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The rapidly growing space industry may have a greater climate effect than the aviation industry and undo repair to the protective ozone layer if left unregulated, according to a new study led by UCL and published in the journal Earth’s Future as an open-access paper. Effect of rocket launch and re-entry emissions on global climate forcing.
The study will appear next month in the peer-reviewed journal Climatic Change Letters. Relying more on natural gas would reduce emissions of carbon dioxide, but it would do little to help solve the climate problem. The study underscores the complex and sometimes conflicting ways in which fossil fuel burning affects Earth’s climate.
A team of researchers from the University of California, Berkeley; University of North Carolina, Chapel Hill; and University of Miami has analyzed the implications of California’s Clean Vehicle Rebate Project (CVRP) for emissions of greenhouse gases and criteria air pollutants, both in aggregate and in their distribution.
In early 2013, the Chinese government declared a war on air pollution and began instituting stringent policies to regulate the emissions of PM 2.5. Paulson School of Engineering and Applied Sciences (SEAS) and the Nanjing University of Information Science & Technology (NUIST), found that while PM 2.5 Ke Li, Daniel J.
The study, set in Singapore, suggests that better air quality will bring about climate co-benefits in reducing electricity generation via lower household demand, and thus mitigating carbon emissions. This is important for policymakers when forecasting and influencing future emissions paths in the context of climate change.
The Asian monsoon circulation provides an effective pathway for pollution from Asia, India, and Indonesia to enter the global stratosphere, according to a new international study led by scientists at the National Center for Atmospheric Research (NCAR) in Boulder, Colo. NCAR scientist William Randel, the lead author.
Jacobson, professor of civil and environmental engineering at Stanford University, suggests that carbon capture technologies are inefficient and increase air pollution. However, this research finds that it reduces only a small fraction of carbon emissions, and it usually increases air pollution. A study by Mark Z.
The research, published in a recent issue of Nature Geoscience , provides evidence of how aerosols—soot, dust and other small particles in the atmosphere—can affect weather and climate. Daniel Rosenfeld of The Hebrew University of Jerusalem. In polluted air, more and smaller drops are formed. —Prof.
In an open-access report in the journal Environmental Pollution , researchers from UCLA and the University of Chicago estimate that California’s wildfire carbon dioxide equivalent (CO 2 e) emissions from 2020 (~127 mmt CO 2 e ) are approximately two times higher than California’s total greenhouse gas (GHG) emission reductions since 2003.
Pollution warms the atmosphere through summer thunderstorm clouds, according to a computational study by a team of researchers from Pacific Northwest National Laboratory (PNNL), Hebrew University in Jerusalem and the University of Maryland published in Geophysical Research Letters. —Fan et al. —Jiwen Fan.
A new study has found that pollutant particles carried by these flows prefer to accumulate in specific regions of the urban environment and even form coherent structures, rather than scattering randomly. —Wenbo Tang of Arizona State University, lead author.
the distribution of black carbon in the atmosphere and determine its role in the climate system. Black carbon (BC) is the second largest man-made contributor to global warming and its influence on climate has been greatly underestimated, according to the first quantitative and comprehensive analysis of this pollutant’sclimate impact.
Illustration of projected ozone changes in the South Coast region due to climate change in 2050. In a new report released by the California Air Resources Board, scientists from the University of California at Davis and Berkeley estimate that rising temperatures from climate change will increase ozone levels in California’s major air basins.
A recent study by an international team calculated that shipping causes a net cooling of climate across all parametrizations of the indirect aerosol effect (IAE) and scenarios throughout the period 1900?2050. Shipping-induced global temperature change in 2050 using different parameterizations of Indirect Aerosol Effect (IAE).
Methane and black carbon (soot) are the second- and third-most powerful climate-warming agents after carbon dioxide. They also contribute to air pollution that harms the health of billions of people worldwide and reduces agricultural yields. Lead author Drew T. Resources. Shindell, N. Borgford-Parnell, M. Haines, J.C.I. Leonard, V.
