Real-Time Characterization of Aerosol Particle Composition above the Urban Canopy in Beijing: Insights into the Interactions between the Atmospheric Boundary Layer and Aerosol Chemistry

Environmental Science & Technology
Yele SunDouglas R Worsnop

Abstract

Despite extensive efforts into the characterization of air pollution during the past decade, real-time characterization of aerosol particle composition above the urban canopy in the megacity Beijing has never been performed to date. Here we conducted the first simultaneous real-time measurements of aerosol composition at two different heights at the same location in urban Beijing from December 19, 2013 to January 2, 2014. The nonrefractory submicron aerosol (NR-PM1) species were measured in situ by a high-resolution aerosol mass spectrometer at near-ground level and an aerosol chemical speciation monitor at 260 m on a 325 m meteorological tower in Beijing. Secondary aerosol showed similar temporal variations between ground level and 260 m, whereas much weaker correlations were found for the primary aerosol. The diurnal evolution of the ratios and correlations of aerosol species between 260 m and the ground level further illustrated a complex interaction between vertical mixing processes and local source emissions on aerosol chemistry in the atmospheric boundary layer. As a result, the aerosol compositions at the two heights were substantially different. Organic aerosol (OA), mainly composed of primary OA (62%), at the ground le...Continue Reading

References

Jun 2, 2007·Environmental Science & Technology·Qi ZhangManjula Canagaratna
Oct 6, 2011·Analytical and Bioanalytical Chemistry·Qi ZhangYele Sun
Oct 6, 2012·The Journal of Surgical Research·Liyu XingMichael G Franz
Nov 26, 2014·Proceedings of the National Academy of Sciences of the United States of America·Song GuoRenyi Zhang

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Citations

Feb 20, 2016·Scientific Reports·Yele SunDouglas R Worsnop
Jul 17, 2020·Environmental Science. Processes & Impacts·Wei ZhouYele Sun
Dec 29, 2020·The Science of the Total Environment·Feng WangYinchang Feng
Mar 24, 2021·The Journal of Physical Chemistry. a·Guoying WangZhijun Wu
Sep 15, 2020·Environmental Science & Technology·Wenqian ZhangMaofa Ge
Jun 27, 2020·Environmental Science & Technology·Xiaorui ChenYuanhang Zhang

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