TOAR shows present-day global ozone distribution and trends relevant to health; public database

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Ozone levels across much of North America and Europe dropped significantly between 2000 and 2014. Even so, during 2010-2014, people in parts of California, Arizona, Colorado, Texas, the Midwest and the Middle Atlantic still experienced more than 15 days a year in which ozone levels exceeded the US health-based air quality standard of 70 parts per billion (ppb) averaged over eight hours. Trends in daily maximum ozone levels (known as 4MDA8) at urban and non-urban sites.

2018 216

Study finds pollution emitted near equator has biggest impact on global ozone

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Researchers from the University of North Carolina at Chapel Hill, the University of Colorado, Boulder and their colleagues have now shown that this changing global emissions map is creating more total tropospheric ozone worldwide compared to the amount of pollution being emitted, signaling an effect that could be difficult to reign in without strategic policy planning. Emissions are growing in places where there is a much greater effect on the formation of ozone.

2016 199
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Study quantifies impact of oil and gas emissions on Denver’s ozone problem

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The first peer-reviewed study to directly quantify how emissions from oil and natural gas (O&NG) activities influence summertime tropospheric ozone (O 3 ) pollution in the Colorado Front Range confirms that chemical vapors from oil and gas activities are a significant contributor to the region’s chronic ozone problem. Colorado’s northern Front Range was an interesting location for this study for a number of reasons, the researchers said.

Denver 150

Satellite method provides insight into ozone-NOx-VOCs sensitivity for different locations

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Ozone pollution near Earth’s surface is one of the main ingredients of summertime smog. It is also not directly measurable from space due to the abundance of ozone higher in the atmosphere, which obscures measurements of surface ozone. New NASA-funded research has devised a way to use satellite measurements of the precursor gases that contribute to ozone formation to differentiate among three different sets of conditions that lead to its production.

2017 150

FHWA awards Colorado $30M for CNG fueling stations

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The Federal Highway Administration’s Congestion, Mitigation and Air Quality ( CMAQ ) program will provide $30 million to increase Colorado’s natural gas fueling infrastructure. Increased use of natural gas as a transportation fuel diversifies Colorado’s portfolio, supports locally produced energy, improves air quality and can save money through lower fuel costs. These stations will help ensure an NGV owner can drive nearly anywhere across the state fueled by Colorado-produced gas.

Study links ambient PM2.5 and ozone specifically caused by vehicle exhaust emissions to ~361,000 premature deaths worldwide in 2010 and ~385,000 in 2015

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and ozone deaths, associated mortality rates, and population in G20 economies in 2015. The study, by researchers from the International Council on Clean Transportation (ICCT); George Washington University Milken Institute School of Public Health; and the University of Colorado Boulder, links state-of-the-art vehicle emissions, air pollution, and epidemiological models to estimate health impacts at the global, regional, national, and local levels in 2010 and 2015.

2019 201

Study finds rising temperatures increase risk of unhealthy ozone levels absent sharp cuts in precursors

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Ozone pollution across the continental United States will become far more difficult to keep in check as temperatures rise, according to new work led by the National Center for Atmospheric Research (NCAR). The study shows that Americans face the risk of a 70% increase in unhealthy summertime ozone levels by 2050, assuming continued greenhouse gas emissions with resultant significant warming (IPCC Scenario A2 and RCP (Representative Concentration Pathway) 8.5.). Ozone formation.

2014 179

Airborne measurements show ozone-forming VOCs emissions from ethanol plant higher than government estimates

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VOCs and nitrogen oxides react with sunlight to form ground-level ozone, the main component of smog. The new study is one of the first and most detailed investigations of emissions from fuel ethanol production, according to its lead author Joost de Gouw, a scientist at the Cooperative Institute for Research in Environmental Sciences at the University of Colorado Boulder and NOAA’s Earth System Research Laboratory in Boulder, Colorado.

2015 179

Modelling the Impact of PHEVs on Ozone in Denver

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Researchers at the University of Colorado, Boulder and the National Renewable Energy Laboratory (NREL) modeled the emissions impact had plug-in hybrid electric vehicles (PHEVs) replaced light duty gasoline vehicles in the Denver, Colorado area in summer 2006. The ozone response to PHEV penetration was modeled under a wide range of meteorological conditions, as experienced during July 2006. Ozone concentration increases were modeled for small areas near central Denver.

Denver 161

Using Ozone-Generated Bubbles to Remove Oil Sheen and Contaminants from Water

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A University of Utah engineer has developed an inexpensive new method to remove oil sheen by repeatedly pressurizing and depressurizing ozone gas, creating microscopic bubbles that attack the oil so it can be removed by sand filters. Instead of ozone, air and metal-grabbing chelating agents would be pressurized with a slurry of the contaminated material. The ozone in the bubble attacks certain pollutants because it is a strong oxidant.

2009 179

Study Concludes that Rocket Launches May Need Regulation to Prevent Ozone Depletion

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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. If left unregulated, rocket launches by the year 2050 could result in more ozone destruction than was ever realized by CFCs.” This raises the possibility of regulation of space launch systems in the name of ozone protection.

