Articles tagged with Volcanic Eruptions
A series of large volcanic eruptions between 1808 and 1835 significantly altered the global climate, causing droughts in Africa and increased precipitation in Europe. The study's findings have implications for defining a pre-industrial climate and setting climate targets.
Researchers found that volcanic eruptions in one hemisphere reduce monsoon rainfall in the same hemisphere, while enhancing it in other hemispheres. This phenomenon is attributed to changes in atmospheric circulation, which play a dominant role in rainfall responses.
Researchers from the University of Cambridge used 'crystal clocks' to estimate magma storage times near the Earth's crust-mantle boundary. They found that magma can be stored for over 1,000 years, helping improve models of volcanic eruptions and release of gases.
A new study suggests that super volcanic eruptions could significantly impact ozone layer recovery, with estimated depletions ranging from 2.5% to 6.4%. The research used transport and chemistry-climate models to simulate the effects of super volcanoes on stratospheric ozone during different recovery periods.
A new analysis reveals that energy availability and benign climate conditions played a crucial role in shaping societal development over the past 10,000 years. The study found that abundant energy led to societal expansion and prosperity, while declining energy sources resulted in contraction and collapse.
Researchers discovered unusual rocks in East Africa that provide clues into the hazards associated with active volcanoes. The rocks, formed by intense eruptions, suggest that future eruptions at these volcanoes have the potential to cause significant harm, further from the volcano than previously thought.
A Rutgers-led study found that the massive Laki volcano eruption in Iceland did not lead to an extreme summer heat wave in Europe. Instead, it caused unusually cold winters due to natural climate variability and high-pressure systems. The eruption also had devastating effects on Iceland's livestock and human populations.
Researchers verified that the 29,000-year-old Masseria del Monte Tuff eruption at Campi Flegrei caldera was responsible for widespread volcanic ash layers across the Mediterranean. The study suggests that this large-magnitude event occurred between known caldera-forming events, reducing the recurrence interval of such eruptions.
Tropical volcanic eruptions can shift the intertropical convergence zone, affecting global patterns of tropical cyclone likelihood and intensity. The effects can last for up to 4 years after large eruptions.
Researchers used high-precision dating methods to study the timing and impact of Deccan Traps volcanism on dinosaur extinction. The studies suggest that massive volcanic eruptions could have dramatically altered Earth's climate, triggering mass extinctions before the Chicxulub asteroid impact.
Researchers found that extratropical eruptions produce strong hemispheric cooling in proportion to their sulfur release, contrary to the assumed weaker impact. This study sheds light on the importance of injection height and helps quantify volcanic eruptions' past climate variability effects.
Researchers found evidence of a massive volcanic eruption on Scotland's Isle of Skye that contributed to the Paleocene-Eocene Thermal Maximum, a 5-8°C temperature increase around 56 million years ago. The study uses isotope geochemistry and pitchstone analysis to confirm the Red Hills as the likely vent area for the eruption.
Researchers created a model of the volcanic flank collapse caused by the eruption, predicting maximum wave heights and impact zones. The study aims to improve tsunami preparedness in the United States with advanced models and simulations.
A recent survey in Iceland found that only half of residents evacuated during the 2010 Eyjafjallajökull eruption did so. The researchers argue that a one-size-fits-all approach to evacuations is unlikely to work due to population diversification and changing community dynamics.
Researchers at Imperial College London suggest volcanoes are fueled by solid crystals and magma in small gaps, not molten magma chambers. This new model explains how eruptions occur and has implications for public safety and metal ore deposit formation.
A 3,980-year-old volcanic eruption on Deception Island had a Volcanic Explosive Index of 6 and ejected 30-60 cubic kilometers of ash. The caldera collapse triggered a seismic event and had significant climatic impacts in the southern region.
Scientists have developed a new method and camera to measure the flow and speed of ash particles in volcanic plumes, which can help reduce the risks to human health and infrastructure. The camera, called AshCam, uses sunlight to identify ash particles and provides new insights into volcanic ash dynamics.
A team of geoscientists studied the Taupo Volcanic Zone in New Zealand, finding that smaller eruptions reset magma chambers over decades to centuries. This understanding can aid predictions of similar eruptions and mitigate supereruptions.
Guilherme Gualda and his students studied magma storage-depth evolution in the Taupo Volcanic Zone. They found that magma moved closer to the surface with each successive eruption, likely preventing supereruptions. The dynamic nature of the crust allowed for frequent, smaller eruptions to occur, preventing a massive eruption.
Electrically charged volcanic ash from the 1815 Mount Tambora eruption may have contributed to Napoleon's defeat at Waterloo by 'short-circuiting' the ionosphere. Heavy rain brought about by this ash led to muddy and rainy conditions that hindered the Allied army.
