Articles tagged with Erosion
Researchers identified unexpected geophysical signals beneath stable continental interiors of South America and Africa, suggesting recent geologic activity. Cratons, ancient rocks on Earth's surface, may have experienced delamination, a process where the denser lower mantle layer peels away from the buoyant upper layer.
Scientists have identified eight locations on Mars with significant water ice deposits, providing insights into the planet's climate history and habitability. The ice is found to be cohesive and strong, with distinct layers that could help understand changes in Mars' climate over time.
A study published in Geomorphology identifies areas with high cliff erosion rates and introduces a new hazard scale to predict impending collapses. The research provides accurate erosion rates for 680 miles of the California coast, highlighting the need for improved models and planning strategies to protect critical facilities.
Geologists can improve estimates of landscape erosion and sediment dispersal by accounting for factors like bedrock material erosion rates, zircon fertility, and sediment recycling. Researchers collected zircon grain samples from modern river watersheds in the Andes Mountains to test these assumptions.
A recent study by Penn researchers reveals that the Brazil nut effect plays a crucial role in explaining how rivers resist erosion. The phenomenon, where larger particles tend to rise to the top of mixtures, helps create an armor-like layer on riverbeds, protecting them from excessive erosion. This finding has significant implications ...
Scientists have developed a computer model that uses past wave observations and beach assessments to forecast coastal erosion and/or accretion over the coming year. The new tool provides a traffic light system based on storm severity, highlighting the level of action required to protect particular beaches.
Researchers develop a new material with nanohydroxyapatite and green tea polyphenol EGCG to combat tooth sensitivity. The material plugged dentin tubules, released EGCG for 96 hours, and prevented biofilm formation, showing low toxicity.
Climate change projections indicate that Japan's coastal zones will experience significant beach erosion due to rising sea levels and increased wave heights. The study suggests that beach-loss rates may reach as high as 83% by 2100, posing a significant threat to coastal management.
Researchers at Tel Aviv University discovered basin-wide erosion rates incompatible with known tectonic and climatic regimes of the period. The findings indicate that human impact on the environment began significantly affecting the Earth's geology around 11,500 years ago.
Researchers discovered that microorganisms initiate beachrock formation, providing a natural coastline stabilisation strategy for vulnerable sandy beaches on coral reef cays. This finding could help protect unique habitats and prevent erosion of these critical ecosystems.
A recent study challenges GIS credibility in assessing shoreline erosion to archaeological sites, highlighting the need for more current imagery sources and semi-regular updates. The research suggests that while GIS can be useful in identifying areas at risk, its limitations due to volatile weather conditions must be acknowledged.
Researchers found that minimizing soil disturbance, ensuring permanent organic cover crops, and diversifying crops through crop rotation improved soil properties. These techniques created a beneficial environment for microorganisms, fungi, and earthworms, ultimately leading to increased crop productivity and reduced erosion.
Changes on Comet 67P's surface were likely driven by seasonal events, according to a new study. The comet's surface has been shaped over time through cometary-specific weathering, erosion, and transient events.
Researchers found that rivers in regions with high erosion rates transport more sediment, which adjusts the channel geometry to moderate flows. This challenges the threshold channel model, which predicts a specific grain size range for gravel-bedded rivers.
Researchers assess seasonal beach behavior for 29 beaches along the Pacific coast, finding 76% above normal erosion during the 2015-16 El Niño winter. The study highlights the increasing vulnerability of California's coastline to coastal hazards as climate events intensify.
A new Penn-led study found that invasive sedge is more effective at preventing erosion of dunes during big storms compared to native grass. The research suggests that land managers may want to consider the virtues of non-native species when protecting coastal communities.
The Arctic coast's thawing permafrost leads to increased erosion, releasing greenhouse gases and nutrients into the sea. This alters ecosystems, affects traditional fishing grounds, and impacts the Arctic population's way of life.
Researchers from GFZ GeoForschungsZentrum Potsdam developed a new method called 'erosion painting' to visualize erosion rates. By applying paint patterns on rock surfaces and monitoring their removal over time, scientists can analyze the spatial distribution and intensity of erosive processes.
The Alps are steadily uplifting at a rate of 1-2 millimeters per year, with the majority of this movement attributed to the loss of the Last Glacial Maximum (LGM) ice cap. Researchers have found that 90% of today's uplift is due to the thawing of ice, rather than tectonic activity or erosion.
A pilot study suggests that some heart attack patients with plaque erosion may benefit from anti-thrombotic medications only, potentially replacing stent placement. The conservative approach shows promise in reducing stent-related complications, offering a new treatment paradigm for over a quarter of patients.