2009 150

EPA awards $6M in research funding to improve air quality models

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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. University of Colorado Boulder to incorporate volatile chemical products compounds to current chemical mechanisms to improve air quality model predictions of ozone in US urban areas.

2020 184

UCI-led study finds California’s strict air quality regulations have helped farmers

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They found that reductions in ground ozone during this 35-year period resulted in $600 million in increased production annually by the early 2010s. The researchers also projected yield changes up to 2050 under various scenarios, determining that expected declines in ambient ozone will result in a 5% boost in wine grapes, an 8% climb in nectarines and a 20% jump in table grapes. 2020) “Impacts of ozone and climate change on yields of perennial crops in California.”

2020 170

International study finds air pollution leads to millions of hospital visits for asthma attacks worldwide

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Air pollution—specifically PM 2.5 , ozone and NO 2 —could be to blame for up to 33 million emergency asthma attack visits to hospital a year, according to a new open-access study published in the journal Environmental Health Perspectives. The researchers aimed to estimate the number of asthma emergency room visits and new onset asthma cases globally attributable to PM 2.5 , ozone, and NO 2 concentrations. 37% and 73% of ozone and PM 2.5

2018 184

Study finds that current approach to limiting wintertime pollution may initially backfire

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The processes that create ozone pollution in the summer can also trigger the formation of wintertime air pollution, according to a new study from researchers at the University of Colorado Boulder and NOAA, in partnership with the University of Utah. Based on the observations from the field campaign, Womack, Lin and their colleagues found that ozone and ammonium nitrate aerosol pollution are closely related, connected by the unusually named parameter “total odd oxygen.”

2019 195

MIT study: half of US deaths related to air pollution are linked to out-of-state emissions

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Barrett and his colleagues developed such tools, drawing on fundamental work by Daven Henze at the University of Colorado at Boulder, to track how every state in the contiguous US affects pollution and health outcomes in every other state. and/or ozone.

2020 265

CU Boulder study: routine household activities generate air quality on par with major polluted city

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Cooking, cleaning and other routine household activities generate significant levels of volatile and particulate chemicals inside the average home, leading to indoor air quality levels on par with a polluted major city, according to a study by researchers at the University of Colorado Boulder. Ozone and fine particulates are monitored by the EPA, but data for airborne toxins like formaldehyde and benzene and compounds like alcohols and ketones that originate from the home are very sparse.

2019 186

Study: consumer products overtake transportation as largest source of VOCs air pollution in cities

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The results, published in an open-access paper in the journal Science , suggest that the focus of efforts to mitigate ozone formation and toxic chemical burdens need to be adjusted, the authors suggested. Further, oxidation of VOCs in the presence of nitrogen oxides (NO x = NO + NO 2 ) also contributes to tropospheric ozone (O 3 ), which increases risks of mortality from respiratory diseases. CIRES is a partnership of NOAA and the University of Colorado Boulder.

2018 226

Study finds significant slowdown in decrease of NOx emissions in US; implications for air quality management

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They found that levels of pollutants that can contribute to the formation of ground-level ozone, or smog, have failed to continue a fairly steady decline as estimated by the US Environmental Protection Agency. These results show that meeting future air quality standards for ozone pollution will be more challenging than previously thought.

2018 150

NOAA, partners find about 98% decline in VOCs concentrations in LA Basin over last 50 years despite 3x increase in use of gasoline and diesel

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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. The 98% drop in VOCs in the last 50 years does not mean that ozone levels have dropped that steeply; the air chemistry that leads from VOCs to ozone is more complex than that.

2012 236

New international study finds lab testing of diesel NOx emissions underestimates real-world levels by up to 50%

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in collaboration with scientists at the University of York’s Stockholm Environment Institute (SEI); University of Colorado; and the International Institute for Applied Systems Analysis, assessed 30 studies of vehicle emissions under real-world driving conditions in 11 major vehicle markets representing 80% of new diesel vehicle sales in 2015. In Europe, the ozone mortality burden each year would be 10% lower if diesel vehicle nitrogen oxide emissions were in line with certification limits.

2017 201

Critical review finds actual measurement data on segments of natural gas lifecycle sparse or lacking

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The team, from the Desert Research Institute, University of Colorado Boulder and NOAA, and Stanford University, began by defining a consistent vocabulary, first by jettisoning the popular umbrella label of “fracking” applied to unconventional oil and natural gas development. Air emissions from the natural gas life cycle include greenhouse gases, ozone precursors (volatile organic compounds and nitrogen oxides), air toxics, and particulates.

2014 191

Researchers report on potential long-range atmospheric emissions impacts of increased ethanol fuel use in North America

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A study by a team of researchers from the University of Minnesota; University of Colorado, Boulder; National Center for Atmospheric Research; and NASA Ames Research Center have used an ensemble of aircraft measurements combined with the GEOS-Chem chemical transport model to to gauge potential long-range emissions impacts of increased ethanol fuel use in North America. This is accompanied by a modest regional decrease in surface ozone (of order 1%).