Publications by authors named "E Y Pfannerstill"
Article Synopsis
- The decline in vehicle emissions highlights the increasing role of Volatile Organic Compounds (VOCs) from Volatile Chemical Products (VCP), but their complex chemistry poses challenges for accurate modeling.
- Researchers developed a new chemical mechanism called RACM2B-VCP to better represent VOC emissions from VCP sources, specifically in urban settings like Los Angeles.
- Model evaluations show promising results, indicating that over 50% of anthropogenic VOC reactivity and ozone enhancement in the area is linked to VCP emissions, despite some remaining discrepancies in the model's overall VOC reactivity predictions.
Despite declines in transportation emissions, urban North America and Europe still face unhealthy air pollution levels. This has challenged conventional understanding of the sources of their volatile organic compound (VOC) precursors. Using airborne flux measurements to map emissions of a wide range of VOCs, we demonstrate that biogenic terpenoid emissions contribute ~60% of emitted VOC OH reactivity, ozone, and secondary organic aerosol formation potential in summertime Los Angeles and that this contribution strongly increases with temperature.
View Article and Find Full Text PDFState inventories indicate that dairy operations account for nearly half of California's methane budget. Recent analyses suggest, however, that these emissions may be underestimated, complicating efforts to develop emission reduction strategies. Here, we report estimates of dairy methane emissions in the southern San Joaquin Valley (SJV) of California in June 2021 using airborne flux measurements.
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