气候变化领域集成服务门户(CCPortal): The formation and mitigation of nitrate pollution: comparison between urban and suburban environments

CCPortal

DOI	10.5194/acp-22-4539-2022
	The formation and mitigation of nitrate pollution: comparison between urban and suburban environments
	Yang, Suxia; Yuan, Bin; Peng, Yuwen; Huang, Shan; Chen, Wei; Hu, Weiwei; Pei, Chenglei; Zhou, Jun; Parrish, David D.; Wang, Wenjie; He, Xianjun; Cheng, Chunlei; Li, Xiao-Bing; Yang, Xiaoyun; Song, Yu; Wang, Haichao; Qi, Jipeng; Wang, Baolin; Wang, Chen; Wang, Chaomin; Wang, Zelong; Li, Tiange; Zheng, E.; Wang, Sihang; Wu, Caihong; Cai, Mingfu; Ye, Chenshuo; Song, Wei; Cheng, Peng; Chen, Duohong; Wang, Xinming; Zhang, Zhanyi; Wang, Xuemei; Zheng, Junyu; Shao, Min
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	4539
结束页码	4556
卷号	22 期号:7 页码:18
英文摘要	Ambient nitrate has been of increasing concern in PM2.5, while there are still large uncertainties in quantifying the formation of nitrate aerosol. The formation pathways of nitrate aerosol at an urban site and a suburban site in the Pearl River Delta (PRD) are investigated using an observation-constrained box model. Throughout the campaigns, aerosol pollution episodes were constantly accompanied with the increase in nitrate concentrations and fractions at both urban and suburban sites. The simulations demonstrate that chemical reactions in the daytime and at night both contributed significantly to formation of nitrate in the boundary layer at the two sites. However, night-time reactions predominantly occurred aloft in the residual layer at the urban site, and downward transport from the residual layer in the morning is an important source (53 %) for surface nitrate at the urban site, whereas similar amounts of nitrate were produced in the nocturnal boundary layer and residual layer at the suburban site, which results in little downward transport of nitrate from the residual layer to the ground at the suburban site. We show that nitrate formation was in the volatile-organic-compound-limited (VOC-limited) regime at the urban site, and in the transition regime at the suburban site, identical to the response of ozone at both sites. The reduction of VOC emissions can be an efficient approach to mitigate nitrate in both urban and suburban areas through influencing hydroxyl radical (OH) and N2O5 production, which will also be beneficial for the synergistic control of regional ozone pollution. The results highlight that the relative importance of nitrate formation pathways and ozone can be site-specific, and the quantitative understanding of various pathways of nitrate formation will provide insights for developing nitrate and ozone mitigation strategies.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000792369700001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273787
作者单位	Jinan University; Jinan University; Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Peking University; Jinan University; Sun Yat Sen University; Qilu University of Technology
推荐引用方式 GB/T 7714	Yang, Suxia,Yuan, Bin,Peng, Yuwen,et al. The formation and mitigation of nitrate pollution: comparison between urban and suburban environments[J],2022,22(7):18.
APA	Yang, Suxia.,Yuan, Bin.,Peng, Yuwen.,Huang, Shan.,Chen, Wei.,...&Shao, Min.(2022).The formation and mitigation of nitrate pollution: comparison between urban and suburban environments.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(7),18.
MLA	Yang, Suxia,et al."The formation and mitigation of nitrate pollution: comparison between urban and suburban environments".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.7(2022):18.