The observation of isotopic compositions of atmospheric nitrate in Shanghai China and its implication for reactive nitrogen chemistry
文献类型：期刊论文
| 作者 | He, Pengzhen1,3,4; Xie, Zhouqing2,3,4,5; Yu, Xiawei3,4; Wang, Longquan3,4; Kang, Hui3,4; Yue, Fange3,4 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2020-04-20 |
| 卷号 | 714 |
| 关键词 | Nitrate formation Nitrogen isotope Oxygen isotope Diurnal variation Atmospheric life PM2.5 |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2020.136727 |
| 通讯作者 | Xie, Zhouqing(zqxie@ustc.edu.cn) |
| 英文摘要 | The occurrence of PM2.5 pollution in China is usually associated with the formation of atmospheric nitrate, the oxidation product of nitrogen oxides (NOx - NO + NO2). The oxygen-17 excess of nitrate (Delta O-17(NO3-)) can be used to reveal the relative importance of nitrate formation pathways and get more insight into reactive nitrogen chemistry. Here we present the observation of isotopic composition of atmospheric nitrate (Delta O-17 and delta N-15) collected from January to June 2016 in Shanghai China Concentrations of atmospheric nitrate ranged from 1.4 to 24.1 mu g m(-1) with the mean values being (7.6 +/- 4.4 (1SD)), (10.2 = 5.8) and (4.1 = 2.4) Kg m(3) in winter, spring and summer respectively. Delta O-17(NO3-) varied from 20.5 parts per thousand to 31.9 parts per thousand with the mean value being (26.9 +/- 2.8)parts per thousand in winter, followed by (26.6 +/- 1.7)parts per thousand in spring and the lowest (232 +/- 1.6)parts per thousand in summer. Delta O-17(NO3-)-constrained estimates suggest that the conversion of NOx to nitrate is dominated by NO2 + OH and/or NO2 + H2O, with the mean possible contribution of 55-77% in total and even higher (84-92%) in summer. A diurnal variation of Delta O-17(NO3-) featured by high values at daytime (28.6 +/- 1.2 parts per thousand) and low values (25.4 +/- 2.8 parts per thousand) at nighttime was observed during our diurnal sampling period. This trend is related to the atmospheric life of nitrate (tau) and calculations indicate tau is around 15 h during the diurnal sampling period. In terms of delta N-15(NO3-), it changed largely in our observation, from -2.9%. to 18.1 parts per thousand with a mean of (6.4 +/- 4.4)parts per thousand. Correlation analysis implies that the combined effect of NOx emission sources and isotopic fractionation processes are responsible for delta N-15(NO3-) variations. Our observations with the aid of model simulation in future study will further improve the understanding of reactive nitrogen chemistry in urban regions. (C) 2020 Elsevier B.V. All rights reserved. |
| WOS关键词 | FOSSIL-FUEL COMBUSTION ; SEASONAL-VARIATION ; FORMATION PATHWAYS ; AEROSOL FORMATION ; 1ST MEASUREMENTS ; EAST ANTARCTICA ; STABLE-ISOTOPES ; NITRYL CHLORIDE ; NOX EMISSIONS ; ACID HONO |
| 资助项目 | National Natural Science Foundation of China[91544103] ; National Natural Science Foundation of China[41676173] ; National Key Project of MOST[2016YFC0203302] ; Key Project of CAS[KJZD-EW-TZ-G06-01] ; Natural Science Foundation of West Anhui University[WGKQ202001007] ; Atmospheric Pollution Control of the Prime Minister[DQGG0104] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000517760200140 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Key Project of MOST ; Key Project of CAS ; Natural Science Foundation of West Anhui University ; Atmospheric Pollution Control of the Prime Minister |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/103547]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xie, Zhouqing |
| 作者单位 | 1.West Anhui Univ, Sch Environm & Tourism, Luan 237012, Anhui, Peoples R China 2.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Anhui, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, Anhui Prov Key Lab Polar Environm & Global Change, Hefei 230026, Anhui, Peoples R China 4.Univ Sci & Technol China, Sch Earth & Space Sci, Inst Polar Environm, Hefei 230026, Anhui, Peoples R China 5.Chinese Acad Sci, Ctr Excellence Urban Atmospher Environm, Inst Urban Environm, Xiamen 361021, Fujian, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Pengzhen,Xie, Zhouqing,Yu, Xiawei,et al. The observation of isotopic compositions of atmospheric nitrate in Shanghai China and its implication for reactive nitrogen chemistry[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,714. |
| APA | He, Pengzhen,Xie, Zhouqing,Yu, Xiawei,Wang, Longquan,Kang, Hui,&Yue, Fange.(2020).The observation of isotopic compositions of atmospheric nitrate in Shanghai China and its implication for reactive nitrogen chemistry.SCIENCE OF THE TOTAL ENVIRONMENT,714. |
| MLA | He, Pengzhen,et al."The observation of isotopic compositions of atmospheric nitrate in Shanghai China and its implication for reactive nitrogen chemistry".SCIENCE OF THE TOTAL ENVIRONMENT 714(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
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