Articles tagged with Atmospheric Dynamics
Two remote Rossby wave trains converged to strengthen pressure gradients over northern China, driving the extreme wind event. The team found that these large-scale patterns were boosted by anomalous atmospheric circulation and enhanced winds in northern China.
Damiano Baccarella received a $750,000 NASA award to study the extreme environments encountered by hypersonic spacecraft during atmospheric re-entry. He aims to develop novel strategies for experimental characterization of chemical and vibrational non-equilibrium in high-enthalpy hypersonic wind tunnels.
Researchers analyzed the 2025 Texas Hill Country floods, which killed at least 135 people, including 28 at Camp Mystic. Experimental models showed they could have predicted extreme flows with greater lead time.
A new study finds that a slowing Atlantic Ocean current will strengthen powerful storms in California while reducing snowfall over Greenland. The Atlantic Meridional Overturning Circulation's weakening is projected to increase atmospheric moisture and high-altitude winds, creating more destructive atmospheric rivers.
Researchers found that climate variability in the North Atlantic-European region and tropical Indo-Pacific regions interact to intensify Japanese winters. This interaction amplifies jet stream disturbances, resulting in colder and more severe conditions.
The study reveals a striking future intensification of the upper-level Hadley circulation under different climate scenarios, with the Southern Hemisphere showing higher sensitivity to global warming.
Researchers developed a physics-based framework to predict power fluctuations from renewables, enabling grid operators to mitigate surges and blackouts. The model correlates atmospheric turbulence with electricity output, allowing for accurate risk assessments of existing turbines and farms.
New research from the American Meteorological Society explores AI forecasting limits, the impact of climate change on hurricane trends, and simplifies the heat index. The studies find that machine learning can outperform numerical physics-based models in certain conditions, but not universally.
Dr. Seth Zippel has made significant contributions to the understanding of air-sea interaction, surface gravity waves, and boundary-layer turbulence through innovative field experiments and novel observational techniques. He is recognized for his impact on ocean mixing, weather and climate prediction, and offshore wind energy assessments.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences quantify the role of climate change in wildfires and air quality, finding that 60-82% of total burned area in western US forests is directly attributable to warming temperatures and drier conditions caused by climate change.
A study published in Science Advances found that unusually large particles of wildfire smoke had a significant cooling effect on the region they were observed in, increasing outgoing radiation by 30-36% compared to smaller smoke particles. This effect has not been included in current climate models.
Researchers found significant SF6 emissions in Heilbronn region, amounting to approximately 30 tons per year, and exceeding previous estimates. The study aims to validate bottom-up assessments of emissions by complementing top-down emission estimates.
A new study reveals that surface dynamics and aerosol processes were the key drivers behind the extraordinary 2010 heatwave in western Russia. The researchers used a model-free approach to quantify the contributions of individual radiative and dynamical processes, finding surface dynamics to be the primary contributor.
A new study shows that reducing air pollution has decreased the brightness of marine clouds, leading to accelerated warming. Scientists attribute 70% of this change to aerosols, and researchers are exploring ways to make clouds shinier without polluting the air.
UT Dallas researchers are developing a material to protect spacecraft from atmospheric drag and erosion, which can damage vehicles in space. The new coating has shown promising results, withstanding atomic oxygen conditions better than those in space.
Researchers found compound drought-heatwave events rippling and persisting through the night, exacerbating heat-related health risks. Soil dryness plays a key role in triggering these extreme events, which can affect crops, wildfires, and daily life.
Researchers from Tel Aviv University predict that detecting radio waves from the cosmic dark ages can help resolve the nature of dark matter. The study uses computer simulations to show that dense clumps of dark matter formed throughout the Universe, pulling in hydrogen gas and causing it to emit intense radio waves.
New research from Purdue University reveals how moisture influences atmospheric blocking, a phenomenon that often drives heat waves, droughts, cold outbreaks and floods. The study introduces a new mechanism showing that moisture-induced diabatic heating strengthens ridge blocks but weakens dipole blocks.
Researchers have developed a novel way to reach the unexplored mesosphere using lightweight flying structures that can float using sunlight. The devices, which were built at Harvard and other institutions, levitated in low-pressure conditions and demonstrated potential for climate sensing and exploration.
Researchers at ETH Zurich found that mineral dust particles can trigger freezing of cloud droplets, particularly important in northern regions where clouds form below freezing temperatures. This process affects sunlight reflection and precipitation generation, with major implications for climate models.
Researchers detected atmospheric methane and silicon monoxide on WASP-121b, suggesting it accumulated most of its gas in a cold region before becoming an ultra-hot giant planet. The team proposes that strong vertical winds on the nightside replenish methane gas to maintain its high abundance.
