Evidence of a Large Bias in Rooftop Measurements of Atmospheric Ammonia

doi:10.1021/acsearthspacechem.1c00331

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 粉尘与环境研究室

	Evidence of a Large Bias in Rooftop Measurements of Atmospheric Ammonia
	Kuang, Yaqiong 4; Chang, Yunhua 4; Cheng, Kai 4; Ling, Qingyang 4; Zou, Zhong 3; Huang, Ru-Jin 1,2
刊名	ACS EARTH AND SPACE CHEMISTRY
	2021-12-28
页码	5
关键词	ammonia nonagricultural emissions human excreta ceiling ducts experimental bias
ISSN号	2472-3452
DOI	10.1021/acsearthspacechem.1c00331
通讯作者	Chang, Yunhua(changy13@nuistt.edu.cn)
英文摘要	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.
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关键词	GAS-PHASE AMMONIA ; PARTICULATE MATTER ; EMISSIONS ; CHINA ; NITROGEN ; AEROSOLS ; AREA ; ENVIRONMENT ; INVENTORY ; AMINES
WOS研究方向	Chemistry ; Geochemistry & Geophysics
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000737894500001
资助机构	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)
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/17350]
专题	地球环境研究所_粉尘与环境研究室
通讯作者	Chang, Yunhua
作者单位	1.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth & Environm, Xian 710061, Peoples R China 2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 3.Fudan Univ, Dept Environm Sci & Engn, Inst Atmospher Sci, Shanghai 200433, Peoples R China 4.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Nanjing 210044, 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.