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

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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. Khadraoui, S. &

Ozone 150
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CARB releases results of multi-year E15 study; multiple air quality benefits with slight reduction in fuel economy

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

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There are widespread policy assumptions that the phase-out of gasoline and diesel internal combustion engines will over time lead to much reduced emissions of Volatile Organic Compounds (VOCs) from road transport and related fuels. Cliff et al. While some VOCs are released in exhaust, others may arise from an unexpected source—e.g.,

Emissions 397
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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. The open-access paper is published in AGU’s journal GeoHealth.

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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. Total VOC emission factors for end uses of petrochemical sources in the study. 1A) and sales data of volatile chemical products.

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

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The recent diesel scandal showed, for example, that measurements at engine test stands based on the New European Driving Cycle (NEDC) or similar emission testing procedures can be highly uncertain for predicting actual environmental impacts. We record 36,000 data points per hour. —Thomas Karl. —Karl et al.

Europe 150