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Ozone levels across much of North America and Europe dropped significantly between 2000 and 2014. People living in parts of southern Europe, South Korea and southern Japan and China also experienced more than 15 days a year of ozone levels above 70 ppb. Source: University of Leicester. Click to enlarge.
Illustration of projected ozone changes in the South Coast region due to climate change in 2050. Areas in orange and red could see ozone concentrations elevated by 9 to 18 parts per billion. Climate Change Impact on Air Quality in California. Click to enlarge. Kleeman of UC Davis, lead author. Principal Investigator: Michael J.
The two combine in the atmosphere to make either nitric acid or peroxynitrous acid; the so-called branching ratio of these two chemicals is important in models of ozone production. A research team led by NASA’s Jet Propulsion Laboratory and the California Institute of Technology (Caltech), both in Pasadena, Calif.,
Ozone, the main component of smog, is a plant-damaging pollutant formed by emissions from vehicles, cooking stoves and other sources. New research shows that ozone pollution damaged millions of tons of wheat, rice, soybean and cotton crops in India in 2005. Surface ozone pollution in India damaged 6 million metric tons (6.7
As California continues to reduce local sources of ozone, ozone entering the state from the Pacific makes up a larger fraction of measured ozone levels. An ozonesonde is a balloon which measures ozone from the surface to more than 10 kilometers above the ground.
Springtime ozone distributions for 1984, 1995–2008 in the mid-troposphere (3.0–8.0 Springtime ozone levels above western North America are rising primarily due to air flowing eastward from the Pacific Ocean, a trend that is largest when the air originates in Asia. The US EPA recently proposed new tougher ground-level ozone standards.
Exposure to ozone at levels currently deemed safe by the NAAQS clean air standards can have a significant and negative effect on lung function, according to researchers at the University of California, Davis. Edward Schelegle, University of California, Davis. Earlier post.). Specifically, we found that 6.6
Dust, ozone and carbon can accumulate in valleys and basins in California and other Western states. Los Angeles experiences at least one extra day a year of smog that exceeds federal ozone limits because of nitrogen oxides and carbon monoxide emitted by Chinese factories making goods for export, the analysis found.
The global market for rocket launches may require more stringent regulation in order to prevent significant damage to Earth’s stratospheric ozone layer in the decades to come, according to a new study by researchers in California and Colorado. Darin Toohey.
VOCs, primarily emitted from the tailpipes of vehicles, are a key ingredient in the formation of ground-level ozone which, at high levels, can harm people’s lungs and damage crops and other plants. Cooperative Institute for Research in Environmental Sciences (CIRES) at the University of Colorado Boulder. —Warneke et al.
SJC’s deployment is a first for a California airport and among the largest deployments for a US airport. The electric bus fleet is anticipated to reduce ozone emissions by 1.1 The buses and charging systems were designed and manufactured locally by Proterra, based in Burlingame, Calif.
The US Environmental Protection Agency (EPA) announced $5,959,842 million in research funding to nine institutions to improve air quality models used to simulate ozone, particulate matter (PM), regional haze, air toxics, and emerging pollutants. It will also inform the development of strategies for improving air quality.
Researchers at the University of California, Irvine and other institutions have conducted a statistical analysis of pollution exposure and yields from 1980 to 2015 on a key sector making up about 38% of the state’s total agricultural output: perennial crops such as almonds, grapes, nectarines, peaches, strawberries and walnuts.
Among the non-CO 2 pollutants are hydrofluorocarbons (HFCs), methane, tropospheric ozone, and black carbon soot. Reducing tropospheric ozone can improve public health as well as agricultural productivity. The next round of UN climate negotiations begins in Cancun today. million lives lost each year due to black carbon soot.
In a cohort study of a subset of 2050 newborns from the Children’s Health Study in southern California, researchers at the University of Southern California (USC) found that an increase of 2 standard deviations in prenatal exposure to particulate matter in air pollution was associated with higher newborn total thyroxine (TT4) measures.
The California Air Resources Board (CARB) has released the results of a multiyear study evaluating exhaust emissions from the use of California Reformulated Gasoline (CaRFG) that contains 15 volume percent ethanol (E15). California currently limits the ethanol content of gasoline to 10 percent.
But direct measurements in two California regions found black carbon absorption enhancements of just 6%, suggesting that climate models may be overestimating warming by black carbon, the researchers report. Here, direct in situ measurements of BC absorption enhancements (E abs ) and mixing state are reported for two California regions.
Computer scientists at the University of California, San Diego have built a portable pollution sensors that transmit transmit their air quality readings to smart phones, allowing users to monitor air quality in real time. Boxes represent pollution reading locations during that window. Nikzad et al. Click to enlarge. Click to enlarge.
The study, by a team of researchers from Carnegie Mellon University, University of Georgia, Aerodyne Research, California Air Resources Board (ARB), Ohio State University, UC Berkeley, and UC San Diego is published in the ACS journal Environmental Science & Technology. We estimate ozone and SOA formation potential.
Decreases in ambient air pollution levels over the past 20 years in Southern California were associated with significant reductions in bronchitic symptoms in children with and without asthma, according to a study by researchers at the University of Southern California published in JAMA. Kiros Berhane, Ph.D., 2016.3444.
eutrophication; ET = ecological toxicity; FEC = fossil energy consumption; WU = water use; LO = land occupation; “The rest” includes acidification; smog formation; ozone layer depletion; and human health effects. GW = global warming; Eut. Credit: ACS, Yang et al. Click to enlarge.
The researchers analyzed pollutant monitoring and pulmonary health effects information as well as multiple covariates that they had collected over more than 20 years from participants in several cohorts recruited into the Children’s Health Study (CHS) in Southern California.