Researchers built a stream table experiment to test a theory about the erosion of the Tarim Basin's flat surfaces. They found that channel switching played a crucial role in beveling these areas due to rapid changes in sediment flux and water flow. The study provides insights into the geological history of the region.
A new study by Dr. Georgina King and her team has disproved the idea that surface processes control tectonic deformation in the eastern Himalayas. The research reveals that changing tectonics, rather than climate, drives erosion rates in this region.
A meta-analysis of 54 studies finds engineered hard shorelines reduce species diversity by 23% and overall organism abundance by 45%. Shoreline hardening, including seawalls, can sever habitat connections and alter sediment transport.
The August issue of Lithosphere presents papers on Tyrrhenian margin neotectonics in Italy, the Wrangellia composite terrane in Canada, and fault-related fissures in Wales. These studies provide new insights into Quaternary travertine deposits, thermochronology data, and paleofluid circulation in faults.
A study by American University Economics Professor Boris Gershman found a negative correlation between witchcraft beliefs and trust, eroding social capital and cooperation. In regions with widespread witchcraft beliefs, mistrust and property destruction are common, stifling economic progress.
Researchers found that large storms move about 50% more sediment than typical rainfall, but the overall contribution to erosion is smaller. River channels adjust their size to accommodate flow, setting a speed limit on erosion.
Researchers found that moderate floods have a significant impact on river shaping, increasing erosion rates. However, extreme floods have limited additional effect on channel geometry, suggesting that landscapes can stabilize over long-term climate shifts.
A new study from Queen Mary University of London found that historic UK landfills in England and Wales contain high levels of contaminants that could harm marine life if eroded or flooded. The analysis of two landfill sites in Essex revealed pollutants at concentrations exceeding marine sediment quality guidelines, posing a significant...
New research finds that chemical weathering can weaken rock structures in river beds, making them more susceptible to erosion. The study reveals a positive feedback loop where high precipitation rates maintain high erosion rates despite continuously exposing 'fresh rock'.
Researchers found that meltwater streams on Greenland's ice sheet erode channels at a rate of up to 10 centimeters daily, similar to river erosion patterns. This discovery provides a new tool for studying melt rates and glacial response to climate change.
Researchers study coastal uplift and erosion in Northern California, discovering rivers cut down hillslopes, triggering landslides that balance uplift. Landslides also deliver resistant rocks to rivers, delaying erosion, with implications for landscape evolution and hazards like landslides.
Heavy rainfall causes gullies to expand rapidly, with predicted climate change increasing rates up to three times faster. Researchers have developed a model to predict gully expansion and warn of devastating consequences for agriculture, water quality, and infrastructure.
Numerical simulations found that erosion played a key role in driving magma production and subsequent volcanic activity at the end of the last ice age. The study's results may have implications for understanding climate change and atmospheric CO2 levels, as similar mechanisms are expected to occur at shorter timescales.
Researchers found that waves driven by moderate storms cause the most loss in salt marshes, not severe events like hurricanes. This knowledge brings new tools for managing and restoring wetlands, enabling predictions of erosion based on wind and wave climates.
Researchers have discovered that climate-induced glaciation during ice ages can wear down mountains at a rate comparable to plate tectonics' ability to build them. Over a million-year period, erosion accelerated sharply due to global climate cooling, outpacing mountain building by 50-80 percent.
Researchers found that the region was a frost-covered grassy landscape with erosion rates up to 2.5 higher than today's, suggesting colder temperatures and faster erosion during the last ice age. The study provides new insights into how non-glaciated terrain across North America was formed.
Erosion caused by glaciation during ice ages can wear down mountains faster than plate tectonics can build them, according to a new study. The research, conducted over more than a decade, revealed that erosion rates accelerated sharply about 1 million years ago when global climate cooling triggered stronger and more persistent ice ages.
Researchers measure mountain range material flow and find glacial erosion accelerates faster than tectonics can rebuild mountains. Climate fluctuations play a pivotal role in shaping Earth's landforms, with erosion rates outpacing tectonic inputs by up to 80%.
A groundbreaking international study has revealed that mountain ranges actively evolve with the Earth's climate, responding to changes in temperature and ice cover. The research found that erosion accelerated sharply during global cooling periods, wearing down mountains faster than plate tectonics can build them.
Research led by University of Cincinnati geologist Eva Enkelmann shows a strong relationship between global and local climate change and mountain range tectonic plate shifts. The study found that climate-driven erosion can influence tectonics, changing the motion of rocks in affected areas.
