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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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Measured emissions included: oxides of nitrogen (NO x ), total hydrocarbons (THC), non-methane hydrocarbon (NMHC), carbon monoxide (CO), carbon dioxide (CO 2 ), PM mass, particulate number, 1,3-butadiene, benzene, toluene, ethylbenzene, xylene isomers, ethanol, and carbonyl compounds.

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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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Scaling of industry sales statistics enabled the discrepancy to be attributed to the use of ancillary solvent products such as screenwash and deicer which are not included in internationally applied vehicle emission methodologies. —Cliff et al. the products used for “car care,” such as windshield washer fluid.

Emissions 397
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Rice University team links PM2.5 and ozone levels with cardiac arrest

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A team from Rice University and the Houston Fire Department EMS has found a direct correlation between out-of-hospital cardiac arrests (OHCA) and levels of air pollution and ozone. Ensor is a professor and chair of Rice’s Department of Statistics, and Raun is a research professor in Rice’s Department of Statistics.

Ozone 231
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Study: 25% EV adoption would save US $17B annually from avoided climate change & pollution damages

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Vehicle electrification in the United States could prevent hundreds to thousands of premature deaths annually while reducing carbon emissions by hundreds of millions of tons. Results show that in more aggressive scenarios—i.e., Resources.

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

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The researchers analyzed extensive satellite and ground-based measurements of nitrogen oxides and carbon monoxide. 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.

Emissions 150
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Study finds modifying urban form may be a strategy to reduce air pollution

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The found that three of the urban form metrics (contiguity, circularity, and vegetation) have a statistically significant relationship with urban NO 2 ; their combined effect could be substantial. Overall, our findings demonstrate that urban form has a statistically significant relationship with urban NO 2 concentrations.

Pollution 231