Researchers have found that volcanic eruptions cause different impacts on sea surface temperature (SST) gradients over the equatorial Pacific, depending on their latitude. Northern and tropical eruptions lead to El Nino-like warm SST anomalies in the eastern Pacific, while southern eruptions result in weaker warming anomalies with an e...
Researchers at Rutgers University suggest that nacreous clouds with iridescent colors may have inspired the iconic red-and-yellow sky in Edvard Munch's The Scream. The study provides a detailed analysis of cloud patterns and color content in relation to volcanic sunsets, potentially linking Munch's painting to these atmospheric phenomena.
Scientists developed an AI program to categorize volcanic ash particle shapes, helping provide information on eruptions and aid hazard mitigation. The program achieved a success rate of 92% in classifying basal shapes with probability ratios.
Researchers at the University of Manchester are using 4D scanning technology to predict the behavior of lava flows and volcanic eruptions. By studying crystallization in magmas, they can simulate the behavior of natural lava flows and better understand the hazards posed by fast-moving flows.
Researchers combined geological mapping and analysis to define possible hazard scenarios at Mount Taranaki volcano. The results indicate that future Plinian eruptions could produce different types of pyroclastic density currents, affecting urban areas up to 18 km away from the crater.
Researchers at the University of Bristol used high-resolution meteorological modeling to study volcanic ash transport patterns. They identified how wind flow around the volcano topography controls ash deposit patterns, influencing ash deposition over hundreds of km from St Vincent, including on nearby islands and ships.
A recent study found that the Pacific Walker circulation (PWC) weakens significantly after strong tropical volcanic eruptions (SVEs), leading to changes in rainfall patterns and extreme climate events worldwide. The research suggests that the cooling effect of SVEs on the Maritime Continent plays a dominant role in weakening the PWC.
A team of scientists and medieval historians used ice cores and tree rings to date the Eldgjá volcanic eruption, which occurred soon after Iceland's settlement. The researchers found that memories of the eruption were used to stimulate the Christianisation of Iceland in medieval poem Voluspá.
Researchers created a scaled-down model of an active volcanic plumbing system to study magma flow through dykes. The novel experimental setup revealed the simultaneous measurement of fluid flow, sub-surface deformation during magma ascent, challenging existing thinking on magma flow.
New research reveals that Lake Tahoe's shoreline has shifted due to volcanic activity, with three raised shorelines formed by subaerial lava flows and dammed lake outlets. The lake's level rose nearly 200m after each of these events, raising questions about future volcanic eruptions and their hazards.
Researchers have discovered tiny crystals forming deep in volcanoes can signal impending eruptions, offering hope for more effective evacuations and early warning systems. The study, led by Dr. Teresa Ubide, uses a new laser technique to examine the composition of these crystals, which may hold the key to predicting volcanic activity.
Researchers have found that small crystals in volcanic rocks contain growth layers similar to tree rings, which can record the processes leading up to an eruption. This discovery may lead to more effective volcanic hazard monitoring, including for dormant volcanoes.
A research team led by University of Tasmania and Woods Hole Oceanographic Institution explored the Havre volcano using autonomous underwater vehicle and remotely operated vehicle. They found that the eruption was larger than expected, with more than 70% of volcanic activity occurring on the seafloor.
Researchers find a sudden discontinuity in the flow behaviour of rhyolitic magmas, guiding whether a volcano erupts effusively or explosively. Variabilities at the nanoscale can dramatically increase the explosive potential of volcanoes.
A Rutgers-led study has detected a massive upwelling of warm rock beneath central Vermont and western New Hampshire, contradicting established notions of how continents behave. The phenomenon, revealed through seismic data, is thought to be driven by the movement of tectonic plates.
A team from the University of Bristol analyzed geological records to find that volcanic super-eruptions occur much more frequently than previously estimated, with a new average time between events of around 17 thousand years. This re-evaluation raises concerns about the potential impact on global weather patterns and human civilization.
Researchers from UNIGE and Roma Tre used thermal and experimental models to explain caldera resurgence, a process that prevents volcanic eruptions. The leftover magma behaves like a 'rubber sheet' due to its higher viscosity, stopping the new magma from reaching the surface.
Scientists at the University of Leeds warn that climate change could lead to more frequent volcanic eruptions in Iceland as glaciers melt. The study found a time lag of roughly 600 years between climate events and decreased volcanic activity, suggesting a similar delay may occur with warming temperatures.
A recent study reveals that high-latitude volcanic eruptions can transport sulfate aerosols into the tropical stratosphere, influencing both hemispheres' climates. The research found that favorable atmospheric conditions can enable such long-distance transport, making these eruptions a global concern.