Research finds that strengthened westerly winds enhance clockwise oceanic circulations, transporting warm seawater and causing accelerated ice sheet melting in East Antarctica. This study's findings improve future sea level rise projections.
Scientists have identified a new reason for UK winter storm clusters, pointing to stronger winds in the Arctic stratosphere. This research reveals that an intense swirling vortex of winds miles above the Arctic can make severe winter storms more likely, and may offer early warnings for forecasters up to a month before they happen.
A new study reveals regional differences in Hadley circulation intensity trends, with the Indian Ocean region playing a key role in the discrepancy. The research highlights the importance of accurately simulating diabatic heating, zonal friction, and greenhouse gas external forcing to improve climate model accuracy.
The NRL-developed Narrow Field Imager is a compact coronagraph that will image the transition of the Sun's atmosphere to the solar wind, gaining insights into space plasma environments. The PUNCH mission aims to improve prediction and mitigation of space weather events like coronal mass ejections.
A study by MIT researchers found that climate change can cause the thermosphere to shrink, reducing atmospheric drag and allowing space junk to remain in orbit for decades. This could lead to increased collisions and debris, threatening the sustainability of satellite operations.
A new study published in Nature Communications Earth and Environment finds that Arctic cyclones may contribute to the underpredicted decline of sea ice extent. The research suggests two theories: turbulent seas breaking up larger ice floes and upwelling increasing temperatures that help melt younger, thinner ice.
Researchers found that tropical-extratropical interactions induce the end of the rainy (Baiu) season in northern Japan and the Kanto region by enhancing convective activity over the northeast Philippines. The high-potential-vorticity airmass intrusion from mid-latitudes plays a crucial role in this process.
A research team led by Dr Sophie Warken analyzed dripstones from the Cloşani Cave in Romania to understand precipitation variability over a period of approximately 20,000 years. The findings show that dynamic processes like the North Atlantic jet stream influence regional changes in precipitation.
Hubble's OPAL program has observed the four giant outer planets since 2018, providing long-term baseline data on their atmospheric changes. The observations have led to remarkable discoveries, including the measurement of Jupiter's wind speeds and Saturn's ring system colors.
Researchers have discovered unusual, Earth-size magnetically driven vortices generating dense, hydrocarbon haze at Jupiter's poles. The dark ovals hint at strong interactions between the planet's magnetic field and atmosphere.
Scientists will present new research on bio-inspired floating offshore wind farms, harbor seals' whisker sensing abilities, and Manu jumping. The conference features over 300 sessions and nearly 2,800 presentations.
The PICCOLO project aims to improve understanding of clouds and convective storms in the tropics, with the ORCESTRA campaign utilizing sea-borne and air-borne teams to collect data. Researchers collected detailed information on precipitation, cloud microphysics, and convective dynamics.
George Mason University's Petrus van Oevelen received funding from the World Meteorological Organization (WMO) for WCRP support to the International Global Energy and Water Exchanges (IGPO) 2024 meetings. The $33,323 grant will be used until late December 2024.
A team of researchers found that air turbulence in the thermosphere exhibits the same physical laws as wind in the lower atmosphere, leading to a new unified principle for Earth's environmental systems. This discovery can potentially improve future forecasting of both Earth and space weather.
Researchers have introduced iso-propagation vortices, offering a solution to increasing information processing capacity while overcoming traditional vortex beam limitations. IPVs exhibit OAM-independent propagation, allowing for consistent beam size during free-space propagation.
A new study led by Dr. Assaf Hochman uncovers ozone's impact on atmospheric stability and temperature distribution on Proxima Centauri b, a habitable exoplanet tantalizingly close to Earth's solar system. The research highlights the importance of considering interactive ozone in understanding Earth-like exoplanets.
A recent study published in npj Climate and Atmospheric Science reveals that changes in subtropical and midlatitude eddy activity control the variation of the Hadley cell edge latitude. The researchers analyzed 41 years of data and found associations with El Niño, La Niña, and the Arctic oscillation.
Researchers at Max Planck Institute for Dynamics and Self-Organization developed a precision apparatus to observe non-spherical particles settling in air. They found that particles tend to oscillate as they settle, which could impact collision rates, travel distance, and solar radiation interaction.
A new study reveals that microplastic fibers settle substantially slower than spherical particles in the atmosphere, allowing them to reach remote regions such as Arctic glaciers. The research suggests that these fibers could even reach the stratosphere, with potential implications for cloud processes and ozone depletion.
