Articles tagged with Atmosphere
Researchers Jeremy Bloxham and Rakesh K. Yadav use a 3D simulation model to understand the formation of Saturn's massive hexagon storm, which has remained relatively unchanged for nearly 40 years. The study suggests that deep thermal convection plays a key role in creating the unique shape and persistence of the storm.
Researchers found that recurrent ice discharges from the Cordilleran ice sheet in the North Pacific contributed to global climate disturbances, including changes in deep ocean circulation and retreat of ice sheets in the North Atlantic. The study challenges theories that these events originated in the North Atlantic.
Researchers found evidence of widespread forest fires during the Cretaceous period, burning up to 40% of global forests, even in wet regions. This discovery sheds light on how Earth's history might behave under future global climate change.
As the atmosphere warms, ocean stability increases, leading to reduced carbon burial and decreased productivity. Cooler water layers not mixing due to stable conditions prevents oxygen and nutrient delivery.
Researchers are advancing decadal predictions by applying a multivariate statistical framework to climate models. They aim to improve understanding of climate variability and predictability.
Researchers measure CO2 concentration in the atmosphere and find no decrease despite estimated reductions of up to eight percent in 2020. Long-term changes are needed to reach Paris Climate Agreement goals, requiring cumulative reductions every year.
An international team of astronomers detected phosphine in Venus' atmosphere, which could be evidence of biological origin, but unknown photochemistry or geochemistry are also possible explanations.
A new version of China's climate system model shows significant improvements in simulating ocean and sea ice trends. The model outperforms previous versions in terms of climate element representation, including long-term trends and climatological patterns.
Researchers found significant correlations between stationary wave strength and tropical cyclone activity, with strong waves modulating TC frequency and altering atmospheric conditions. The study's hemispheric perspective on TC variability offers insights into improving future projections of TC activity in a warming climate.
A new study reveals pulse-like increases in atmospheric carbon dioxide during glacial and early interglacial periods, linked to changes in the AMOC. The results suggest similar jumps could occur in the future if global warming impacts Atlantic Ocean circulation.
Researchers at the University of Bern used a new measurement technology to analyze Antarctic ice cores and found that CO2 concentration rose rapidly during interglacial periods, even when ocean circulation was disturbed. This challenges the assumption of stable climate conditions during previous interglacials.
Scientists used an 'ocean-in-a-lab' to show that air pollution can change the makeup of gases and aerosols released by sea spray, influencing atmospheric composition and weather. The study found that adding pollutants like hydroxyl radicals transformed microbe-produced gases into new compounds.
Researchers have developed a new method to map the magnetic field of the solar corona using near-infrared observations. The technique, presented in a recent study, can provide detailed maps of the coronal magnetic field across the entire observable corona.
A new model developed by researchers can predict tropical cyclones with improved accuracy, up to 10-30 days in advance. The model analyzes nearly a quarter of the Earth's surface and atmosphere, accounting for key factors such as warm sea surface temperatures and wind shears.
Scientists analyzed atmospheric and oceanic factors behind the 2017/18 La Niña event's cooling. Wind stress and subsurface cold water played significant roles in the event's second-year cooling, with differences observed from previous events.
George Mason University's Daniel Tong will receive $83,748 from NOAA to develop an integrated model system predicting air quality and greenhouse gas emissions at a city scale. The three-year project aims to simulate the evolution of criteria air pollutants and greenhouse gases in a changing climate.
A recent research development introduces a pioneering theory of three-pattern decomposition of global atmospheric circulation. This new system improves the accuracy of climate prediction by unifying atmospheric motions in different latitudes. The theory has been praised as an original and innovative achievement with international level.
Anomalous geomagnetic activity detected in South Atlantic Ocean, potentially hindering satellites due to increased solar particles. Volcanic rocks on Saint Helena island reveal variation in magnetic field directions higher than expected at the latitude.
A recent study published in npj Climate and Atmospheric Science reveals remarkable skill in reproducing multi-annual variations of North Atlantic Oscillation (NAO) and atmospheric blocking frequency. This breakthrough suggests that impactful climate anomalies may be predictable with improved dynamical models, filling the gap between lo...
Tong and collaborators are developing a model-ready emission dataset for CAM-CMAQ's wildfire forecasting system, aiming to improve accuracy and mitigate adverse fire effects. The dataset will also incorporate aerosol attenuation of photolysis in smoke plumes.
