Non-agricultural source dominates the ammonium aerosol in the largest city of South China based on the vertical delta N-15 measurements

doi:10.1016/j.scitotenv.2022.157750

	Non-agricultural source dominates the ammonium aerosol in the largest city of South China based on the vertical delta N-15 measurements
	Chen, Zixi 1,11; Pei, Chenglei 2,3,5,12,13; Liu, Junwen 1,11; Zhang, Xiangyun 2; Ding, Ping 4; Dang, Lan 6; Zong, Zheng 6; Jiang, Fan 1,11; Wu, Lili 1,11; Sun, Xi 7,8; Zhou, Shengzhen 7,8; Zhang, Yanlin 9; Zhang, Zhisheng 10; Zheng, Junyu 1,11; Tian, Chongguo6 ; Li, Jun 2; Zhang, Gan 2
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
	2022-11-20
卷号	848 页码:10
关键词	Ammonia Ammonium Stable nitrogen isotope Canton tower Guangzhou
DOI	10.1016/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.
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)
收录类别	SCI
语种	英语
关键词[WOS]	URBAN BOUNDARY-LAYER ; ATMOSPHERIC AMMONIA ; HIGH-RESOLUTION ; SOURCE APPORTIONMENT ; PARTICULATE MATTER ; EMISSION INVENTORY ; BEIJING INSIGHTS ; SEVERE HAZE ; ISOTOPE ; PM2.5
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:000865990100013
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/31940
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
通讯作者	Liu, Junwen
作者单位	1.Jinan Univ, Inst Environm & Climate Res, Guangzhou, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou, Peoples R China 3.Guangzhou Sub Branch Guangdong Ecol & Environm Mo, Guangzhou, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Key Lab Environm Protect & Resources Ut, Guangzhou, Peoples R China 6.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China 7.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou, Peoples R China 8.Guangdong Prov Observat & Res Stn Climate Enviror, Guangzhou, Peoples R China 9.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Int Joint Lab Climate & Environm Change, Nanjing, Peoples R China 10.Minist Environm Protect, South China Inst Environm Sci, Guangzhou, Peoples R China 11.Guangdong Hongkong Macau Joint Lab Collaborat Inn, Guangzhou, Peoples R China 12.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China 13.Univ Chinese Acad Sci, Beijing, 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.