| Evidence of a Large Bias in Rooftop Measurements of Atmospheric Ammonia | |
| Kuang, Yaqiong1; Chang, Yunhua1; Cheng, Kai1; Ling, Qingyang1; Zou, Zhong2; Huang, Ru-Jin3,4 | |
| 通讯作者 | Chang, Yunhua(changy13@nuistt.edu.cn) |
| 2021-12-28 | |
| 发表期刊 | ACS EARTH AND SPACE CHEMISTRY
 |
| ISSN | 2472-3452 |
| 页码 | 5 |
| 摘要 | In contrast to Europe and the U.S., human excreta in urban China are mainly stored in septic tanks beneath buildings, and the generated odors (including NH3) are released into the atmosphere through connecting pipes on the rooftops, that is, ceiling ducts. Here, we show that the levels of NH3 in ceiling ducts were 3 to 5 orders of magnitude higher than urban background concentrations. Unfortunately, urban air quality monitoring sites in China are mostly set on the roofs of various buildings. As the first attempt to investigate the influence of this overlooked NH3 source on the measurements of ambient NH3, hourly measurements of NH3 were performed on the rooftops of four buildings in Nanjing and Shanghai megacities. Although the two buildings in Nanjing are located in the same university campus (1 km apart), NH3 concentrations measured on the rooftop of a teaching building with dense ceiling ducts were on average 2.8 times higher than those of another building without ceiling ducts. In Shanghai, the exhaust vents of two ceiling ducts at a supersite were deliberately extended to a higher position and bent toward a direction downwind of our NH3 instrument. The resulting ambient NH3 concentration was 40% lower than that of another academic building without modification of its ceiling ducts. Besides, the measured NH3 peaks were consistently associated with air plumes from ceiling ducts. Realizing this strong NH3 source is important to avoid its significant influences on the measurement of NH3 and to interpret a large spatial heterogeneity of NH3 concentrations in urban China. |
| 关键词 | ammonia nonagricultural emissions human excreta ceiling ducts experimental bias |
| DOI | 10.1021/acsearthspacechem.1c00331 |
| 关键词[WOS] | GAS-PHASE AMMONIA ; PARTICULATE MATTER ; EMISSIONS ; CHINA ; NITROGEN ; AEROSOLS ; AREA ; ENVIRONMENT ; INVENTORY ; AMINES |
| 收录类别 | SCI ; SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41975166] ; Jiangsu Natural Science Fund for Excellent Young Scholars[BK20211594] ; Opening Project of the State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS[SKLLOGZR2103] ; Opening Project of the State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex (Shanghai Academy of Environment Sciences)[CX2020080583] ; Young Elite Scientist Sponsorship Program by the Jiangsu Provincial Association for Science and Technology ; Opening Project of Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3)[FDLAP19001] |
| WOS研究方向 | Chemistry ; Geochemistry & Geophysics |
| 项目资助者 | National Natural Science Foundation of China ; Jiangsu Natural Science Fund for Excellent Young Scholars ; Opening Project of the State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS ; Opening Project of the State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex (Shanghai Academy of Environment Sciences) ; Young Elite Scientist Sponsorship Program by the Jiangsu Provincial Association for Science and Technology ; Opening Project of Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) |
| WOS类目 | Chemistry, Multidisciplinary ; Geochemistry & Geophysics |
| WOS记录号 | WOS:000737894500001 |
| 出版者 | AMER CHEMICAL SOC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ieecas.cn/handle/361006/17351 |
| 专题 | 粉尘与环境研究室 第四纪科学与全球变化卓越创新中心 中国科学院气溶胶化学与物理重点实验室 |
| 通讯作者 | Chang, Yunhua |
| 作者单位 | 1.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Nanjing 210044, Peoples R China 2.Fudan Univ, Dept Environm Sci & Engn, Inst Atmospher Sci, Shanghai 200433, Peoples R China 3.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 4.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth & Environm, Xian 710061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kuang, Yaqiong,Chang, Yunhua,Cheng, Kai,et al. Evidence of a Large Bias in Rooftop Measurements of Atmospheric Ammonia[J]. ACS EARTH AND SPACE CHEMISTRY,2021:5. |
| APA | Kuang, Yaqiong,Chang, Yunhua,Cheng, Kai,Ling, Qingyang,Zou, Zhong,&Huang, Ru-Jin.(2021).Evidence of a Large Bias in Rooftop Measurements of Atmospheric Ammonia.ACS EARTH AND SPACE CHEMISTRY,5. |
| MLA | Kuang, Yaqiong,et al."Evidence of a Large Bias in Rooftop Measurements of Atmospheric Ammonia".ACS EARTH AND SPACE CHEMISTRY (2021):5. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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