气候变化领域集成服务门户(CCPortal): Enhanced atmospheric nitrogen deposition at a rural site in northwest China from 2011 to 2018

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DOI	10.1016/j.atmosres.2020.105071
	Enhanced atmospheric nitrogen deposition at a rural site in northwest China from 2011 to 2018
	Fu Y.; Xu W.; Wen Z.; Han M.; Sun J.; Tang A.; Liu X.
发表日期	2020
ISSN	0169-8095
卷号	245
英文摘要	Few related studies have been carried out for northwest China's the inland, although the increasing inorganic reactive nitrogen (Nr) deposition and severe air pollution in China have attracted considerable attention. Based on eight-year measurements of the concentrations of NH3, HNO3, particulate (p) NH4 +, pNO3 −, and NO2 in the air and inorganic nitrogen (NH4 +, NO3 −) in the precipitation at a rural site in Wuwei, Gansu Province, we quantified the dry and bulk/wet Nr deposition fluxes and analyzed their temporal trends in combination with air pollution data (2015–2018). The concentrations of the single Nr species in the air did not exhibit significant seasonal variations, except for that of pNO3 − which were the highest in summer and the lowest in winter. The average annual total Nr (dry + bulk) deposition was 27.2 ± 6.7 kg N ha−1 with a significant (p < .05) annual increase rate of 10%, which was dominated by the dry deposition flux (20.8 ± 7.1 kg N ha−1 yr−1) during the entire period. The NH4 +-N and NO3 −-N deposition fluxes in the precipitation were significantly (p < .05) higher in the summer than in the other three seasons owing to the heavy rainfall. The reduced N (NH3, pNH4 +, and NH4 +) deposition flux was 4.7 times that of the oxidized N (HNO3, pNO3 −, NO2, and NO3 −), which increased with a high annual rate (25%). The annual mean concentrations of the main air pollutants (PM2.5, PM10, SO2, NO2, and CO) significantly decreased by 15%–76%; in contrast, increasing trends of the O3 and NH3 concentrations were observed. Our results highlight the importance of the control of NH3 emissions and O3 pollution to comprehensively mitigate N deposition and improve air quality in the considered region. © 2020 Elsevier B.V.
关键词	Air quality Ammonia Nitrogen Nitrogen oxides Precipitation (meteorology)Air pollution in chinas Atmospheric nitrogen deposition Deposition fluxes Dry deposition fluxes Inorganic nitrogen Reactive nitrogen Seasonal variation Temporal trends Air pollution control air quality ammonia atmospheric deposition atmospheric pollution concentration (composition)nitrogen ozone rural area seasonal variation China Gansu Wuwei
语种	英语
来源机构	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132389
推荐引用方式 GB/T 7714	Fu Y.,Xu W.,Wen Z.,et al. Enhanced atmospheric nitrogen deposition at a rural site in northwest China from 2011 to 2018[J]. Atmospheric Research,2020,245.
APA	Fu Y..,Xu W..,Wen Z..,Han M..,Sun J..,...&Liu X..(2020).Enhanced atmospheric nitrogen deposition at a rural site in northwest China from 2011 to 2018.,245.
MLA	Fu Y.,et al."Enhanced atmospheric nitrogen deposition at a rural site in northwest China from 2011 to 2018".245(2020).