Articles tagged with Stratospheric Aerosols
Researchers discovered that plankton emissions form acidic vapors that trigger aerosol particle growth and cloud formation over pristine ocean regions. This finding improves climate models by accounting for previously overlooked gas methanesulfonic acid.
New research warns that solar radiation management through stratospheric aerosol injection (SAI) poses unforeseen challenges due to particle variability, geopolitical limitations, and economic strain. The study highlights the need for centralized coordination and careful consideration of alternative materials.
A new study suggests that adding particles to the atmosphere at a lower altitude near the polar regions can effectively cool the planet. Commercial jets like Boeing 777F could reach this altitude.
Climate change drives large increases in electricity demand and costs in Texas due to extreme temperatures. Meanwhile, atmospheric rivers become more frequent, larger, and moister globally. Diagnostic studies also predict malaria outbreaks with five-month lead time using sea-surface temperature anomalies.
Researchers have proposed guidelines for evaluating proposals to inject sulfur dioxide into the stratosphere, focusing on technical feasibility and cooling potential. The guidelines aim to identify the most feasible and legitimate scenarios, considering both risks and benefits.
A new study published by Texas A&M University researchers found that the Hunga Tonga volcano eruption did not contribute to global warming as initially thought. Instead, the eruption resulted in more energy leaving the climate system than entering it, leading to a slight cooling effect.
Researchers found that wildfire-induced aerosols can lead to both ozone depletion and increase at different atmospheric layers, with the middle stratosphere experiencing an increase in ozone concentrations. This complex interplay buffers approximately 40% of ozone depletion observed in the lower stratosphere.
A new study finds that emergency atmospheric geoengineering would not be able to reverse changes to ocean currents, even with stratospheric aerosol injection. Gradual injections can maintain current temperatures and circulation patterns, but abrupt injections fail to restore critical ocean circulation patterns.
Researchers found that injecting aerosols into the stratosphere can reduce ice sheet loss by up to 37.6 mm sea-level rise, slowing global warming's effects. However, geoengineering addresses only symptoms, not root causes, and may delay necessary changes.
The study found that the eruption changed the chemistry and dynamics of the stratosphere, leading to unprecedented losses in the ozone layer. The injection of water vapor and sulfur dioxide increased sulfate aerosols, which drove changes in temperature and circulation, resulting in decreased ozone levels in the Southern Hemisphere.
A study led by Indiana University researchers explores the potential of climate engineering to slow Antarctic ice loss through stratospheric aerosol injection. The approach could buy time to address climate change and avoid catastrophic sea-level rise.
Researchers at Purdue University detect unprecedented levels of alloy aerosols in the atmosphere, likely from spacecraft and satellites. The team found that nearly 10% of large sulfuric acid particles contained aluminum and other spacecraft metals.
Researchers found that hydrothermal vents were active at shallow depths, releasing larger quantities of methane and carbon dioxide into the atmosphere. This discovery has significant implications for understanding past climate warming events.
An international team has detected aerosols from the Hunga Tonga eruption in the Northern Hemisphere stratospheric westerlies, aiding simulation of volcanic plume processes. This discovery provides key insights into physical properties and evolutionary process of volcanic aerosols in the stratosphere.
A study published in Scientific Reports found that Australian bushfires contributed to the highest recorded temperature in the lower stratosphere since the early 1990s. The smoke aerosols emitted by the fires led to a significant increase in stratospheric temperatures, with a modelled temperature spike of around 0.65 degrees Celsius.
Researchers led by Cornell University are evaluating the potential of making the stratosphere 'brighter' to cool the Earth. They use geoengineering simulations to assess the impact of injecting sulfate aerosols, a known pollutant, on climate change mitigation strategies.
A fresh analysis suggests that the global cooling effect of the Hunga Tonga-Hunga Ha'apai volcano eruption will be smaller than expected. However, the researchers warn that a one-time-only event may not be sufficient to overwhelm the longer-term global warming tendency.
A team led by Doug MacMartin will model the effects of introducing reflective aerosols into the stratosphere to reduce Earth's temperature and limit climate change impact. The research aims to better understand the benefits and risks of this approach, with the goal of informing society's decisions.
A new study by UCL and Harvard researchers found that halving warming by adding aerosols to the stratosphere could moderate important climate hazards in almost all regions, with only a small fraction experiencing increased climate change. The approach should be considered as a complementary measure to emissions cuts.
The Manaro Voui volcano in Vanuatu released the largest amount of sulfur dioxide in 2018, with 400k tons during its most active phase in July. The eruption had devastating effects, including acid rain and destruction of homes.
Researchers found that measuring the brightness of light alone is not enough to infer stratospheric aerosols, highlighting the need for an instrument with precise polarization measurements. A specialized Earth-orbiting instrument is necessary to obtain comprehensive information on aerosol properties and distribution.
A new study published in PNAS outlines a mission-driven approach to understanding the impacts of geoengineering and informs policy. The research focuses on releasing sulfate aerosols into the stratosphere, mimicking natural volcanic eruptions.
Researchers emphasize the need for prioritized uncertainty identification in aerosol geoengineering to address climate change. The article suggests a model-based approach with potential small-scale field experimentation once global consensus is achieved.
A hypothetical 'solar geoengineering' project aiming to halve anthropogenic radiative forcing by injecting sulphates into the lower stratosphere is technically possible, but unreasonably costly with current technology. The estimated development costs for an airframe and engine modifications are under $2 billion.
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 recent study reveals that the Asian summer monsoon significantly contributes to aerosol formation in the Northern Hemisphere's lower stratosphere, with a 15% annual contribution. The anticyclonic Asian monsoon serves as an efficient smokestack venting aerosols to the upper troposphere and lower stratosphere.
A new study from the University of Eastern Finland shows that increasing atmospheric aerosol concentration can significantly slow down and even temporarily stop global warming. Aerosol particles in the stratosphere prove extremely efficient in cooling down the climate, while those in the troposphere impact climate through cloud formation.
Researchers discovered early observations of a 19th-century volcanic eruption, dated to within a fortnight of December 4, 1808. The 'Unknown' eruption occurred before the famous 1815 Tambora volcano, which had significant global impacts on climate and inspired literary works like 'Darkness.'
A new CU-Boulder study suggests that volcanic aerosols, rather than industrial pollution, have counteracted as much as 25% of human-caused global warming since 2000. The research, led by Ryan Neely, used sophisticated computer models to separate coal-burning emissions from Asia from volcanic contributions worldwide.
A team of researchers led by the University of Saskatchewan discovered that small volcanic eruptions can inject aerosols into the stratosphere, cooling the Earth's surface. The study used data from the Canadian Space Agency's OSIRIS instrument to analyze the effects of a 2011 eruption in Eritrea.
The SAGE II instrument has provided 20 years of high-quality ozone measurements, enabling scientists to monitor trends and changes in the stratosphere. Its data have also helped study the impact of volcanic aerosols on temperatures and the effects of human activities on the Earth's radiation balance.
Researchers found that tropical biomass burning is causing increased humidity in the stratosphere, contributing to milder winters in North America and Europe. The study suggests that higher humidity helps catalyze the destruction of the ozone layer.