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Contrasting sources and processes of particulate species in haze days with low and high relative humidity in wintertime Beijing
Huang, Ru Jin1,2; He, Yao1; Duan, Jing1; Li, Yongjie3; Chen, Qi4; Zheng, Yan4; Chen, Yang5; Hu, Weiwei6; Lin, Chunshui1; Ni, Haiyan1; Dai, Wenting1; Cao, Junji1; Wu, Yunfei7; Zhang, Renjian7; Xu, Wei1,8; Ovadnevaite, Jurgita8; Ceburnis, Darius8; Hoffmann, Thorsten9; D. ODowd, Colin8
2020-07-17
Source PublicationAtmospheric Chemistry and Physics
ISSN1680-7316
Volume20Issue:14Pages:9101-9114
Abstract

Although there are many studies of particulate matter (PM) pollution in Beijing, the sources and processes of secondary PM species during haze periods remain unclear. Limited studies have investigated the PM formation in highly polluted environments under low- and high-relative-humidity (RH) conditions. Herein, we present a systematic comparison of species in submicron particles (PM1) in wintertime Beijing (29 December 2014 to 28 February 2015) for clean periods and pollution periods under low- and high-RH conditions. PM1 species were measured with an aerosol chemical pecies monitor (ACSM) and an Aethalometer. Sources and processes for organic aerosol (OA) were resolved by positive matrix factorization (PMF) with a multilinear engine 2 (ME-2). The comparisons for clean, low-RH pollution and high-RH pollution periods are made from three different aspects, namely (a) mass concentration, (b) mass fraction and (c) growth rate in diurnal profiles. OA is the dominant component of PM1, with an average mass concentration of 56.7 ugm3 (46 ) during high-RH pollution and 67.7 ugm3 (54 ) during low-RH pollution periods. Sulfate had higher concentration and mass fraction during high-RH pollution periods, while nitrate had higher concentration and mass fraction during low-RH pollution periods. The diurnal variations of nitrate and oxygenated organic aerosol (OOA) showed a daytime increase in their concentrations during all three types of periods. Nitrate had similar growth rates during low-RH (0.40 ugm3 h1) and high-RH (0.55 ugm3 h1) pollution periods. OOA had a higher growth rate during low- RH pollution periods (1.0 ugm3 h1) than during high-RH pollution periods (0.40 ugm3 h1). In contrast, sulfate had a decreasing trend during low-RH pollution periods, while it increased significantly with a growth rate of 0.81 ugm3 h1 during high-RH pollution periods. These distinctions in mass concentrations, mass fractions and daytime growth rates may be explained by the difference in the formation processes affected by meteorological conditions. In particular, photochemical oxidation and aqueous-phase processes may both produce sulfate and nitrate. The relative importance of the two pathways, however, differs under different meteorological conditions. Additional OOA formation under high- RH (> 70 ) conditions suggests aqueous-related formation pathways. This study provides a general picture of the haze formation in Beijing under different meteorological conditions.

DOI10.5194/acp-20-9101-2020
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS SubjectEnvironmental Sciences ; Meteorology & Atmospheric Sciences
WOS IDWOS:000558639500002
Scopus ID2-s2.0-85089340134
Fulltext Access
FWCI1.9343528
Citation statistics
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorHuang, Ru Jin
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Center for Excellence in Quaternary Science and Global Change, Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth and Environment, Chinese Academy of Sciences, Xian, 710061, China
2.Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266061, China
3.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Taipa, Macao
4.State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
5.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
6.State Key Laboratory of Organic Geochemistry and Guangdong, Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
7.Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
8.School of Physics and Centre for Climate and Air Pollution Studies, Ryan Institute National, University of Ireland Galway, Galway, University Road, H91CF50, Ireland
9.Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University of Mainz, Mainz, Düesbergweg 10-14, 55128, Germany
Recommended Citation
GB/T 7714
Huang, Ru Jin,He, Yao,Duan, Jing,et al. Contrasting sources and processes of particulate species in haze days with low and high relative humidity in wintertime Beijing[J]. Atmospheric Chemistry and Physics,2020,20(14):9101-9114.
APA Huang, Ru Jin,He, Yao,Duan, Jing,Li, Yongjie,Chen, Qi,Zheng, Yan,Chen, Yang,Hu, Weiwei,Lin, Chunshui,Ni, Haiyan,Dai, Wenting,Cao, Junji,Wu, Yunfei,Zhang, Renjian,Xu, Wei,Ovadnevaite, Jurgita,Ceburnis, Darius,Hoffmann, Thorsten,&D. ODowd, Colin.(2020).Contrasting sources and processes of particulate species in haze days with low and high relative humidity in wintertime Beijing.Atmospheric Chemistry and Physics,20(14),9101-9114.
MLA Huang, Ru Jin,et al."Contrasting sources and processes of particulate species in haze days with low and high relative humidity in wintertime Beijing".Atmospheric Chemistry and Physics 20.14(2020):9101-9114.
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