气候变化领域集成服务门户(CCPortal): Nitrate aerosol formation and source assessment in winter at different regions in Northeast China

CCPortal

DOI	10.1016/j.atmosenv.2021.118767
	Nitrate aerosol formation and source assessment in winter at different regions in Northeast China
	Zhao Z.-Y.; Cao F.; Fan M.-Y.; Zhai X.-Y.; Yu H.-R.; Hong Y.; Ma Y.-J.; Zhang Y.-L.
发表日期	2021
ISSN	1352-2310
卷号	267
英文摘要	To fully identify the formation and source characteristics of aerosol nitrate during winter which accompanied by frequent haze in Northeast China, the nitrate concentrations, δ15N–NO3- and δ18O–NO3- characteristics of PM2.5 samples from four sites of different types including the (a) urban area, (b) suburban area, (c) suburban-rural transition area and (d) rural area in Northeast China were analyzed in this work. δ15N isotope fractionation (εN) during the conversion of atmospheric NOX (δ15N-NOX) to nitrate (δ15N–NO3-) was discussed on the basis of the estimated contributions of the gas phase oxidation pathway of OH radical (·OH) (γOH) and the heterogeneous hydrolysis pathway of N2O5 (γN2O5) to nitrate formation. Besides, the contribution of biological soil, coal combustion, biomass burning and motor vehicles to NOX emissions had also been analyzed using Bayesian isotope mixing model. Results showed that different types of sites had inconsistent source contributions. Obviously, coal combustion plays an absolutely indispensable role in the production of NOX in all the sites, especially in rural areas (d), where coal combustion contributed up to 89.8%. In addition, biomass burning still has a great effect on NOX emissions in the Northeast, showing a contribution of 5.2%–35.8%. It is worth noting that in urban site (a) where the tropospheric O3 concentration (34±9 μg m−3) was significantly lower than the other regions ((b): 54 ± 16 μg m−3, (c): 101 ± 21 μg m−3, (d): 98 ± 17 μg m−3), the contribution of the ·OH pathway to nitrate was as high as 69.4%, which was very different from the other three sites. The different formation mechanisms of nitrate in urban and non-urban may be due to different O3. Haze not only affects the sources of nitrate, but also changes the contribution of nitrate formation. Except for rural site (d), the contribution of the heterogeneous reaction (N2O5 pathway) of the other three sites during the haze period was greater (a: 35.1%, b: 60.0%, c: 59.0%, d: 60.8%) than in the non-haze period (a: 22.5%, b: 44.7%, c: 41.9%, d: 64.2%). © 2021 Elsevier Ltd
关键词	Different type of regions Nitrate PM2.5 Sources and formations Winter
语种	英语
scopus关键词	Aerosols; Coal; Coal combustion; Free radicals; Gases; Isotopes; Nitrogen oxides; Rural areas; Urban growth; Aerosol formation; Aerosol source; Biomass-burning; Different type of region; Nitrate aerosols; Northeast China; PM 2.5; Source and formation; Source assessment; Winter; Nitrates; coal; isotope; nitrate; nitrogen 15; oxygen; aerosol formation; biomass burning; coal combustion; nitrate; rural area; source apportionment; urban site; winter; aerosol; air pollution indicator; air quality; air sampling; airflow; Article; biomass; China; clinical article; combustion; controlled study; exhaust gas; fractionation; haze; human; hydrolysis; oxidation kinetics; relative humidity; rural area; soil; solar radiation; suburban area; traffic pollution; urban area; winter; China
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248175
作者单位	Yale–NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science and Technology, Nanjing, 210044, China; Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science and Technology, Nanjing, 210044, China; Jiangsu Provincial Key Laboratory of Agricultural Meteorology, College of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Shenyang Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, 110016, China
推荐引用方式 GB/T 7714	Zhao Z.-Y.,Cao F.,Fan M.-Y.,et al. Nitrate aerosol formation and source assessment in winter at different regions in Northeast China[J],2021,267.
APA	Zhao Z.-Y..,Cao F..,Fan M.-Y..,Zhai X.-Y..,Yu H.-R..,...&Zhang Y.-L..(2021).Nitrate aerosol formation and source assessment in winter at different regions in Northeast China.ATMOSPHERIC ENVIRONMENT,267.
MLA	Zhao Z.-Y.,et al."Nitrate aerosol formation and source assessment in winter at different regions in Northeast China".ATMOSPHERIC ENVIRONMENT 267(2021).