IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Influence of relative humidity on aerosol composition: Impactson light extinction and visibility impairment at two sites incoastal area of China
Qu,WJ[1]; Wang,J[2]; Zhang,XY[3]; Wang,D[4]; Sheng,LF[1]
2015-02
Source PublicationAtmospheric Research
Volume153Issue:2015Pages:500-511
Subtype期刊论文
Abstract

Investigation on the aerosol characteristics, surface visibility (Vis) and meteorology at BGS (Baguanshan, Qingdao) and LNA (Lin'an, Zhejiang) shows that the ambient aerosol chemical composition and light extinction are relative humidity (RH) dependent. At higher RH, both the strengthened hygroscopic growth and the more efficient oxidization (of the precursor gases and formation of the secondary sulfate and nitrate) contribute to the increase of the mass fraction of the hygroscopic species, which consequently results in the increase of the aerosol mass extinction efficiency (MEE) and Vis reduction at the two Chinese coastal sites. MEE and chemical composition of the aerosol vary significantly under different regional transport ways; the airmasses from the ocean directions are associated with higher RH, higher sulfate mass fraction and greater MEE at BGS, while MEEs are smaller and associated with lower RH and lower sulfate fraction for the airmasses from the continent directions. Vis shows better correlation with PM2.5 and PM10 mass concentrations when RH effect on aerosol hygroscopic growth is considered. At BGS, the sulfate mass fraction in PM2.5 and PM10 (in average 32.4% and 27.4%) can explain about 60.7% and 74.3% of the variance of the aerosol MEE, respectively; sulfate and nitrate contribute to about 61% of the light extinction. RH plays a key role in aerosol extinction and visibility variation over this coastal area of China. Formation of the secondary aerosol (especially sulfate and nitrate) as well as hygroscopic growth under favorable (more stable and humid) meteorological conditions should be paid adequate attention in regulation of air quality and Vis improvement over eastern China in addition to the routine emission control measurements.

KeywordAtmospheric Aerosol Mass Extinction Efficient Sulfate Fraction Visibility Coastal China
DOI10.1016/j.atmosres.2014.10.009
Indexed BySCI
Language英语
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9476
Collection黄土与第四纪地质国家重点实验室(2010~)
Affiliation1.Physical Oceanography Laboratory, Key Laboratory of Ocean–Atmosphere Interaction and Climate in Universities of Shandong,Ocean University of China, Qingdao 266100, China;
2.Department of Earth and Atmospheric Sciences, University of Nebraska-Lincoln, Lincoln, NE 68588-0340, USA;
3.Key Laboratory for Atmospheric Chemistry, Chinese Academy of Meteorological Sciences, CMA, 46 Zhong Guan Cun S. Ave., Beijing 100081, China;
4.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, 10 Fenghui S. Rd., PO Box 17, XiAn 710075, China
Recommended Citation
GB/T 7714
Qu,WJ[1],Wang,J[2],Zhang,XY[3],et al. Influence of relative humidity on aerosol composition: Impactson light extinction and visibility impairment at two sites incoastal area of China[J]. Atmospheric Research,2015,153(2015):500-511.
APA Qu,WJ[1],Wang,J[2],Zhang,XY[3],Wang,D[4],&Sheng,LF[1].(2015).Influence of relative humidity on aerosol composition: Impactson light extinction and visibility impairment at two sites incoastal area of China.Atmospheric Research,153(2015),500-511.
MLA Qu,WJ[1],et al."Influence of relative humidity on aerosol composition: Impactson light extinction and visibility impairment at two sites incoastal area of China".Atmospheric Research 153.2015(2015):500-511.
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