A veteran NAU planetary scientist collaborates with UAE and US teams to develop Emirates Mars Infrared Spectrometer (EMIRS), providing a unique view of Martian atmosphere. The Emirates Mars Mission 'Hope' orbiter arrives at Mars in February 2021, collecting images and data for two years.
Research using satellite observations and air mass trajectory modeling reveals that aerosols can extend cloud lifetime and brightness in the stratus-to-cumulus transition zone. This can lead to reduced planetary warming by reflecting more solar radiation back into space.
A recent study confirms theories developed by physicists over the last two centuries, showing the Earth's atmosphere vibrates like a bell. The study analyzed atmospheric pressure data for 38 years, revealing dozens of predicted wave modes, matching theory well.
Astronomers at the University of Warwick have discovered a Neptune-sized gas giant with an exposed core, allowing for the first time to peer inside a planet. The core is believed to be 'failed' or stripped of its gaseous atmosphere, offering insights into planet formation and composition.
Researchers have detected a system of super-Earths orbiting the nearby star Gliese 887, a red dwarf with conditions suitable for liquid water and potentially hosting life. The newly discovered planets are large enough to be rocky worlds and could retain their atmospheres due to the star's low activity.
Researchers warn that forests can be vulnerable to climate change, including fire, drought, and insect damage, which can undermine the effectiveness of forest-based natural climate solutions. Scientists must focus on assessing forest climate risks and sharing data with policymakers to inform climate strategies.
Researchers are assessing the quality of a new satellite fire product using aircraft campaign data to support NOAA's next-generation wildfire forecasting system. The goal is to improve model-ready fire emission data for the CAM-CMAQ wildfire forecasting system.
The study found that airborne dust can cool down the hotter dayside but also warm the night side, effectively widening the planet's habitable zone. This process is a negative climate feedback, postponing the loss of water and making the planet more habitable.
New research suggests nitric acid can boost particle growth in cold climates, forming particles even in highly polluted cities. This mechanism also affects the oxidation characteristics of organic compounds, potentially reducing aerosol formation and contributing to climate warming.
A new model predicts the most common type of cloud on hot Jupiters, which should consist of liquid or solid silicate droplets. The study also finds that clouds can block observations of gases beneath them, hindering research on exoplanet formation and life.
The asteroid impact at an estimated 60-degree angle led to the release of massive amounts of sulphur into the atmosphere, blocking sunlight and causing a nuclear winter. This event ultimately contributed to the extinction of dinosaurs and 75% of life on Earth 66 million years ago.
A study analyzing nearly 40 years of hurricane satellite imagery found a global increase in maximum sustained winds, consistent with expectations of how hurricanes respond to a warming world. The research built on previous work identifying trends in hurricane intensification and poleward migrations of hurricanes.
Researchers at Carnegie Mellon University have identified a previously unknown mechanism that enables the rapid growth of atmospheric particles. This discovery could help model climate change and reduce air pollution in cities by explaining how tiny particles form and grow.
A Southwest Research Institute scientist modeled Mars' atmosphere to determine that salty pockets of water on the Red Planet are unlikely to be habitable by Earth-based life. The study found stable brines could form seasonally, but temperatures are too low to support life.
A new study reveals that climate change is causing a significant loss of water from peatlands, which can accelerate global warming by releasing stored carbon into the atmosphere. This can lead to more intense fires and worsen the boreal landscape.
By 2050, the US is expected to face more frequent heat waves, droughts, and floods, posing greater risks to human health and ecosystems. Researchers used high-resolution climate models to calculate population exposure to extreme climate events, finding that over 47 million people are already exposed annually.
Researchers tracked Venus' atmospheric clouds and winds using Akatsuki data to estimate forces sustaining super-rotation. Thermal tides from solar heating near the equator are found to provide required angular momentum
Researchers found that atmospheric tidal waves formed from solar heating on the planet's dayside and cooling on its nightside maintain Venus' super-rotation. The study also reveals a dual circulation system that transports heat across the globe.
A recent special issue of Advances in Atmospheric Sciences presents the latest findings from expanded and ongoing research efforts in Antarctic meteorology and climate. The studies reveal signs of climate change, including strong warming over the Antarctic Peninsula, rapid ice loss, and changes in precipitation patterns.
The University of Helsinki has established a new standard procedure for analyzing fine particles in experimental chambers, enabling researchers to better understand the mechanisms associated with fine particle formation and its impact on global warming. This standard will help simulate past and future atmospheric conditions, providing ...
