Articles tagged with Gravity Waves
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Thousands of scientists will gather to present new research on fluids at the 78th American Physical Society meeting. The conference features a scientific program with thousands of presentations on various fluid dynamics topics.
Researchers from the Faculty of Sciences discover a deeper understanding of Martian climate through analysis of atmospheric waves. The study highlights greater asymmetry between Mars' southern and northern hemispheres, shedding new light on the Red Planet's climate dynamics.
The AWE mission has released its first trove of scientific data, providing unprecedented insight into how weather on Earth affects space weather. The data will help scientists better understand gravity waves and their impact on satellite communications, navigation, and tracking.
A new study reveals that atmospheric gravity waves play a crucial role in driving latitudinal air currents on Mars, particularly at high altitudes. The findings suggest fundamental differences from Earth's middle atmosphere.
Gravity waves generated by Hurricane Helene were recorded 55 miles above the ground using NASA's Atmospheric Waves Experiment. The study helps understand how terrestrial weather affects space weather and disrupts satellites.
A new study published in Physical Review Letters suggests that nanohertz gravitational waves may not originate from supercool first-order phase transitions. Researchers found that such transitions would struggle to complete, shifting the frequency of the waves away from nanohertz frequencies.
A Northwestern University-led team developed the first 3D simulations of energy rippling from a massive star's core to its outer surface. The researchers determined how much stars should innately twinkle and converted these waves into sound waves, allowing listeners to hear both what the insides of stars and their twinkling sound like.
Researchers at Oregon State University found a relationship between surface gravity waves and infragravity waves that fuel sneaker waves. Longer waves with more energy can run further up the beach, but not all long waves turn into sneaker waves.
Research shows that the Southwestern North American megadrought caused a significant reduction (~30%) in wave activity after its onset, which may be related to reduced storm generation and altered precipitation patterns. The findings demonstrate that regional changes in the lower atmosphere can impact the upper atmosphere.
Astronomers have discovered a stellar binary with an extremely short orbit of just 51 minutes, confirming a decades-old prediction. The system is believed to be a cataclysmic variable, in which a white dwarf is accreting material from its companion star.
Scientists have identified possible 'thermal refugia' where coral reefs are more likely to survive warming oceans. An interactive global atlas has been created with locations of these areas, providing a starting point for conservation efforts.
Researchers at Nagoya University used satellite data to track ionospheric disturbances after the 2022 Tonga underwater eruption, detecting earlier signs of tsunami waves. The team found that electromagnetic waves traveled 1000 km/s, much faster than air pressure waves, allowing for potentially quicker tsunami warnings.
Scientists have found that axisymmetric 'spike waves' can exceed previously thought limits on ocean wave height, leading to significant implications for maritime safety. The new research revealed the fundamental mechanisms behind highly directional and crossing waves becoming much larger than others.
Researchers from Utrecht University and TU Wien develop a method to calculate optimal light waves for precise measurement of invisible objects in complicated environments. This technology has potential applications in microbiology, computer chip production, and nanometer-scale imaging.
Researchers found X-rays continuing to radiate from the collision long after models predicted they would stop. The study suggests possible explanations for the long-lived X-ray emissions, including a new feature of the collision's afterglow or the presence of a remnant neutron star.
Researchers aim to improve weather and climate prediction by modeling atmospheric gravity waves using Loon LLC's internet-connected balloon data. The project will help scientists better understand the impact of these wave phenomena on jet streams, polar vortex, and extreme weather.
Researchers used Loon LLC's data from high-flying balloons to calculate gravity wave motions, finding larger waves in the tropics during summer and smaller waves near the poles during winter. The study's findings help constrain circulation responses to climate change and improve regional weather forecasts.
A University of Colorado Boulder-led team has discovered a critical connection between equatorial winds and atmospheric waves at the South Pole. The study highlights how winds in the deep tropics affect the polar vortex, triggering outbreaks of cold weather patterns in mid latitudes.
The Cassini spacecraft captured high-resolution images of Saturn's Hexagon, revealing a multilayered haze system with particles as small as 1 micron. The team discovered that the hazes are organized by gravity waves and may be responsible for the hexagon's formation.
The InSight lander has detected gravity waves, surface swirling dust devils and the steady rumble of infrasound on Mars. The team also found daily pressure and temperature fluctuations stronger than on Earth, and convective vortices known as dust devils.
