measurements, finding that glaciers of 'Würm' glaciation mainly widened valleys rather than deepening them. The study also revealed U-shaped cross-sections and asymmetric geometries in overdeepenings beneath Aare and Gürbe valleys.
A new study verifies that ancient glaciers caused the erosion of rocks up to 3 miles thick during the Snowball Earth period, resolving a long-standing debate. The research uses thermochronology to estimate temperature and thermal structure, finding a widespread signal of rapid cooling consistent with massive glacier erosion.
Rapid coastal erosion in the Arctic is driven by permafrost thawing, ground ice melting, and sea surface temperature rises. This leads to increased erosion, water pollution, and loss of habitats for local communities.
A new study reveals that modern top-down climate-related factors combined with traditional bottom-up tectonic models can help uncover the history of the Andes Mountains. The research suggests that a submerged volcanic hotspot chain, known as the Juan Fernandez Ridge, plays a crucial role in shaping the Andes' unique tectonic setting.
A new study estimates that burrowing animals like badgers and porcupines can weaken levees to the point of collapse, causing localized flooding. Dens at higher elevations in a levee are more dangerous than those near the bottom, with potential for catastrophic failure.
A new study led by the University of Colorado Boulder has shed new light on the Great Unconformity, a mysterious gap in the Grand Canyon's rock record that covers hundreds of millions of years. The research suggests that a series of small faulting events may have caused rocks and sediment to wash away, creating the missing window of time.
A pioneering study reveals subglacial lakes in Antarctica harbor thriving microbial life through the erosion of ancient sediments, providing a new source of nutrients and energy for microorganisms. The research found that crushing sediments can produce key gases, including methane and hydrogen, essential for microbial processes.
Researchers have discovered a new style of invisible gold hosted in pyrite crystals with deformation-related dislocations. Additionally, a study reveals the impact of diagenesis on iron speciation in ancient sedimentary rocks, suggesting true euxinia may be less than previously thought. Submarine fans also exhibit dynamic environments ...