Monoterpenes are the largest source of summertime organic aerosol in the southeastern United States
2018; National Academy of Sciences; Volume: 115; Issue: 9 Linguagem: Inglês
10.1073/pnas.1717513115
ISSN1091-6490
AutoresHaofei Zhang, Lindsay D. Yee, Ben H. Lee, Michael P. Curtis, David R. Worton, Gabriel Isaacman‐VanWertz, John H. Offenberg, Michael Lewandowski, Tadeusz E. Kleindienst, M. R. Beaver, Amara L. Holder, William A. Lonneman, Kenneth S. Docherty, Mohammed Jaoui, Havala O. T. Pye, Weiwei Hu, Douglas A. Day, Pedro Campuzano‐Jost, J. L. Jiménez, Hongyu Guo, Rodney J. Weber, J. A. de Gouw, Abigail R. Koss, Eric S. Edgerton, W. H. Brune, Claudia Mohr, Felipe D. Lopez‐Hilfiker, Anna Lutz, Nathan M. Kreisberg, Steve R. Spielman, Susanne V. Hering, Kevin R. Wilson, Joel A. Thornton, A. H. Goldstein,
Tópico(s)Atmospheric aerosols and clouds
ResumoSignificance Atmospheric fine organic aerosol impacts air quality, climate, and human health. Speciating and quantifying the sources of organic aerosol on the molecular level improves understanding of their formation chemistry and hence the resulting impacts. Such study, however, has not been possible due to the chemical complexity of atmospheric organic aerosol. Here, we provide comprehensive molecular characterization of atmospheric organic aerosol samples from the southeastern United States by combining state-of-the-art high-resolution mass spectrometry techniques. We find that monoterpene secondary organic aerosol accounts for approximately half of total fine organic aerosol. More importantly, the monoterpene secondary organic aerosol mass increases with enhanced nitrogen oxide processing, indicating anthropogenic influence on biogenic secondary organic aerosol formation.
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