Researchers from the University of Helsinki, led by Professor Minna Palmroth, have discovered a new auroral form called 'dunes' through citizen science collaboration. The phenomenon is believed to be caused by waves of oxygen atoms glowing due to solar particles, and provides a novel way to investigate upper atmospheric conditions.
Researchers discovered a connection between changes in internal gravity wave parameters five days before an earthquake, enabling the development of short-term forecast methods. The study's results show that IGWs can be used to identify seismically active regions and make predictions about upcoming seismic events.
The Suomi NPP satellite captured night-time and infrared images of Tropical Storm Nestor on Oct. 18, revealing lightning, overshooting cloud tops into the stratosphere, and gravity waves. Powerful thunderstorms around the storm's center generated these waves in quick bursts.
Hurricane Lorenzo attained Category 5 strength briefly, becoming the strongest hurricane on record in the eastern-most Atlantic Ocean. The Suomi NPP satellite provided infrared data that showed changes in the storm's eye and powerful thunderstorms, and mesospheric gravity waves were also observed.
Researchers at UC Davis have found a new candidate for dark matter, a magnetic monopole particle that could interact with 'dark photons'. This new theory offers a potential way to detect dark matter particles streaming through the universe. However, the predicted phase shift is extremely small, making detection challenging.
Astronomers observed blue supergiants for the first time using data from NASA space telescopes, discovering wave patterns on their surface that reveal properties of these stars. The discoveries confirm two types of waves, providing new prospects for studying massive stars.
A new study reports the basic characteristics and energy propagation processes for internal waves (NIWs) induced by sequential typhoons. The study finds that NIWs excited by large-scale wind stress exhibit distinct features, including frequency shifts due to Doppler effects and variations in vertical phase and group velocities.
A recent NASA long-duration balloon mission captured high-resolution images of noctilucent clouds, revealing processes leading to turbulence. The mission aims to improve weather forecasting models by understanding the causes and effects of atmospheric gravity waves.
Researchers have uncovered tantalizing clues to the origins of persistent gravity waves in Antarctica, suggesting two possible sources: lower-level waves breaking and re-exciting new waves, or polar vortex winds. Studying these waves is crucial for improving climate and weather models.
Researchers from North Carolina State University have observed rapid and dramatic clearings of low cloud cover over the Atlantic Ocean, particularly in the southeast Atlantic. This phenomenon could provide insights into how clouds affect Earth's heating and cooling. The researchers found that atmospheric gravity waves are likely respon...
Researchers have created a new map of medium-scale travelling ionospheric disturbances (MSTIDs) to better understand their impact on radio signal distribution. MSTIDs are huge wave perturbations that can interfere with radio signals, and this study provides valuable insights into their structure and behavior.
Researchers have observed weak gravity signals related to earthquakes and found they are sensitive to the magnitude of quakes. These signals may aid in early identification of major earthquakes.
Scientists have developed a new method to locate the precise time and location that objects fall into our oceans using underwater microphones. The method relies on measuring acoustic gravity waves generated when an object hits the sea surface. Researchers validated their method by locating recent earthquakes in the Indian Ocean.
A NASA-NOAA satellite captured a unique image of Hurricane Irma's eye over the island of Barbuda in the eastern Caribbean Sea. The storm's powerful thunderstorms and visible tropospheric gravity waves were evident in the image.
During the total solar eclipse on August 21, UMass Lowell faculty and students will conduct research on space weather using high-tech instruments. The goal is to better predict the weather and enhance GPS, satellite, and shortwave-radio communications.
Scientists have discovered evidence of a type of seismic wave in the Sun using data from NASA's SOHO. The waves, called g-modes, reveal that the solar core is rotating approximately once every week, nearly four times faster than its surface.
Researchers from an international collaboration have analyzed data from the Venus Express spacecraft to investigate Venus's complex atmosphere. They found that stationary gravity waves at higher altitudes are related to surface elevations, suggesting wind currents caused by topographical obstacles contribute to the planet's superrotation.
Researchers have discovered atmospheric gravity waves radiating from hurricanes, which could be used to monitor the storms' intensity and location from hundreds of miles away. These subtle waves can reveal processes occurring in the eyewall of a hurricane that are obscured by thick clouds, leading to better forecasts.
Researchers have demonstrated a new type of laser using bound states in the continuum, which can be more compact and energy-efficient. This technology has the potential to revolutionize telecommunications and computing applications.
Researchers have created a statistical model to forecast extreme waves, which are large and spontaneous ocean waves that can be deadly. The model uses joint statistics of multiple points in time or space to capture wave heights and turbulent air flows, greatly reducing complexity and obeying the Fokker-Planck equation.
