Molecular characteristics and diurnal variations of organic aerosols at a rural site in the North China Plain with implications for the influence of regional biomass burning

doi:10.5194/acp-19-10481-2019

IEECAS OpenIR > 粉尘与环境研究室

	Molecular characteristics and diurnal variations of organic aerosols at a rural site in the North China Plain with implications for the influence of regional biomass burning
	Li, Jianjun 1,2; Wang, Gehui 1,3,4; Zhang, Qi 2; Li, Jin 1; Wu, Can 3; Jiang, Wenqing 2; Zhu, Tong 5,6; Zeng, Limin 5,6
通讯作者	Wang, Gehui(ghwang@geo.ecnu.edu.cn) ; Zhang, Qi(dkwzhang@ucdavis.edu)
	2019-08-21
发表期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
卷号	19 期号:16 页码:10481-10496
摘要	Field burning of crop residue in early summer releases a large amount of pollutants into the atmosphere with significant impacts on the air quality and aerosol properties in the North China Plain (NCP). In order to investigate the influence of this regional anthropogenic activity on molecular characteristics of organic aerosols, PM2.5 filter samples were collected with a 3 h interval at a rural site of NCP from 10 to 25 June 2013 and analyzed for more than 100 organic tracer compounds, including both primary (n-alkanes, fatty acids/alcohols, sugar compounds, polycyclic aromatic hydrocarbons, hopanes, and phthalate esters) and secondary organic aerosol (SOA) tracers (phthalic acids, isoprene-, alpha-/beta-pinene, beta-caryophyllene, and toluene-derived products), as well as organic carbon (OC), elemental carbon (EC), and water-soluble organic carbon (WSOC). Total concentrations of the measured organics ranged from 177 to 6248 ng m(-3) (mean 1806 +/- 1308 ng m(-3)) during the study period, most of which were contributed by sugar compounds, followed by fatty acids and fatty alcohols. Levoglucosan (240 +/- 288 ng m(-3)) was the most abundant single compound and strongly correlated with OC and WSOC, suggesting that biomass burning (BB) is an important source of summertime organic aerosols in this rural region. Based on the analysis of fire spots and backward trajectories of air masses, two representative periods were classified, which are (1) Period 1 (P1), 13 June 21:00-16 June at 15:00 CST China Standard Time), when air masses were uniformly distributed from the southeast part of NCP, where intensive open-field biomass burning occurred; and (2) Period 2 (P2), 22 June at 12:00 to 24 June at 06:00 CST, which is representative of local emission. Nearly all the measured PM components showed much higher concentrations in P1 than in P2. Although n-alkanes, fatty acids, and fatty alcohols presented similar temporal-diurnal variations as those of levoglucosan throughout the entire period, their molecular distributions were more dominated by high molecular weight (HMW) compounds in P1, demonstrating an enhanced contribution from BB emissions. In contrast, intensive BB emission in P1 seems to have limited influence on the concentrations of polycyclic aromatic hydrocarbons (PAHs), hopanes, and phthalate esters. Both 3-hydroxyglutaric acid and beta-caryophyllinic acid showed strong linearly correlations with levoglucosan (R-2 = 0.72 and 0.80, respectively), indicating that BB is also an important source for terpene-derived SOA formation. A tracer-based method was used to estimate the distributions of biomass-burning OC, fungal-spore OC, and secondary organic carbon (SOC) derived from isoprene, alpha-/beta-pinene, beta-caryophyllene, and toluene in the different periods. The results showed that the contribution of biomassburning OC to total OC in P1 (27.6 %) was 1.7 times that in P2 (17.1 %). However, the contribution of SOC from oxidation of the four kinds of volatile organic compounds (VOCs) increased slightly from 16.3 % in P1 to 21.1 % in P2.
DOI	10.5194/acp-19-10481-2019
关键词[WOS]	ATMOSPHERIC AEROSOLS ; AGRICULTURAL BIOMASS ; PARTICULATE MATTER ; TRACERS ; EMISSIONS ; ACIDS ; PHOTOOXIDATION ; POLLUTION ; EVOLUTION ; SMOKE
收录类别	SCI ; SCI
语种	英语
资助项目	National Nature Science Foundation of China[41773117] ; National Nature Science Foundation of China[91543116] ; National Nature Science Foundation of China[41405122]
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
项目资助者	National Nature Science Foundation of China
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000482004300001
出版者	COPERNICUS GESELLSCHAFT MBH
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13617
专题	粉尘与环境研究室
通讯作者	Wang, Gehui; Zhang, Qi
作者单位	1.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Key Lab Aerosol Chem & Phys, Xian, Shaanxi, Peoples R China 2.Univ Calif Davis, Dept Environm Toxicol, Davis, CA 95616 USA 3.East China Normal Univ, Sch Geog Sci, Minist Educ, Key Lab Geog Informat Sci, Shanghai, Peoples R China 4.Inst Ecochongming, 3663 N Zhongshan Rd, Shanghai, Peoples R China 5.Peking Univ, Coll Environm Sci & Engn, BIC ESAT, Beijing, Peoples R China 6.Peking Univ, Coll Environm Sci & Engn, SKL ESPC, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Li, Jianjun,Wang, Gehui,Zhang, Qi,et al. Molecular characteristics and diurnal variations of organic aerosols at a rural site in the North China Plain with implications for the influence of regional biomass burning[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(16):10481-10496.
APA	Li, Jianjun.,Wang, Gehui.,Zhang, Qi.,Li, Jin.,Wu, Can.,...&Zeng, Limin.(2019).Molecular characteristics and diurnal variations of organic aerosols at a rural site in the North China Plain with implications for the influence of regional biomass burning.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(16),10481-10496.
MLA	Li, Jianjun,et al."Molecular characteristics and diurnal variations of organic aerosols at a rural site in the North China Plain with implications for the influence of regional biomass burning".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.16(2019):10481-10496.