DOI: 10.1016/j.atmosenv.2017.05.016
Scopus记录号: 2-s2.0-85019733911
论文题名: Estimation of atmospheric aging time of black carbon particles in the polluted atmosphere over central-eastern China using microphysical process analysis in regional chemical transport model
作者: Chen X ; , Wang Z ; , Yu F ; , Pan X ; , Li J ; , Ge B ; , Wang Z ; , Hu M ; , Yang W ; , Chen H
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 163 起始页码: 44
结束页码: 56
语种: 英语
英文关键词: Aging
; Black carbon(BC)
; Microphysics
; NAQPMS+APM
Scopus关键词: Aging of materials
; Air quality
; Atmospheric aerosols
; Atmospheric movements
; Atmospheric radiation
; Chemical analysis
; Condensation
; Hydrophilicity
; Mixing
; Particulate emissions
; People movers
; Photochemical reactions
; Time measurement
; Air quality prediction
; Black carbon
; Microphysics
; NAQPMS+APM
; Regional atmospheric chemistry modeling
; Regional chemical transport model
; Temporal and spatial variation
; Visibility impairment
; Atmospheric chemistry
; black carbon
; aerosol
; aging
; air quality
; atmospheric chemistry
; atmospheric modeling
; atmospheric particle
; atmospheric pollution
; black carbon
; coagulation
; condensation
; estimation method
; mixing
; photochemistry
; regional climate
; spatiotemporal analysis
; surface layer
; aerosol
; air pollution
; air quality
; Article
; atmosphere
; chemistry
; China
; circadian rhythm
; photochemistry
; prediction
; priority journal
; Beijing [China]
; China
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: Mixing state of black carbon (BC) particles has significant impacts on their radiative forcing, visibility impairment and the ability in modifying cloud formation. In this study, an aging scheme of BC particles using prognostic variables based on aerosol microphysics was incorporated into a regional atmospheric chemistry model, Nested Air Quality Prediction Modeling System with Advanced Particle Microphysics (NAQPMS + APM), to investigate the temporal and spatial variations in aging time scale of BC particles in polluted atmosphere over central-eastern China. The model results show that the aging time scale has a clear diurnal variation with a lower value in the daytime and a higher value in the nighttime. The shorter aging time scale in the daytime is due to condensation aging associated with intense photochemical reaction while the longer aging time scale in the nighttime is due to coagulation aging, which is much slower than that due to condensation. In Beijing, the aging time scale is 2 h or less in the surface layer in daytime, which is far below the fixed 1.2 days used in many models. As a result, the fraction of hydrophilic BC particles by the new scheme is larger than that by the scheme with fixed aging time scale though the mean aging time scale by the new scheme is much larger than 1.2 days. Hydrophilic fraction of BC particles increases with the increase of height. Over central-eastern China, the averaged aging time scale calculated by the new scheme is in the range from 12 h to 7 days, with higher values in regions far from the source areas. Hydrophilic fraction of BC particles is more than 90% at the higher levels in polluted atmosphere. Difference of simulated BC concentration with internal mixing and microphysical aging is within 5%, indicating that the assumption of internal mixing for BC particles to respond to in-cloud scavenging is more appropriate than the external mixing assumption in polluted atmosphere over central-eastern China. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82774
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Atmospheric Science Research Center, State University of New York at Albany, New York, United States; State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China
Recommended Citation:
Chen X,, Wang Z,, Yu F,et al. Estimation of atmospheric aging time of black carbon particles in the polluted atmosphere over central-eastern China using microphysical process analysis in regional chemical transport model[J]. Atmospheric Environment,2017-01-01,163