A study by a team from the University of British Columbia and Metro Vancouver suggests that optimized operational control strategies for transit bus fleets ultimately offer transit agencies a way to maximize the benefits of their capital investments in new, cleaner technologies. the contact of pollutants and people in space and time).
When airborne particles (green) form before PAHs adhere, both the pollutants and particles dissipate quickly, as shown in the top row. But when the particles form in the presence of pollutants, which is what likely happens in nature, the longer-lasting particles enable the long-range transport of the pollutants (bottom).
However, while greenhouse gases cause warming by trapping heat in the atmosphere, some aerosols can have a cooling effect on the climate because the aerosol particles cause more of the sun’s light to be reflected away from the planet. In many cases, the strongest climate effects of aerosols are felt far from where the aerosols are emitted.
Researchers from London South Bank University (LSBU), School of the Built Environment and Architecture, are investigating the use of metal hydrides to absorb, release and store hydrogen for fuel cell buses. But concerns have been raised about the size, cost and safety of hydrogen storage in buses.
A climate-neutral alternative to petroleum-based fuels, they also offer the potential for significantly reduced overall emissions, allowing Tenneco’s Clean Air experts to better manage any remaining pollutants through the aftertreatment process. We are excited to be an active part in the development of this type of technology.
The preferred fuel path(s) will depend to a great extent on their climate and environmental performance, which is of national concern. It also assesses the strengths and weaknesses of EVs and CNGVs from a perspective of climate change and environmental impact. Click to enlarge. Credit: ACS, Huo et al. Click to enlarge.
A two-year study led by researchers at the University of Toronto has found large trucks to be the greatest contributors to black carbon emissions close to major roadways. The study is published in the ACS journal Environmental Science & Technology. Jonathan M. Wang, Cheol-Heon Jeong, Nathan Hilker, Kerolyn K. Shairsingh, Robert M. 8b01914.
The finding could further complicate attempts to model climate change. The team showed that the effect of aerosols on the climate since industrialisation depends strongly on what the atmosphere was like before pollution, when aerosols were produced only from natural emissions. —Carslaw et al. —Professor Carslaw.
Black carbon (BC) from incomplete biomass and fossil fuel combustion is the most strongly light-absorbing component of particulate matter (PM) air pollution and a major climate-forcing emission. Air pollution mitigation efforts focusing on reducing combustion pollution are likely to have major benefits for climate and human health.
Led by the tiny Pacific island of the Federated States of Micronesia, a growing group of low-lying islands and other vulnerable countries are calling for fast action on the approximately 50% of global warming that is caused by pollutants other than carbon dioxide (CO 2 ). The next round of UN climate negotiations begins in Cancun today.
A new study by led by Nadine Unger at NASA’s Goddard Institute for Space Studies (GISS) that analyzes the net climate impacts of emissions from economic sectors rather than by individual chemical species has found that on-road transportatation is and will be the greatest net contributor to atmospheric warming now and in the near term.
A new study led by Tokyo Institute of Technology (Tokyo Tech), Hokkaido University and the University of Washington explains why. We need to understand this multiphase chemistry in the atmosphere to design an efficient strategy to manage air pollution and accurately predict future air pollution and climate change impacts.
The study, by a team from Duke University, Tsinghua University, Duke Kunshan University and Peking University, appears in the journal JAMA Internal Medicine. They monitored indoor and outdoor ozone levels, along with other pollutants. —Junfeng (Jim) Zhang, from Duke and Duke Kunshan University.
Cutting the amount of short-lived, climate-warming emissions such as soot and methane won’t limit global warming as much as previous studies have suggested, according to a new study from the Joint Global Change Research Institute in College Park, Md., More realistic emission reductions would likely provide an even smaller climate benefit.
