气候变化领域集成服务门户(CCPortal): Biogenic emissions and land-atmosphere interactions as drivers of the daytime evolution of secondary organic aerosol in the southeastern US

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DOI	10.5194/acp-19-701-2019
	Biogenic emissions and land-atmosphere interactions as drivers of the daytime evolution of secondary organic aerosol in the southeastern US
	Nagori J.; Janssen R.H.H.; Fry J.L.; Krol M.; Jimenez J.L.; Hu W.; Vilà-Guerau De Arellano J.
发表日期	2019
ISSN	16807316
起始页码	701
结束页码	729
卷号	19 期号:2
英文摘要	The interactions between biogenic volatile organic compounds (BVOCs), like isoprene and monoterpenes, and anthropogenic emissions of nitrogen and sulfur oxides lead to high concentrations of secondary organic aerosol (SOA) in the southeastern United States. To improve our understanding of SOA formation, we study the diurnal evolution of SOA in a land-atmosphere coupling context based on comprehensive surface and upper air observations from a characteristic day during the 2013 Southern Oxidant and Aerosol Study (SOAS) campaign. We use a mixed layer model (MXLCH-SOA) that is updated with new chemical pathways and an interactive land surface scheme that describes both biogeochemical and biogeophysical couplings between the land surface and the atmospheric boundary layer (ABL) to gain insight into the drivers of the daytime evolution of biogenic SOA. MXLCH-SOA reproduces observed BVOC and surface heat fluxes, gas-phase chemistry, and ABL dynamics well, with the exception of isoprene and monoterpene mixing ratios measured close to the land surface. This is likely due to the fact that these species do not have uniform profiles throughout the atmospheric surface layer due to their fast reaction with OH and incomplete mixing near the surface. The flat daytime evolution of the SOA concentration is caused by the dampening of the increase due to locally formed SOA by entrainment of SOA-depleted air from the residual layer. SOA formation from isoprene through the intermediate species isoprene epoxydiols (IEPOXs) and isoprene hydroxyhydroperoxides (ISOPOOHs) is in good agreement with the observations, with a mean isoprene SOA yield of 1.8%. However, SOA from monoterpenes, oxidised by OH and O 3 , dominates the locally produced SOA (69 %), with a mean monoterpene SOA yield of 10.7 %. Isoprene SOA is produced primarily through OH oxidation via ISOPOOH and IEPOX (31 %). Entrainment of aged SOA from the residual layer likely contributes to the observed more oxidised oxygenated organic aerosol (MO-OOA) factor. A sensitivity analysis of the coupled land surface-boundary layer-SOA formation system to changing temperatures reveals that SOA concentrations are buffered under increasing temperatures: A rise in BVOC emissions is offset by decreases in OH concentrations and the efficiency with which SVOCs partition into the aerosol phase. © 2019 Author(s).
语种	英语
scopus关键词	aerosol formation; atmosphere-biosphere interaction; biogenic emission; boundary layer; concentration (composition); land surface; volatile organic compound; United States
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144712
作者单位	Meteorology and Air Quality, Wageningen University, Wageningen, Netherlands; Institute of Marine and Atmospheric Research, University of Utrecht, Utrecht, Netherlands; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Chemistry, Reed College, Portland, OR, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Department of Chemistry, University of Colorado, Boulder, CO, United States
推荐引用方式 GB/T 7714	Nagori J.,Janssen R.H.H.,Fry J.L.,et al. Biogenic emissions and land-atmosphere interactions as drivers of the daytime evolution of secondary organic aerosol in the southeastern US[J],2019,19(2).
APA	Nagori J..,Janssen R.H.H..,Fry J.L..,Krol M..,Jimenez J.L..,...&Vilà-Guerau De Arellano J..(2019).Biogenic emissions and land-atmosphere interactions as drivers of the daytime evolution of secondary organic aerosol in the southeastern US.Atmospheric Chemistry and Physics,19(2).
MLA	Nagori J.,et al."Biogenic emissions and land-atmosphere interactions as drivers of the daytime evolution of secondary organic aerosol in the southeastern US".Atmospheric Chemistry and Physics 19.2(2019).