A GEOMAR study found that low North Atlantic sea surface temperatures are responsible for heat events on land. The researchers discovered a link between cold ocean temperatures and European heat waves, which contributes to the formation of high pressure systems and clear skies.
Researchers at Hebrew University of Jerusalem discover that pollutants trigger significant changes in large-scale weather patterns, leading to enhanced radiative forcing. Aerosols stop rain in some areas, causing moisture to move to regions with big clouds, which release heat and strengthen winds.
Researchers developed a precise historical reconstruction of the Red Sea circulation using fine-grained regional data. The new analysis reveals new characteristics of current circulation, temperature, salinity, and oceanic behavior, improving decision-making for megadevelopments like those in Saudi Arabia.
A team of researchers has determined that microplastic particles are present in the marine atmosphere, even in remote parts of the world. The study found that different types of plastics, including polyester and polyethylene terephthalate, were detected in air samples collected from various sites along the Norwegian coast.
New research found that plant water use efficiency has stalled since 2001 due to climate change, contradicting earlier hopes it would help improve water consumption. The study's findings suggest that rising temperatures and atmospheric CO2 may be undermining nature-based methods to achieve carbon neutrality.
Researchers clarify how microorganisms spread globally through atmospheric dispersal, highlighting mechanisms and key areas of concern. The study emphasizes the importance of addressing this phenomenon to minimize disease spread and preserve ecosystem health.
A new study from Oregon State University found that massive iceberg discharges during the last ice age triggered rapid warming in Antarctica but had no effect on temperatures in Greenland. This discovery challenges current understanding of global climate dynamics and raises more questions than answers.
Researchers found that exceptional weather conditions over several years are turning European forests brown. Characteristic weather patterns, such as prolonged dry periods and high temperatures, precede these events, with a legacy effect contributing to future low-forest greenness.
Researchers from Pusan National University studied compound extreme weather events in northern East Asia and found that a lack of soil moisture led to increased evaporative stress, amplifying heatwaves and triggering compound droughts and heatwaves. Understanding these dynamics is crucial for societal safety.
A recent geological study has confirmed that major changes in the global carbon cycle occurred on land during the early Cretaceous Period, matching those recorded in marine sedimentary rocks. The research, led by Matt Joeckel of the University of Nebraska-Lincoln, used chemical and radioactivity-based analyses to find evidence of two d...
A study found that a northward position of North Pacific sea surface temperature anomalies weakens the Arctic stratospheric polar vortex. This weakening can lead to Eurasian cooling and negative surface temperature anomalies.
The MEDA instrument aboard the Perseverance rover has provided high-precision meteorological measurements of Mars' atmosphere, revealing seasonal and daily cycles as well as dynamic phenomena like dust devils. The analysis sheds light on the Martian climate and its potential for supporting life.
Researchers link extreme thunderstorms to Amazon tree deaths, predicting 43% increase in large windthrow events by the end of the century. The tropics will see a 50% increase in areas susceptible to extreme storms triggering windthrows.
A UMaine-led study shows that mountain glaciers are linked to shifting westerlies and likely to accelerate due to global warming. The researchers found that fluctuations in glacial snowlines reflected temperature changes over large regions of the atmosphere.
A recent VLA and ALMA study investigated Jupiter's atmosphere and Io's volcanic activity, shedding light on the giant planet's complex dynamics. The research revealed the vertical structure of Jupiter's atmosphere and found high-temperature compounds, including NaCl and KCl, in Io's atmosphere, suggesting differences in subsurface magm...
Researchers analyzed GPS tracks of 46 wandering albatrosses to understand their airspeed increases with wind speed up to 20 m/s. The birds limit their airspeed by adjusting turn angles to maintain wing strength, while exploiting updrafts over waves in low winds.
Researchers located four new craters created by impacts on Mars' surface using data from a seismometer and visuals acquired from the Mars Reconnaissance Orbiter. This is the first time that researchers have captured the dynamics of an impact on Mars.
Researchers have confirmed the existence of Pekeris waves, a type of atmospheric wave theorized in 1937 but never proven to occur naturally. The waves were detected following the 2022 Tonga volcanic eruption using state-of-the-art observational data and computer simulations.
A FAU Harbor Branch study demonstrates hydrology impacts through high-resolution simulation model. Increased freshwater discharge contributes to intensified shelf water mixing that favors surface intrusion of Loop Current waters.
Researchers reveal the likely composition of Charon's dynamic methane atmosphere and propose a possible source for its red polar zone. The team's novel experiments and atmospheric modeling suggest that ultraviolet light breaking down methane molecules is key to understanding the moon's unique albedo.