DOI: 10.1016/j.atmosenv.2014.05.081
Scopus记录号: 2-s2.0-84905390935
论文题名: Modeling global persistent organic chemicals in clouds
作者: Mao X ; , Gao H ; , Huang T ; , Zhang L ; , Ma J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 96 起始页码: 345
结束页码: 352
语种: 英语
英文关键词: Atmospheric partition
; Clouds
; Long-range atmospheric transport
; Persistent organic chemicals
Scopus关键词: Atmospheric movements
; Atmospheric temperature
; Clouds
; Industrial chemicals
; Liquids
; Organic chemicals
; Polychlorinated biphenyls
; Atmospheric transport model
; Cloud liquid waters
; Gas-phase concentration
; Global distribution
; Hexachlorocyclohexanes
; Long-range atmospheric transports
; Northern Hemispheres
; Partitioning coefficients
; Organic pollutants
; alpha hexachlorocyclohexane
; polychlorinated biphenyl 138
; polychlorinated biphenyl 28
; polychlorinated biphenyl derivative
; unclassified drug
; atmospheric transport
; cloud microphysics
; estimation method
; global change
; Northern Hemisphere
; seasonal variation
; simulation
; sorption
; water content
; air temperature
; aqueous solution
; article
; atmospheric moisture
; atmospheric pressure
; atmospheric transport
; autumn
; cloud
; concentration (parameters)
; hydrophilicity
; hydrophobicity
; Northern Hemisphere
; partition coefficient
; phase partitioning
; priority journal
; seasonal variation
; solubility
; spring
; summer
; water content
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: A cloud model was implemented in a global atmospheric transport model to simulate cloud liquid water content and quantify the influence of clouds on gas/aqueous phase partitioning of persistent organic chemicals (POCs). Partitioning fractions of gas/aqueous and particle phases in clouds for three POCs α-hexachlorocyclohexane (α-HCH), polychlorinated biphenyl-28 (PCB-28), and PCB-138 in a cloudy atmosphere were estimated. Results show that the partition fraction of these selected chemicals depend on cloud liquid water content (LWC) and air temperature. We calculated global distribution of water droplet/ice particle-air partitioning coefficients of the three chemicals in clouds. The partition fractions at selected model grids in the Northern Hemisphere show that α-HCH, a hydrophilic chemical, is sorbed strongly onto cloud water droplets. The computed partition fractions at four selected model grids show that α-HCH tends to be sorbed onto clouds over land (source region) from summer to early fall, and over ocean from late spring to early fall. 20-60% of α-HCH is able to be sorbed to cloud waters over mid-latitude oceans during summer days. PCB-138, one of hydrophobic POCs, on the other hand, tends to be sorbed to particles in the atmosphere subject to air temperature. We also show that, on seasonal or annual average, 10-20% of averaged PCB-28 over the Northern Hemisphere could be sorbed onto clouds, leading to reduction of its gas-phase concentration in the atmosphere. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80805
Appears in Collections: 气候变化事实与影响
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作者单位: College of Earth and Environmental Sciences, Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, 222 South Tianshui Road, Lanzhou, China; Lamu Environment, 41 Mountfield Crescent, Thornhill, ON L4J 7E9, Canada
Recommended Citation:
Mao X,, Gao H,, Huang T,et al. Modeling global persistent organic chemicals in clouds[J]. Atmospheric Environment,2014-01-01,96