气候变化领域集成服务门户(CCPortal): Optical properties closure and sources of size-resolved aerosol in Nanjing around summer harvest period

CCPortal

DOI	10.1016/j.atmosenv.2020.118017
	Optical properties closure and sources of size-resolved aerosol in Nanjing around summer harvest period
	Yao L.; Kong S.; Zheng H.; Yan Q.; Chen K.; Yin Y.; Yuan L.; Wang Z.; Zhang Y.; Cheng Y.; Wu J.; Zeng X.; Zheng S.; Niu Z.; Fan Z.; Yan Y.; Liu D.; Qi S.
发表日期	2021
ISSN	1352-2310
卷号	244
英文摘要	Aerosol size distribution, chemical components and their mixing state are key factors impacting the optical properties of aerosols. The researches on optical properties closure and sources for size-segregated aerosols are still scattered. A sampling campaign covering a summer harvest period was conducted in Nanjing, considering the influence of open biomass burning (BB) on optical properties of size-resolved aerosol. Two parallel FA-3 samplers were employed to collect nine size-segregated particles (0.43–10 μm), with water-soluble ions, carbonaceous components and elements analyzed. Aerosol light absorption (bap) and scattering (bsp) coefficients were synchronously online monitored. Results indicated that sulfate, nitrate and ammonium (SNA), crustal materials (CM) and organic matter (OM) were the main contributors of aerosol mass, totally accounting for 61.3%–81.4%. On hazy days, PM1.1 occupied 82.3% of the total estimated bsp by Mie model, with SNA and OM accounting for 40.9% and 16.2%, respectively. PM1.1 contributed 61.7% of the total estimated bap with EC accounting for 41.6%. Positive matrix factorization modeling indicated that vehicle emission contributed most (13.1%–52.9%) to bap especially for particles with diameter smaller than 0.43 μm. On hazy days, BB was the main source for bsp, contributing to 24.7% (for particle within 1.1–2.1 μm)-38.2% (0.65–1.1 μm), then followed by secondary inorganic aerosol, contributing to 16.3% (1.1–2.1 μm)-18.8% (0.65–1.1 μm). For the summer harvest period, the open BB impacts obviously on bsp rather than bap, promoting the haze formation. The temporal variations of aerosol externally mixed ratio and significant negative correlations between the mixed ratio and OC/EC also verified that fresh BB emissions deteriorated the visibility. This study highlights the different roles of aerosol chemical components and emission sources impacting optical properties for size-resolved aerosols, which is helpful to give more accurate visibility improvement strategies. © 2020 Elsevier Ltd
关键词	Biomass burning Mie model Optical properties Size-resolved particles Source apportionment
语种	英语
scopus关键词	Factorization; Harvesting; Light absorption; Sulfur compounds; Visibility; Aerosol chemical components; Aerosol light absorption; Aerosol size distributions; Carbonaceous components; Optical properties of aerosols; Positive matrix factorization models; Secondary inorganic aerosol; Visibility improvement; Aerosols; ammonia; ion; nitrate; organic matter; sulfate; aerosol; detection method; optical property; particulate matter; pollutant source; sampler; size distribution; summer; temporal variation; aerosol; Article; atmospheric particulate matter; biomass; chemical composition; China; harvest period; haze; light absorption; measurement accuracy; meteorology; particle size; priority journal; summer; visibility; Nanjing [Jiangsu]
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/248788
作者单位	Department of Environmental Science and Engineering, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; Department of Atmospheric Sciences, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China; Mathematical Institute, Faculty of Science, Leiden University, Leiden, RA 2300, Netherlands; Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou, 310058, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China
推荐引用方式 GB/T 7714	Yao L.,Kong S.,Zheng H.,et al. Optical properties closure and sources of size-resolved aerosol in Nanjing around summer harvest period[J],2021,244.
APA	Yao L..,Kong S..,Zheng H..,Yan Q..,Chen K..,...&Qi S..(2021).Optical properties closure and sources of size-resolved aerosol in Nanjing around summer harvest period.ATMOSPHERIC ENVIRONMENT,244.
MLA	Yao L.,et al."Optical properties closure and sources of size-resolved aerosol in Nanjing around summer harvest period".ATMOSPHERIC ENVIRONMENT 244(2021).