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  4. 中科院海岸带环境过程与生态修复重点实验室
Non-agricultural source dominates the ammonium aerosol in the largest city of South China based on the vertical delta N-15 measurements

文献类型：期刊论文

作者Chen, Zixi3,13; Pei, Chenglei1,2,9,11,12; Liu, Junwen3,13; Zhang, Xiangyun12; Ding, Ping10; Dang, Lan8; Zong, Zheng8; Jiang, Fan3,13; Wu, Lili3,13; Sun, Xi6,7
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2022-11-20
卷号848页码:10
ISSN号0048-9697
关键词Ammonia Ammonium Stable nitrogen isotope Canton tower Guangzhou
DOI10.1016/j.scitotenv.2022.157750
通讯作者Liu, Junwen(liu.junwen@jnu.edu.cn)
英文摘要Ammonia (NH3) is the most prevalent alkaline gas in the atmosphere and plays a critical role in air pollution and public health. However, scientific debate remains over whether agricultural emissions (e.g., livestock and fertilizer application) dominate NH3 in urban atmosphere in China, which is one of the largest NH3 emitters in the world. In this study, we first simultaneously collected the fine atmospheric particles (PM2.5) at two heights (ground and 488 m) using the atmospheric observatories in Canton Tower, Guangzhou city, China for the measurements of stable nitrogen isotope composition in ammonium (delta N-15-NH4+). Our results showed that the average delta N-15-NH4+ value at the ground and the 488 m observatory were 16.9 parts per thousand and 3.8 parts per thousand, respectively, implying that NH4+ aerosols between the two heights probably have different sources. Moreover, we found that the delta N-15-NH4+ value would sharply decrease to - 16.7 parts per thousand when the air masses came from western Guangzhou, where the urbanization is limited compared to other surrounding areas. The Bayesian mixing model indicated that NH4+ aerosol at the ground observatory was mainly derived from non-agricultural activities (76 %, e.g., vehicular exhaust), with the rest from agricultural sources (24 %). As for the 488 m observatory, the contribution of non-agricultural sources was 53 %, which is lower than the ground observatory. This is expected as the lower air receives more impacts from the local urban emission. However, the current "bottom-up" emission inventory illustrates that only similar to 20 % NH3 in Guangzhou is associated with non-agricultural emissions, which is significantly lower than our delta N-15-based results. Overall, our findings strongly imply that non-agricultural sources dominate the urban NH3 in Guangzhou or maybe in adjacent cities of the Pearl River Delta region as well, suggesting that the emission inventory of NH3 in this region probably is urgently needed to be revisited in future studies.
WOS关键词URBAN BOUNDARY-LAYER ; ATMOSPHERIC AMMONIA ; HIGH-RESOLUTION ; SOURCE APPORTIONMENT ; PARTICULATE MATTER ; EMISSION INVENTORY ; BEIJING INSIGHTS ; SEVERE HAZE ; ISOTOPE ; PM2.5
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000865990100013
资助机构Key-Area Research and Development Program of Guangdong Province ; National Natural Science Foundation of China ; Special Fund Project for Science and Technology Innovation Strategy of Guangdong Province ; Science and Technology Program of Guangdong Province (Science and Technology Innovation Platform Category)
源URL[http://ir.yic.ac.cn/handle/133337/31939]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
烟台海岸带研究所_近岸生态与环境实验室
通讯作者Liu, Junwen
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China
3.Guangdong Hongkong Macau Joint Lab Collaborat Inn, Guangzhou, Peoples R China
4.Minist Environm Protect, South China Inst Environm Sci, Guangzhou, Peoples R China
5.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Int Joint Lab Climate & Environm Change, Nanjing, Peoples R China
6.Guangdong Prov Observat & Res Stn Climate Enviror, Guangzhou, Peoples R China
7.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou, Peoples R China
8.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China
9.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Key Lab Environm Protect & Resources Ut, Guangzhou, Peoples R China
10.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Zixi,Pei, Chenglei,Liu, Junwen,et al. Non-agricultural source dominates the ammonium aerosol in the largest city of South China based on the vertical delta N-15 measurements[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,848:10.
APA Chen, Zixi.,Pei, Chenglei.,Liu, Junwen.,Zhang, Xiangyun.,Ding, Ping.,...&Zhang, Gan.(2022).Non-agricultural source dominates the ammonium aerosol in the largest city of South China based on the vertical delta N-15 measurements.SCIENCE OF THE TOTAL ENVIRONMENT,848,10.
MLA Chen, Zixi,et al."Non-agricultural source dominates the ammonium aerosol in the largest city of South China based on the vertical delta N-15 measurements".SCIENCE OF THE TOTAL ENVIRONMENT 848(2022):10.

入库方式： OAI收割

来源：烟台海岸带研究所

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