DOI: 10.1016/j.atmosenv.2013.11.032
Scopus记录号: 2-s2.0-84889635150
论文题名: Enhancement of the hygroscopicity parameter kappa of rural aerosols in northern Taiwan by anthropogenic emissions
作者: Hung H ; -M ; , Lu W ; -J ; , Chen W ; -N ; , Chang C ; -C ; , Chou C ; C ; -K ; , Lin P ; -H
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 84 起始页码: 78
结束页码: 87
语种: 英语
英文关键词: Aerosol
; CCN
; Cloud
; Hygroscopicity
; Refractive index
Scopus关键词: Clouds
; Refractive index
; Rural areas
; Size distribution
; Sulfur dioxide
; Volatile organic compounds
; Anthropogenic contribution
; Anthropogenic emissions
; CCN
; Hygroscopicity
; Number size distribution
; Particle number size distribution
; Physicochemical property
; Scattering co-efficient
; Aerosols
; volatile organic compound
; aerosol formation
; aerosol property
; anthropogenic effect
; cloud condensation nucleus
; hygroscopicity
; nucleation
; oxidation
; physicochemical property
; refractive index
; rural atmosphere
; supersaturation
; absorption
; aerosol
; aging
; air
; article
; oxidation
; particle size
; photooxidation
; priority journal
; rural aerosol
; rural area
; Taiwan
; wettability
; Taiwan
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The hygroscopicity of aerosols in a rural site of northern Taiwan, HuaLin, for August 2011 was derived to investigate the impact of anthropogenic emission on the physico-chemical property of aerosols using the measured particle number size distribution, condensation nuclei (CN) concentration and the number of particles activated at supersaturation (SS) of 0.089-0.91%. Based on the concentration of anthropogenic volatile organic compounds (VOCs) and the back trajectory information, this campaign was divided into two periods: with and without significant anthropogenic contributions as 8/12-8/19/2011(Period_1) and 8/19-8/22/2011(Period_2), respectively. The refractive indices without absorption calculated using the measured scattering coefficients and number size distribution of aerosol particles were 1.43±0.03 for 8/13-8/17 and 1.49±0.03 for 8/18-8/21, having a consistent trend with back trajectory and the selected VOC concentrations. The new particles formation happened more significant for Period_1 and likely to be associated with the higher concentration of anthropogenic emission such as SO2 or VOCs which went through the oxidation or photo-oxidation to form more condensable species for nucleation. The derived single hygroscopicity parameter increases with particle size and was higher for Period_1 (0.1 at 50nm- 0.35 at 165nm) than Period_2 (0.04 at 70nm- 0.28 at 175nm) possibly due to the addition of aged composition as the air parcel passed through cities and went through photo-oxidation processes before arriving HuaLin. However, the hygroscopicity of rural aerosols tends to be higher than the urban aerosol in this study possibly due to the aging level. This study suggests the important role of anthropogenic emission on the secondary aerosol formation and also the physical properties of aerosols over rural area. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81033
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, 10617 Taipei, Taiwan; Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
Recommended Citation:
Hung H,-M,, Lu W,et al. Enhancement of the hygroscopicity parameter kappa of rural aerosols in northern Taiwan by anthropogenic emissions[J]. Atmospheric Environment,2014-01-01,84