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Accelerated O3 formation triggered by summer heatwaves in megacity Seoul
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DOI：10.1039/D5EM00629E.png)
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Abstract
En 中文
As compelling evidence of global warming; heatwaves are expected to elevate O3 mixing ratios in highly polluted urban areas. In summer 2018; Seoul; an Asian megacity; experienced elevated O3 levels in conjunction with a temperature surge (maximum of 38.9 °C). This study quantitatively estimates the O3-climate penalty through measurements of nitrogen oxide species; volatile organic compounds (VOCs); and the boundary-layer height; as well as model simulations. The results highlight an acceleration of O3 concentration increment with increased temperature and elevated ozone production efficiency in NOx-saturated conditions. Furthermore; it emphasizes the importance of dynamic boundary-layer processes and increased VOC concentrations resulting from fugitive emissions during the heatwave.
Keywords:
O3 formation
heatwaves
megacity Seoul
nitrogen oxide species
volatile organic compounds
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