A large study of UK professional footballers found that nearly 4 out of 10 have active tooth decay, while 1 in 20 has irreversible gum disease. This poor dental health is affecting performance and wellbeing among players, highlighting the need for regular screening and preventive approaches.
Floodwaters in Vermont (2011) and Colorado (2013) highlighted the impact of downstream increases and decreases in stream power on erosion and sedimentation. The study successfully predicted river channel and floodplain responses in almost 90% of cases, revealing the potential role of downstream changes in stream power.
Researchers analyzed Yellow River sediment to reconstruct global climate and topography history. They found that the Loess Plateau acts as a sink for Yellow River material eroded from the Tibetan plateau, contradicting previous expectations.
A new study has identified a law for glacial erosion that captures variability in different climate zones. The results show that fast glaciers are more effective landscape gougers than slow-moving ones, explaining lower long-term erosion rates in Polar Regions.
A recent study uses color fingerprinting to identify the origin of sediments in the South Tobacco Creek watershed. The technique reveals that nature is more often responsible for sedimentation than previously thought, while human activities have a significant impact on hydrology and erosion.
A new study finds that the lag time between rock uplift and river erosion in the Tibetan Plateau was just 2 million years or so, making them relatively synchronous events. The researchers used fission track dating to determine the timing of these events and shed light on the geological history of the region.
New study reveals lag time between rock uplift and river erosion in the Tibetan Plateau was just 2 million years, making them relatively synchronous events. Scientists used fission track dating to measure temperature-sensitive events in rocks and found increased erosion rates fourfold to eightfold in the late Miocene.
Research sheds light on the kinematic evolution of the Himalayan orogen, uncovering cryptic thrust-sense discontinuities that help understand processes in continent-continent convergent margins. The Klamath Mountains' unroofing process is also explored, revealing a new mechanism to produce plate margin orogens.
Researchers found that climate-driven erosion influences the age and abundance of exposed copper porphyry deposits globally. The study used data on the age and number of exposed deposits to compare with climate patterns, revealing a strong connection between erosion rates and deposit distribution.
A recent study by Kristin Morell and colleagues reveals the Himalayan Front's central seismic gap is overdue for a major earthquake. The researchers used geomorphic and erosion rate data to define the active detachment fault likely to host a large earthquake, pinpointing a distinctive physiographic transition in Uttarakhand, India.
Scientists found that sediment size in Himalayan river is larger during summer monsoon, revealing relationship between landslides and erosion. The study suggests that coarse material may be lost en route to the ocean, raising questions about sediment origins.
Researchers used a new computer model to simulate the formation of high-lying valleys in the southeastern Tibetan plateau. They found that these valleys developed in place, not as remnants of former lowlands, and were shaped by river disruption due to tectonic movement.
A new study by Duke University researchers suggests that ending federal beach nourishment subsidies could lead to a rapid and dramatic adjustment in coastal property values. Values could erode by up to 17 percent in towns with high property values and almost 34 percent in towns with low property values.
A team of researchers found that the success of marine diatoms over the last 40 million years is linked to increased continental erosion. Diatoms consume massive amounts of carbon from oceans daily, producing organic matter that helps reduce atmospheric carbon dioxide levels.
A new study from the University of Hawaii predicts that coastal erosion in Hawai'i will double by mid-century, threatening thousands of homes and infrastructure. The model takes into account historical changes and projected sea level rise, indicating that shorelines will retreat an average of 16-20 feet by 2050 and nearly 60 feet by 2100.
A computer modeling analysis led by UC Irvine scientists found that levee detonations in 2011 reduced the risk of flooding in a city upstream. The study showed that allowing levees to overtop naturally would have resulted in less erosion and similar damage to crops and buildings.
Researchers at Penn University developed a new model of sediment transport in rivers, showing that even calm rivers creep forward slowly due to particle interactions. The study improves geologists' ability to predict erosion rates and landscape evolution over time.
A University of Central Florida study warns that climate change is eroding beach habitats critical to sea turtle survival, threatening a 30-year conservation success story. The study suggests that armoring beaches with hard structures could harm wildlife, including sea turtles.
A study from Purdue University reveals that invasive species can transform landscapes in various ways, including altering sedimentation rates and changing stream channels. The review highlights the importance of identifying high-risk areas and understanding the impacts of invasive microbial organisms.
Researchers discovered a vast network of lakes and rivers at the Gamburtsev Mountains' base, preserved by thick ice. The study explains how the blanket of ice has halted erosion, stalling aging of the mountains at higher elevations.