Researchers identified how ozone 'chokes up' plants by directly affecting guard cells, inhibiting stomatal opening and reducing photosynthesis. This knowledge may lead to breeding or genetically engineering less ozone-sensitive plant varieties to improve productivity in regions with high ozone exposure.
A team of CU-Boulder researchers is conducting the largest field campaign ever to assess ozone concentrations and chemical changes in the Arctic stratosphere. They will use various instruments, including satellites, aircraft, balloons, and ground-based instruments, to study the effects of climate change on ozone depletion.
Ship emissions of nitrogen oxides can increase ozone concentrations by twofold and hydroxyl radical levels fivefold, resulting in a cooling effect on the atmosphere. This has significant implications for future international policy decisions regarding atmospheric change.
NASA scientists find that jet aircraft add a few tens of parts per trillion of nitrogen oxides to the atmosphere, increasing ozone levels. However, the impact is too small to detect, but as air traffic increases, understanding these effects becomes crucial for global climate research.
Researchers have found detectable levels of tributyltin in Gulf oysters, which can be toxic to crustaceans. Additionally, the Mississippi River has shown improvement in water quality, with a decrease in volatile organic compounds detected since 20 years ago.
Researchers analyzed polar snowpack and found major ozone-depleting gases were not present in the atmosphere in the late 19th and early 20th centuries. Human emissions can account entirely for their presence in the atmosphere.
Researchers at NASA and the University of Alaska have discovered mysterious bursts of colored light in thunderstorms, known as sprites. These brief, fleeting phenomena contain a great deal of energy, which may be sufficient to drive novel chemical reactions, potentially impacting the Earth's protective ozone layer.
A USGS study published in Atmospheric Environment reveals that air in Washington's Mount Rainier National Park contains higher concentrations of ozone than nearby urban areas. This poses a threat to park visitors and the beautiful forests, wetlands, and alpine meadows within the park.
Researchers at the University of Toronto found a strong correlation between high weekend ozone levels and one degree Celsius higher temperatures. This challenges the assumption that ozone has a minor impact on greenhouse warming compared to carbon dioxide.
Scientists warn that Arctic climate change could counteract ozone layer recovery efforts. Particle sedimentation processes in the stratosphere may remove protective gases, hindering the healing of the ozone layer over the northern polar region.
A new NASA study reveals Atlanta's urban heat island effect, with temperatures 10 degrees higher than surrounding areas, worsened by human land use changes. The increased heat intensifies smog levels and creates thunderstorms, which can also have beneficial effects in cleaning the atmosphere.
A new study by Purdue University researchers reveals that snowpacks not only absorb chemicals but also produce them in the Arctic atmosphere. The findings challenge previous assumptions about how atmospheric gases are processed and may require a re-evaluation of data from ice core studies.
Scientists have found that unusually extensive stratospheric clouds over the South Pole contributed to the near-record-size ozone hole in Antarctica. POAM III measurements provide valuable insights into how Earth's ozone layer responds to global temperature changes and decreasing atmospheric chlorine levels.
Researchers at Max Planck Institute find collisions between light and heavy atoms favor ozone formation, advancing understanding of large isotope effect in heavy ozone. The discovery refutes molecular symmetry theories and highlights the role of specific reaction channels in ozone molecule production.
A record-breaking Arctic polar vortex in 1996-1997 led to significant ozone depletion, comparable to the Antarctic's early 1980s levels. The study revealed that chemical interactions between nitric oxide and nitrogen dioxide chemistry played a crucial role in the depletion.
A recent USGS study suggests that rivers, particularly the South Platte River in Colorado and Nebraska, are emitting high levels of nitrous oxide (N2O), a catalyst for ozone depletion. The study's findings indicate that N2O emissions from these rivers could be a major human-made source of N2O to the atmosphere.
The research proposes that cosmic ray jets can cause lethal amounts of muons, destroying the ozone layer and creating new species through rapid mutations. The theory explains key characteristics of massive extinctions and suggests ways to gather evidence for past catastrophes.
Researchers have demonstrated an instance of a thin ion layer being pushed downward to create a neutral sodium layer. Contrary to predictions, the formation of this layer was not significantly affected by intense auroral ionization, revealing new insights into the physics and chemistry of the upper atmosphere.
A new study by Columbia University and NASA finds that the Arctic ozone hole is projected to double in size by 2020, leading to increased skin cancer cases globally. The research models show that greenhouse gases are cooling the stratosphere, causing more ozone depletion.
Researchers used low-energy helium atom scattering to study the topmost layer of ice, finding that water molecules vibrate strongly, causing a coherent diffraction pattern to be elusive. The results explain why ice is slippery, adheres to other ice surfaces, and traps molecules in the stratosphere, leading to ozone depletion.
