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| DOI | 10.1016/j.atmosenv.2020.117795 |
| Seasonal variation of aerosol composition in Orange County; Southern California | |
| Mackey K.R.M.; Stragier S.; Robledo L.; Cat L.A.; Xu X.; Capps S.; Treseder K.K.; Czimczik C.I.; Faiola C. | |
| 发表日期 | 2021 |
| ISSN | 13522310 |
| 卷号 | 244 |
| 英文摘要 | Southern California is an urban metropolis bordered by mountains to the north and east and the Pacific Ocean to the west. Its unique geography and climatological features lead to annual patterns in atmospheric aerosol content from natural and anthropogenic sources. Here we sought to determine the nitrogen (N, including NO3−, NH4+, and total N) content of Southern California particulate matter (PM2.5) collected in Orange County, CA, and to identify relevant sources and processes that affect PM2.5 abundance and chemistry in different seasons. PM2.5 carbon (C) and N isotopic compositions (δ13C and δ15N, respectively) suggested that the C content of the PM2.5 derived partly from the marine inversion layer that occurs in the months of May through July. The high N content and δ15N values of PM2.5 collected in summer suggest a contribution from anthropogenic emissions, which are likely trapped in the basin by the inversion layer. In contrast, winter PM2.5 had a lower N content per volume of air, and δ13C values indicated a greater terrestrial signal, consistent with easterly winds. This trend was particularly evident in samples collected during high velocity Santa Ana wind events, which bring terrestrial material from the Great Basin and mountainous regions to the east of Southern California. Based on these observations, we suggest that atmospheric deposition of N is more likely to affect terrestrial ecosystems in the summer, when N content is high and aerosols are trapped by the inversion layer, whereas coastal marine ecosystems are more likely to be affected in the winter when westward winds are more common. © 2020 |
| 英文关键词 | Ammonium; Carbon; Inversion layer; Marine layer; Nitrate; Nitrogen; Santa Ana winds; Urban aerosol |
| 语种 | 英语 |
| scopus关键词 | Atmospheric chemistry; Citrus fruits; Ecosystems; Inversion layers; Meteorological problems; Aerosol composition; Anthropogenic emissions; Anthropogenic sources; Atmospheric depositions; Coastal marine ecosystems; Isotopic composition; Mountainous regions; Terrestrial ecosystems; Atmospheric aerosols; aerosol; anthropogenic source; inversion layer; nitrogen; particulate matter; terrestrial ecosystem; California; Great Basin; Orange County [California]; Santa Ana [California]; United States |
| 来源期刊 | Atmospheric Environment
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/144818 |
| 作者单位 | Earth System Science, University of California Irvine, Irvine, CA 92697, United States; Ecology and Evolutionary Biology, University of California Irvine, Irvine, CA 92697, United States; Atmospheric Data Solutions LLC, 1992 Racquet Hill Santa AnaCA 92705, United States |
| 推荐引用方式 GB/T 7714 | Mackey K.R.M.,Stragier S.,Robledo L.,et al. Seasonal variation of aerosol composition in Orange County; Southern California[J],2021,244. |
| APA | Mackey K.R.M..,Stragier S..,Robledo L..,Cat L.A..,Xu X..,...&Faiola C..(2021).Seasonal variation of aerosol composition in Orange County; Southern California.Atmospheric Environment,244. |
| MLA | Mackey K.R.M.,et al."Seasonal variation of aerosol composition in Orange County; Southern California".Atmospheric Environment 244(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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