A new report released by the California Air Resources Board (ARB) has sent a stark warning on the effects of climate change on ozone levels in the state’s major air basins.
The bill also directs the President to work with the relevant Federal agencies and California to harmonize, to the maximum extent possible, the federal fuel economy standards, any emission standards promulgated by EPA, and the California standards for light-duty vehicles. trucks, construction machines, ships and planes.
A report released by the University of California Riverside’s College of Engineering-Center for Environmental Research and Technology (CE-CERT), found that the new 8.9L The engine was certified in the fall of 2016 by the EPA and the California Air Resources Board (CARB) to 0.02
Based on their findings in a new study, researchers from the University of Washington and the University of Minnesota suggest that modifying urban form—as a means of affecting motor vehicle usage—may be a strategy to mitigate urban air pollution. Their paper appears in the ACS journal Environmental Science & Technology.
TPS technology has other applications as well, such as emissions reduction from diesel engines and commercial kitchen exhaust systems, plasma treatment of surfaces for cleaning, as well as ozone generation. Results obtained from work performed under a recent DOE grant showed nearly 80% reduction in particulates from a 1.8 hp diesel engine.
The Edith Hannigan McHale Scholarship may be awarded annually to a female student at John Adams High School in Ozone Park, N.Y. The 2U Scholarship program is available only to students at George Washington University , American University , Syracuse University , Washington University in St.
Results from a new study by researchers at the University of California Irvine support a growing body of scientific literature indicating that sensitive populations, including children, certain ethnic groups and people of lower socioeconomic status, are more vulnerable to the effects of high exposures to traffic-related air pollution.
In case you thought car makers were striving to produce greener alternatives simply to reduce our reliance on fossil fuels, then the University of California has issued a reminder about what these efforts are really all about. The research found that 6.6 The research found that 6.6 hours of exposure.
Researchers at the University of California San Francisco have engineered the industrial yeast S. fermentans ferments cellulosic feedstocks to acetate and ethanol, which the modified S. cerevisiae uses to produce methyl halides. Adapted from Bayer et al. Click to enlarge. cerevisiae to convert biomass to methyl halides with good yield.
Mikhail Chester and Arpad Horvath inventoried on-road, rail, and air travel to determine energy consumption, greenhouse gas (GHG) emissions, and criteria air pollutant (CAP) emissions (excluding PM, lead, and ozone due to lack of data). Chester and Horvath (2009). Click to enlarge.
Researchers from the University of California, Berkeley , found that between 2018 and 2022, CO2 emission from all sources (industries, homes, traffic) across the San Francisco Bay Area dropped around 1.8% California has a goal to reach net-zero emissions by 2045, and Cohen says that we need emissions to drop 3.7%
In a new study published online 10 March in the ACS journal Environmental Science and Technology , however, Stanford University professor Mark Jacobson finds that local CO 2 emissions in isolation may increase local ozone and particulate matter. Although the health impacts of such changes are uncertain, he notes, they are of concern.
Impact of the new chemistry on ambient air quality in the California South Coast Air Basin. (A) A) shows the base case peak concentrations for O 3 (ozone), ClNO and HCl in parts-per-billion by volume (ppbv). (B) Ozone can cause coughing, throat irritation, chest pain and shortness of breath. Raff et al. 2009) Click to enlarge.
University of California, Davis researchers will receive $2.8 Nitrogen-based fertilizers help California farmers produce more than 400 agricultural commodities—vegetables, fruits, meats and dairy products—worth $36 billion a year. But excess nitrogen is emitted from soils, seeps into groundwater and runs off into surface waters.
The largest systematic study ever conducted of human volunteers exposed to ozone air pollution has found no evidence of effects on the heart in its healthy, older participants, but did find effects on the volunteers’ ability to breathe, even at low ambient levels. Possible pathways by which ozone may cause adverse health effects.
These sites will supplemented by additional instrumentation provided by NASA, EPA, Howard University, Pennsylvania State University, the University of Maryland-Baltimore County, and Millersville University in Pennsylvania. Both aircraft will measure ozone and a mixture of soot and PM.
1,000 to 21,000) deaths due to changes in ozone concentrations. 900 to 11,000) ozone-related early deaths per year. 300 to 4,000) ozone-related premature mortalities per year. 2000 (90% CI: 0–4,000) early deaths from ozone, according to the study. 53,000 (90% CI: 24,000–95,000) PM 2.5 related premature deaths and ?5,000
The California Air Resources Board (ARB) cited Dr. Wall for his leadership role in the development and implementation of all the major technology advancements ultimately leading to the near-zero levels of emissions of particulate matter and oxides of nitrogen from engines. Dr. Kirk R.
Results from CHIE studies are used to inform the periodic review of National Ambient Air Quality Standards (NAAQS) for common pollutants, such as ozone and particulate matter (PM), and advise other policy decisions. The NAAQS process has broad health importance because it regulates the outdoor air concentrations of those pollutants.
A recent paper by a pair of researchers from the NASA Goddard Institute for Space (GISS) and Columbia University also found that black carbon is responsible for 50% of the total 1.9 °C F, with about 40% due to ozone. Earlier post.). C increased Arctic warming from 1890 to 2007. Earlier post.).
Air pollution may shorten the survival of patients with lung cancer, suggests a population-based study by a team from the University of Southern California published in the journal Thorax. Participants’ average exposure to nitrogen dioxide (NO 2 ), ozone (O 3 ), particulate matter of less than 10 um, and less than 2.5
Meanwhile, California is seeking to cut the cost of home EV charging through a fixed-charge plan—essentially a package of energy for a flat, reduced fee, with the cost even less for low-income households. Residential electricity rates throughout the nation have soared over the past couple of years. population lives with unhealthy air.
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