| Mitigating NOX emissions does not help alleviate wintertime particulate pollution in Beijing-Tianjin-Hebei, China | |
| Li, Xia1,2; Bei, Naifang3; Hu, Bo4; Wu, Jiarui1; Pan, Yuepeng4; Wen, Tianxue4; Liu, Zirui4; Liu, Lang1; Wang, Ruonan1; Li, Guohui1,5 | |
| Corresponding Author | Li, Guohui(ligh@ieecas.cn) |
| 2021-06-15 | |
| Source Publication | ENVIRONMENTAL POLLUTION
 |
| ISSN | 0269-7491 |
| Volume | 279Pages:10 |
| Abstract | Stringent mitigation measures have reduced wintertime fine particulate matter (PM2.5) concentrations by 42.2% from 2013 to 2018 in the Beijing-Tianjin-Hebei (BTH) region, but severe PM pollution still frequently engulfs the region. The observed nitrate aerosols have not exhibited a significant decreasing trend and constituted a major fraction (about 20%) of the total PM2.5, although the surface-measured NO2 concentration has decreased by over 20%. The contributions of nitrogen oxides (NOX) emissions mitigation to the nitrate and PM2.5 concentrations and how to alleviate nitrate aerosols efficiently under the current situation still remains elusive. The WRF-Chem model simulations of a persistent and heavy PM pollution episode in January 2019 in the BTH reveal that NOX emissions mitigation does not help lower wintertime nitrate and PM2.5 concentrations under current conditions in the BTH. A 50% reduction in NOX emissions only decreases nitrate mass by 10.3% but increases PM2.5 concentrations by 3.2%, because the substantial O-3 increase induced by NOX mitigation offsets the HNO3 loss and enhances sulfate and secondary organic aerosols formation. Our results are further consolidated by the occurrence of severe PM pollution in the BTH during the COVID-19 outbreak, with a significant reduction in NO2 concentration. Mitigation of NH3 emissions constitutes the priority measure to effectively lower the nitrate and PM2.5 concentrations in the BTH under current conditions, with 35.5% and 12.7% decrease, respectively, when NH3 emissions are reduced by 50%. (c) 2021 Elsevier Ltd. All rights reserved. |
| Keyword | NOX emissions mitigation Particulate matter pollution PM2.5 Nitrate WRF-Chem model Beijing-Tianjin-Hebei region |
| DOI | 10.1016/j.envpol.2021.116931 |
| WOS Keyword | MEXICO-CITY ; ANTHROPOGENIC EMISSIONS ; ATMOSPHERIC AMMONIA ; HIGH-RESOLUTION ; HONO SOURCES ; AIR-QUALITY ; SEVERE HAZE ; HEAVY HAZE ; MODEL ; PHOTOCHEMISTRY |
| Indexed By | SCI ; SCI |
| Language | 英语 |
| Funding Project | Strategic Priority Research Program of Chinese Academy of Sciences[XDB40030203] ; National Key Research & Development Plan[2017YFC0210000] ; National Research Program for Key Issues in Air Pollution Control[DQGG0105] |
| WOS Research Area | Environmental Sciences & Ecology |
| Funding Organization | Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Research & Development Plan ; National Research Program for Key Issues in Air Pollution Control |
| WOS Subject | Environmental Sciences |
| WOS ID | WOS:000647790400016 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ieecas.cn/handle/361006/16501 |
| Collection | 粉尘与环境研究室 第四纪科学与全球变化卓越创新中心 |
| Corresponding Author | Li, Guohui |
| Affiliation | 1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, SKLLQG, Xian 710061, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China 4.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 5.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Xia,Bei, Naifang,Hu, Bo,et al. Mitigating NOX emissions does not help alleviate wintertime particulate pollution in Beijing-Tianjin-Hebei, China[J]. ENVIRONMENTAL POLLUTION,2021,279:10. |
| APA | Li, Xia.,Bei, Naifang.,Hu, Bo.,Wu, Jiarui.,Pan, Yuepeng.,...&Li, Guohui.(2021).Mitigating NOX emissions does not help alleviate wintertime particulate pollution in Beijing-Tianjin-Hebei, China.ENVIRONMENTAL POLLUTION,279,10. |
| MLA | Li, Xia,et al."Mitigating NOX emissions does not help alleviate wintertime particulate pollution in Beijing-Tianjin-Hebei, China".ENVIRONMENTAL POLLUTION 279(2021):10. |
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