Temperature-dependent emissions dominate aerosol and ozone formation in Los Angeles

• 成果类型: Article
• 署名作者: Pfannerstill, Eva Y.; Arata, Caleb; Zhu, Qindan; Schulze, Benjamin C.; Ward, Ryan; Woods, Roy; Harkins, Colin; Schwantes, Rebecca H.; Seinfeld, John H.; Bucholtz, Anthony; Cohen, Ronald C.; Goldstein, Allen H.
• 署名单位: University of California System; University of California Berkeley; University of California System; University of California Berkeley; University of Colorado System; University of Colorado Boulder; California Institute of Technology; United States Department of Defense; United States Navy; Naval Postgraduate School; University of California System; University of California Berkeley; University of California System; University of California Berkeley
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8534
• DOI: 10.1126/science.adg8204
• 发表日期: 2024-06-21
• 页码: 1324-1329
• 关键词: airborne flux measurements; volatile organic-compounds; eddy-covariance data; total oh reactivity; atmospheric chemistry; air-quality; nox fluxes; isoprene; IMPACT; variability

摘要

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 similar to 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. This implies that control of nitrogen oxides is key to reducing ozone formation in Los Angeles. We also show some anthropogenic VOC emissions increase with temperature, which is an effect not represented in current inventories. Air pollution mitigation efforts must consider that climate warming will strongly change emission amounts and composition.