Researchers at MIT have developed a general theory that connects gravity waves and acoustic waves, finding that surface-gravity waves can generate powerful acoustic-gravity waves under certain conditions. This energy exchange could play a role in water transport, carbon dioxide distribution, and sustaining a healthy marine environment.
Researchers used asteroseismology to probe magnetic fields in the cores of red giants, finding them strongly magnetized. The strong fields disrupt gravity waves, causing energy loss and affecting star evolution.
Researchers use asteroseismology to track waves through stars and determine internal properties, finding nearly a million times stronger magnetic fields than typical refrigerator magnets. This technique allows probing of previously hidden regions of stars.
The Deutsche Forschungsgemeinschaft is establishing nine new Research Units to tackle pressing issues in their respective fields. The units will focus on topics such as needs-based distribution, academic learning, photonic networks, gravity waves, and synaptic plasticity.
Researchers investigate supperrotation on Venus and Titan using global atmospheric simulations. They find a global instability coupling equatorial waves, which could predict superrotation occurrence. This discovery helps scientists design spacecraft and landing missions for specific targets.
Researchers at University of Nevada, Reno propose a new method to detect gravitational waves from the far reaches of the universe. The device, which uses optically levitated sensors, has the potential to exceed existing detectors' sensitivity by an order of magnitude.
Researchers describe a new method for invisibility cloaking using ocean floor topography to shield floating objects from waves. By manipulating internal waves, objects can be protected from surface waves, offering potential benefits for offshore structures and fishing.
Researchers suggest that axions, hypothetical particles with low mass, could accumulate around black holes and emit gravity waves. This process could be measured using existing detectors, providing insights into astronomy and potentially revealing new particle types.
Researchers recorded tsunami airglow signature using camera system in Maui, Hawaii, one hour before the event. The observation confirms a theory that tsunamis can produce atmospheric gravity waves detectable by satellite imaging.
A new experiment using an atom interferometer has confirmed Albert Einstein's theory of general relativity by measuring the gravitational redshift with unprecedented precision. The result shows that gravity changes the flow of time, a concept fundamental to the theory, and demonstrates the accuracy of Einstein's predictions.
The QUIET team will deploy a new gravity-wave probe in June to test the existence of cosmic inflation. The probe aims to detect remnants of the universe's earliest moments, when space expanded faster than light.
Recent studies analyze global warming trends, exploring decadal cooling periods and long-term climate change. Scientists also investigate recent solar radiation changes, finding complex mechanisms behind 'global dimming' and 'brightening.' Analysis of the Dust Bowl's atmospheric circulation reveals potential links to Midwest droughts.
Tokuo Yamamoto, a University of Miami marine acoustics expert, won the 2008 Alan Berman Research Publication Award for his work on velocity dispersion and attenuation in New Jersey Shelf sediments. The award recognizes his research on high frequency acoustic waves interacting with silty-sand marine sediments.
Researchers using South Pole Telescope aim to detect extremely weak gravity waves produced by cosmic inflation. The detection could provide conclusive evidence for the theory, ruling out competing ideas for the universe's origin.
A new forecasting method published by UGA scientist could help pilots chart new courses around clear air turbulence, reducing the risk of injury claims. The method uses gravity waves and a single, consistent theory to predict turbulence location.
NJIT physics professor Andrew Gerrard has installed a 1.2-meter diameter telescope atop Jenny Jump Mountain, allowing amateurs to observe the heavens at professional levels. The telescope will also aid researchers in studying gravity waves affecting earth's circulation and climate change.
Researchers will use HIAPER to explore mountain waves and rotors, improving aviation safety and predicting turbulent conditions. The project aims to understand the three-dimensional nature of rotors and their impact on climate and air quality.
Yale researchers will observe, describe, and explain severe atmospheric turbulence over mountains, focusing on 'gravity waves' that impact the stratosphere. The Terrain-induced Rotors Experiment (T-Rex) project aims to measure properties of whirlwinds formed in mountain ranges and monitor gravity wave behavior.
Researchers suggest that high winds over rough terrain can generate acoustic waves that heat the atmosphere at prodigious rates. These waves could account for mysterious 'hotspots' observed above the Andes and Rocky Mountains.
This AGU journal features research on space weather substorms, with a possible explanation for large magnetic fluctuations during the onset of a space weather substorm. Additionally, high frequency sea ice motion may affect Arctic dynamics, while tropical drought regions in global warming and El Nino teleconnections are also explored.