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Influence of Oil and Gas End-Use on Summertime Particulate Matter and Ozone Pollution in the Eastern US. | LitMetric

AI Article Synopsis

  • The impact of oil and gas activities on air quality, especially in areas with high biogenic emissions of isoprene, is complicated and not well-researched.
  • The study uses the GEOS-Chem model to analyze how emissions from these activities affect air quality in the eastern US during summer, showing that they can increase harmful pollutants like formaldehyde and ozone.
  • The findings indicate that summer air quality could be significantly worsened in similar regions, particularly in tropical areas with constant biogenic emissions and minimal regulation on oil and gas activities.

Article Abstract

The influence of oil and gas end-use activities on ambient air quality is complex and understudied, particularly in regions where intensive end-use activities and large biogenic emissions of isoprene coincide. In these regions, vehicular emissions of nitrogen oxides (NO≡NO + NO) modulate the oxidative fate of isoprene, a biogenic precursor of the harmful air pollutants ozone, formaldehyde, and particulate matter (PM). Here, we investigate the direct and indirect influence of the end-use emissions on ambient air quality. To do so, we use the GEOS-Chem model with focus on the eastern United States (US) in summer. Regional mean end-use NO of 1.4 ppb suppresses isoprene secondary organic aerosol (OA) formation by just 0.02 μg m and enhances abundance of the carcinogen formaldehyde by 0.3 ppb. Formation of other reactive oxygenated volatile organic compounds is also enhanced, contributing to end-use maximum daily mean 8-h ozone (MDA8 O) of 8 ppb. End-use PM is mostly (67%) anthropogenic OA, followed by 20% secondary inorganic sulfate, nitrate and ammonium and 11% black carbon. These adverse effects on eastern US summertime air quality suggest potential for severe air quality degradation in regions like the tropics with year-round biogenic emissions, growing oil and gas end-use and limited environmental regulation.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11542890PMC
http://dx.doi.org/10.1021/acs.est.4c10032DOI Listing

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