A new study found that future volcanic eruptions could lead to surface cooling of up to 40% due to the oceans' decreased ability to moderate the climate impacts. The increased cooling would disrupt the water cycle, decreasing global precipitation.
A new geological record reveals two closely spaced Yellowstone supervolcano eruptions that cooled the ocean by about 3 degrees Celsius and triggered volcanic winters. The eruptions occurred 170 years apart and coincided with a natural global-warming trend, leading to a major ice age.
Researchers found that ancient volcanic eruptions caused significant melting of the northern European ice sheet, with some eruptions leading to 20 centimeters of ice loss. The study suggests that modern ice sheets may be vulnerable to similar effects, highlighting a potential positive feedback loop between volcanism and climate change.
Researchers caution that relying solely on zircon crystals can skew timescales for geological events, potentially millions of years. The findings have implications for understanding volcanic hazards and predicting future risks.
Researchers discovered a possible reason for Ptolemy III's sudden return home: massive volcanic eruptions. These events cooled the planet's atmosphere, disrupting the Nile River's flow and leading to food shortages and heightened tensions. The study links eruptions to violent uprisings and other upheavals in ancient Egypt.
A recent study has reshaped the understanding of climate change's impact on early societies, focusing on ancient Egypt. The research, published in Nature Communications, explores how large volcanic eruptions affected Nile river flow, reducing summer flood heights and causing social stress that could trigger unrest.
A team of WSU researchers has documented one of the Earth's largest known volcanic eruptions, which occurred in the Pacific Northwest and released massive amounts of sulfur dioxide into the atmosphere. The eruption is estimated to have been equivalent to a Mount Tambora-style eruption every day for 11-16 years.
Explosive volcanic eruptions in the tropics can lead to El Niño events by pumping sulfur dioxide into the stratosphere, reflecting solar radiation and reducing global surface temperature. Climate model simulations show that El Niño tends to peak during the year after large volcanic eruptions.
A team of scientists discovered a global spike in nickel at the time of the Great Permian Extinction, suggesting massive Siberian volcanic eruptions caused significant environmental changes. The eruptions led to intense global warming and depleted oxygen in oceans, contributing to the extinction of over 90% of species.
New findings from the University of Copenhagen reveal that massive Antarctic volcanic eruptions coincided with accelerated deglaciation about 17,700 years ago. These eruptions created a stratospheric ozone hole over Antarctica, leading to large-scale changes in atmospheric circulation and hydroclimate throughout the Southern Hemisphere.
A natural global warming event occurred 56 million years ago, caused almost entirely by volcanic eruptions during Greenland's separation from Europe. The Palaeocene-Eocene Thermal Maximum (PETM) led to a significant increase in atmospheric carbon dioxide and global temperatures.
Researchers found that volcanic eruptions can cause ozone depletion until 2070, despite declining levels of human-made CFCs. Natural sources of halogen gases from marine plankton and microalgae become important in the lower stratosphere after CFC concentrations decline.
Researchers from UNH developed a novel method to estimate the extent of small particles in 3D models, enabling more accurate assessments of their properties. This innovation has practical applications in modeling volcanic ash clouds, sediment transport, and blood test development.
Research finds that sulphate aerosols from the 2014-15 Holuhraun eruption reduced cloud droplet size and caused cloud brightening, providing new insights into their impact on climate. The study suggests that cloud systems are 'well buffered' against aerosol changes.
Scientists have found that magma reservoirs are less liquid and more crystalline than previously thought, with most crystals retaining their structure for tens of thousands of years before being exposed to molten magma. This discovery could help predict when volcanoes pose the greatest risk by identifying those with mobile magma.
Scientists studied zircon crystals to understand magma reservoirs, finding a more solid and crystalline environment than previously thought. The research sheds light on the pre-eruption phase and how mobile magma contributes to volcanic activity.
Researchers analyzed zircon crystals in Taupo Volcanic Zone magma to determine its temperature history, finding a 'cool' period followed by rapid heating. The study's findings may help scientists recognize volcanoes on the verge of an eruption.
ASU scientists develop technique using zircon crystals to trace pulses of heat inside a volcano, which may help better predict risk. The new findings suggest that heat pulses before an eruption both begin and end more abruptly than previously thought.
Research finds magma is more solid than liquid, with crystalline and mushy states existing simultaneously. The discovery could help predict volcano risks by identifying mobile magma.
Large reservoirs of magma stored deep in the Earth's crust trigger 'super-eruptions' by slowly feeding magma into smaller reservoirs. This process can take millions of years, making these events rare.
A study found that a gentoo penguin colony in Antarctica was almost completely wiped out after three large volcanic eruptions over the past 7,000 years. The eruptions from Deception Island volcano had a devastating impact on the population, causing ash fall and burying chicks.