Biomass burning emissions from Africa and Australia travel long distances to reach remote islands in the South Pacific, contaminating the air with harmful tropospheric ozone levels. This phenomenon poses a significant atmospheric problem for the 21st century, affecting breathing and plant growth.
A Yale University study confirms that UV-B radiation from the sun causes high rates of mortality and deformity in certain frog and amphibian species. Shielded embryos had significantly lower deformities and mortality rates compared to unshielded ones.
The Student Nitric Oxide Explorer (SNOE) satellite, designed and built by a team of University of Colorado at Boulder students and faculty, is set for launch on Feb. 4. The mission aims to measure nitric oxide in the upper atmosphere affecting Earth's ozone layer, x-rays from the sun, and ultraviolet light from Earth's aurora.
A two-year study found that moderate air pollution can decrease lung function in adult hikers, even at relatively low ozone concentrations. Hikers with a history of asthma or wheezing experienced more pronounced declines.
Research by Stanford University finds that L.A. smog's filtering effect reduces both UV radiation and ozone levels, benefiting skin cancer prevention and respiratory health. The study identifies specific chemical compounds in smog as responsible for this phenomenon.
A new study reveals that Asian industrial smog is affecting the US West Coast, with 10% of ozone and pollutants coming from East Asia. The University of Washington's research station detected higher levels of pollutants such as nitrogen oxide, carbon monoxide, and ozone, which are likely to be lower in Asia just 30 years ago.
Researchers found that some chemicals being phased out for ozone protection have offsetting benefits, such as reducing greenhouse gas emissions. The study suggests that environmental policies should consider both ozone depletion and global warming together.
Environmental scientists have developed an internet-based chat room to analyze ozone levels, enabling policymakers to make informed decisions. The site provides real-time data and interactive tools, helping researchers better understand the regional nature of ozone transport.
A double-blind study found that vitamin E and C supplements reduced sensitivity to ozone exposure and improved pulmonary function in asthmatic volunteers. The study suggests antioxidant vitamins may benefit others exposed to chronic oxidative stress, such as smokers or industrial workers.
A new study shows that nearly half of rural eastern US sites would not meet the new ozone standard, posing health risks to residents. The researchers argue that a regional approach is needed to address rural air pollution, requiring cooperation among states and communities.
A new study by Cornell University researchers reveals that plants require vitamin C to withstand environmental stresses, such as high ozone levels and ultraviolet radiation. This finding has significant implications for improving crop foods with low vitamin C content, which can help address nutritional deficiencies in humans.
The ozone laundry system uses highly reactive oxygen to clean clothes more quickly and thoroughly with less energy, water, and chemicals. This technology reduces labor, chemical costs by up to 60%, and hot water costs by over 80%, extending linen life.
A multidisciplinary team is building an experimental facility to test the effects of combined ozone and carbon dioxide on forest stands. The project aims to understand how trees will respond to increased atmospheric carbon dioxide in conjunction with other pollutants, such as tropospheric ozone.
Researchers at Resources for the Future (RFF) argue that tighter ozone standards won't resolve urban smog problems due to local conditions and economic competition. The authors suggest targeting individuals' driving habits and activities as an alternative to mandated regulation.
A multiyear project called EXPRESSO aims to explore how vegetation and fires interact with the atmosphere in tropical regions. The study will help define the degree of influence central Africa has on global chemistry cycles.
The Central Park Wildlife Center will introduce a state-of-the-art electric-based water system using ozone to purify its aquatic exhibits. The ozone system destroys parasites, viruses, and bacteria, leaving cleaner water for the animals and better visibility for visitors.
Researchers at UC Santa Cruz found seismic evidence suggesting a partially molten layer in the lower mantle, which could fundamentally change our understanding of the core-mantle boundary. The suspected layer, between 5-40 kilometers thick, may conduct electricity more readily than solid rock and influence the planet's magnetic field.
A new system using ozone has been successfully tested at a turkey processing plant in Arkansas, allowing for the recycling of at least 80% of chill water. The process saves energy and reduces costs by minimizing the need for cooling and pretreatment.
A University of Colorado research team is testing the skies over northern Peru with a large balloon and kite to measure greenhouse gas emissions in the Amazon rainforest. The team will track levels of carbon dioxide, methane, and ozone, as well as hydrocarbons emitted from vegetation.
Researchers investigate air exchange between tropical and mid-latitude stratosphere regions, shedding light on ozone layer thinning. The study's findings improve computer model representation of ozone depletion, predicting potential losses due to supersonic aircraft emissions.