globalchange  > 气候减缓与适应
DOI: 10.1029/2017JD028095
Scopus记录号: 2-s2.0-85047662108
论文题名:
Source Apportionment of Aerosol Ammonium in an Ammonia-Rich Atmosphere: An Isotopic Study of Summer Clean and Hazy Days in Urban Beijing
作者: Pan Y.; Tian S.; Liu D.; Fang Y.; Zhu X.; Gao M.; Wentworth G.R.; Michalski G.; Huang X.; Wang Y.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:10
起始页码: 5681
结束页码: 5689
语种: 英语
英文关键词: ammonia ; ammonium ; haze pollution ; North China Plain ; source apportionment ; stable nitrogen isotope
英文摘要: Aerosol ammonium (NH4 +) can be a major component of fine particles, especially during severe haze episodes. The abatement of ammonia (NH3) emissions is important for reducing fine particles, but NH3 sources remain poorly constrained and are largely unregulated in China and most other regions. This study uses stable isotopes to interpret the role NH3 sources play in generating different sized NH4 + aerosols in Beijing between 21 June and 4 July 2013 with fine particle concentrations of 20–242 μg/m3. The concentrations and nitrogen stable isotope composition of aerosol NH4 + (δ15N-NH4 +) were both elevated during the five haze episodes that were sampled. These increases were driven by enhancements in the fine mode as opposed to substantial increases in the coarse mode aerosol. After accounting for the isotope fractionation that occurs during gas-to-particle partitioning (17.7‰ to 28.2‰), the “initial” (prepartitioning) δ15N-NH3 values were estimated to be −35‰ for a clean period (i.e., a nonhazy day) and ranged from −14.3‰ to −22.8‰ for hazy days. Source apportionment using the “IsoSources” isotopic mixing model indicated that the dominant contribution to NH3 shifted from agricultural sources during the clean period (86%) to fossil fuel emissions (54%–81%) during hazy days and when back trajectories rotate from the northwest to the west and/or south. These results together suggest that even in summer, fossil fuel-related sources from Beijing and the surrounding areas are the major source of NH3 during haze events and that controlling these sources may be important for alleviating particulate matter pollution. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113872
Appears in Collections:气候减缓与适应

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作者单位: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; National Climate Center, China Meteorological Administration, Beijing, China; John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; Environmental Monitoring and Science Division, Alberta Environment and Parks, Edmonton, AB, Canada; Department of Chemistry, Purdue University, West Lafayette, IN, United States

Recommended Citation:
Pan Y.,Tian S.,Liu D.,et al. Source Apportionment of Aerosol Ammonium in an Ammonia-Rich Atmosphere: An Isotopic Study of Summer Clean and Hazy Days in Urban Beijing[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(10)
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