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New statistical method to detect ozone pollution hot spots and monitor instrument failure; combining PCA and MEWMA

Green Car Congress

A new statistical method developed by researchers at KAUST (King Abdullah University of Science and Technology, Saudi Arabia) can detect abnormal ozone levels within large bodies of monitored data. Ozone is the reactive form of oxygen that contains three atoms per molecule (O 3 ) rather than the normal two.

Ozone 150
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UK researchers report that alcohols in windshield washer fluid are major unreported source of VOCs emissions from cars, including EVs

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In a recent open-access paper published in ACS’ Environmental Science & Technology , researchers from the University of York report that alcohols in windshield washer fluid account for a larger fraction of real-world vehicle emissions than previous estimates have suggested. Cliff et al.

Emissions 397
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CARB releases results of multi-year E15 study; multiple air quality benefits with slight reduction in fuel economy

Green Car Congress

The study was performed by a team from the University of California at Riverside (UCR) Bourns College of Engineering – Center for Environmental Research and Technology (CE-CERT). One hybrid electric vehicle (HEV) equipped with a PFI engine was also used. California currently limits the ethanol content of gasoline to 10 percent.

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Study: 25% EV adoption would save US $17B annually from avoided climate change & pollution damages

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A new study led by researchers from Northwestern University projects that if electric vehicles replaced 25% of combustion engine cars currently on the road, the United States would save approximately $17 billion annually by avoiding damages from climate change and air pollution. Results show that in more aggressive scenarios—i.e.,

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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. Jathar, Colorado State University and UC Davis; Ali Akherati, Colorado State University; Jose L.

Pollution 264
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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.

Emissions 150
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Study finds air quality models significantly underestimate traffic as source of NOx in Europe

Green Car Congress

Traffic contributes more to NO x emissions in Europe than previously thought, according to a new study by a team at the University of Innsbruck. Using statistical methods, the scientists infer emissions from these data within a radius of about one kilometer of the measurement location. We record 36,000 data points per hour.

Europe 150