A University of California, Riverside assistant professor of chemical and environmental engineering has received a $450,000 grant to study the impact of air-polluting black carbon particles as a way to mitigate climate change. Clouds have an important role in climate change.
In California, reductions in emissions of black carbon since the late 1980s—mostly from diesel engines as a result of air quality programs—have resulted in a measurable reduction of concentrations of global warming pollutants in the atmosphere, according to a study examining the impact of black carbon on California’s climate.
A study published in Nature Climate Change suggests that thermoelectric power plants (i.e., nuclear and fossil-fueled generating units) in Europe and the United States are vulnerable to climate change due to the combined impacts of lower summer river flows and higher river water temperatures. Source: van Vliet et al.
The pilot, the first of its kind in Israel, will be carried out between Tel Aviv University Railway Station and Klatzkin Terminal in Ramat Aviv—a two-kilometer route including 600 meters of electric road.
Scientists from the US, Norway, Russia, Germany, Italy and China are participating in a study examining the potential role of black carbon, or soot, on the rapidly changing Arctic climate. The Arctic climate is changing faster than some scientists expected. In addition to its impacts on snow and ice, black carbon is an air pollutant.
Although viewed as a potential target in the global effort to reduce climate change, atmospheric black carbon particles absorb significantly less sunlight than scientists have predicted, according to a new study by an international team of researchers, published in the journal Science. —Cappa et al. Earlier post.).
—Lin Zhang of Peking University, lead author. Many countries regulate ozone because of the damage the pollutant does to plants and people. Since the 1990s, tighter controls on emissions of those ingredients have lessened ozone pollution in many European and US cities. Xiao Lu, Jiayun Hong, Lin Zhang, Owen R. 8b00366.
FD stoves should be considered for dissemination as improved cookstove programs worldwide begin to consider climate metrics as selection criteria.Our results also have significant implications for health and climate impact studies, as impact estimates based on ND stoves would underestimate the BC reduction potential from ICs.
The researchers found that while EVs do offer a very promising solution to energy issues due to their replacement of petroleum fuels, for now “ the high pollution levels of coal-fired power plants will trade off EVs’ potential energy benefits in China ”. Credit: ACS, Huo et al. Click to enlarge. and NO x emissions. Wang, David G.
Among the transportation-related elements of US President Barack Obama’s new climate action plan, which he is outlining today in a speech at Georgetown University, is the development of new fuel economy standards for heavy-duty vehicles post-2018. Preparing the US for the impacts of climate change. Earlier post.).
Researchers at Wuhan University in China have developed a new electrochemical cell, PANI/Li x Mn 2 O 4 , for selective recovery of Li + ions from brine water with high impurity cations (K + , Na + , Mg 2+ , etc). This method avoids using additional chemicals, offering a high efficiency, pollution?free Zhao et al. Zhao, A. , and Cao, Y.
A shift from gasoline to diesel engines following previous and upcoming European emission standards is consistent with long-term climate mitigation efforts, according to a new analysis by researchers from CICERO (Center for International Climate and Environmental Research, Norway), the University of Oslo and ETH Zurich.
This article shows that including offsets in climate change legislation would likely make an emissions program more cost-effective by: (a) providing an incentive for non-regulated sources to generate emission reductions; and (b) expanding emission compliance opportunities for regulated entities. Assuming the offset is legitimate—i.e.,
Source: University of Leicester. In some parts of Asia, Africa and South America, the researchers identified data gaps which prevented them from characterizing ozone pollution exposure patterns. However, overall, Southern Hemisphere sites tend to have lower ozone pollution levels, and fewer days above 70 ppb. Click to enlarge.
Hyundai Motor Group will collaborate with the Saudi Arabian Oil Company (Aramco) and King Abdullah University of Science and Technology (KAUST) jointly to research and develop an advanced fuel for an ultra lean-burn, spark-ignition engine that aims to lower the overall carbon dioxide emissions of a vehicle.
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