Eastern China's air pollution has been a major concern, and new research suggests that future aerosol emission reductions could worsen atmospheric diffusion conditions conducive to extreme haze events. The study found that climate effects induced by aerosol reduction play a leading role in the anticyclone change in eastern China.
A new study has measured wind speeds on a brown dwarf using infrared and radio emissions, revealing strong winds of up to 2,400 kilometers per hour. The technique can be adapted to characterize atmospheres of exoplanets with similar rotation rates and periodic variability.
A team of Brazilian researchers collected shallow snow cores and analyzed BC concentrations to study the particle's effect on Antarctic climate. They found very low BC concentrations, sparking questions about BC seasonal variability and geographical sources.
New analysis of data from NASA's Cassini spacecraft reveals that auroral electric currents are likely responsible for heating Saturn's upper atmosphere. The study provides the most complete mapping yet of temperature and density in a gas giant's upper atmosphere, shedding light on how heat circulates in the region.
New research suggests that the Arctic may impact Eurasian extreme weather events as quickly as two to three weeks, highlighting the need for more robust analysis techniques. The study aims to improve forecast accuracy by targeting specific observations and developing simulation experiments.
A new study found that ocean changes in the early Neoproterozoic era limited phytoplankton growth and oxygen release, maintaining an oxidizing atmosphere. The study suggests that phosphorus levels remained 'just sufficient' to support life.
A new framework reconciles model simulations with laboratory and empirical observations, providing a more accurate understanding of black carbon's climate forcing effect. The study finds that black carbon particles are not uniformly coated, resulting in lower absorption rates than models suggest, but still contribute to climate warming.
Researchers at KAUST found that Middle East dust has a positive cooling effect on the land and Red Sea, with the largest radiative cooling effect in the world. This discovery highlights the complex role of dust aerosols in shaping global climate patterns.
A new study reveals that a site in southern Germany's Nordlinger Ries crater may provide insights into Mars' ancient atmosphere. The team used nitrogen isotope ratios to estimate the pH of ancient waters, suggesting high levels of carbon dioxide could have made liquid water possible on the red planet.
A new study suggests that ancient stores of methane in permafrost and beneath Arctic ice have a limited impact on future climate warming. Current activities are the primary source of methane emissions, with natural emissions accounting for nearly 40%.
A study reveals that Mediterranean-like climates are experiencing variable responses to climate warming, with some regions drying faster than global-mean warming. The differences result from distinct regional changes in atmospheric circulation driven by separate fast and slow sea-surface temperature responses to greenhouse gases.
A 784,000-year climate simulation reveals that Southern Ocean sea ice significantly reduces atmospheric carbon dioxide during glacial periods. By limiting surface water exposure and vertical mixing of deep ocean waters, sea ice drives a 40 ppm reduction in atmospheric CO2 levels.
Scientists found that at least 30% of oceanic dimethyl sulfide is transformed into hydroperoxymethyl thioformate (HPMTF), a previously unknown atmospheric compound. This discovery suggests reevaluation of marine sulfur's impact on cloud formation and climate.
Research led by the University of Arizona found that the US East and Gulf Coasts have different responses to storm surges due to ocean and atmospheric circulation interactions. The Gulf Coast, particularly New Orleans, is highly sensitive to tropical cyclone characteristics, leading to elevated storm surge heights.
Researchers found a connection between Arctic sea ice melting and altered Pacific El Niño activity. The study suggests that sea ice melt drives vertical convection in the Arctic Ocean, generating planetary waves that carry heat and momentum to the tropics.
A new study published in Nature Climate Change concludes that future subtropical warming is the main culprit behind accelerated tropical climate change. This phenomenon originates from the interaction of atmospheric and oceanic circulation changes, as well as cloud processes between subtropical and tropical regions.
A new analysis shows the world's oceans were the warmest in 2019 than any other time in recorded human history. The study reveals that the past ten years have been the warmest on record for global ocean temperatures, with significant consequences for marine life and extreme weather events.
Scientists studied Martian atmospheric water vapor using ExoMars Trace Gas Orbiter data, finding seasonal changes were the dominant regulator. The study suggests that warm seasons can lead to increased water loss into space, impacting Mars' continued desiccation.
Researchers at UC Riverside have developed a technique to detect oxygen in exoplanet atmospheres, which may indicate the presence of life. The method uses NASA's James Webb Space Telescope to identify a strong signal produced by oxygen molecules when they collide.
A new study reveals Amazonian forests regrow much slower than previously believed, taking up to a century to fully recover and potentially overestimating their role in combating human-caused climate change.