DOI: 10.1016/j.atmosenv.2018.01.031
Scopus记录号: 2-s2.0-85041491629
论文题名: Seasonal atmospheric deposition and air–sea gas exchange of polycyclic aromatic hydrocarbons over the Yangtze River Estuary, East China Sea: Implications for source–sink processes
作者: Jiang Y ; , Lin T ; , Wu Z ; , Li Y ; , Li Z ; , Guo Z ; , Yao X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 178 起始页码: 31
结束页码: 40
语种: 英语
英文关键词: Air–sea gas exchange
; Dry deposition
; PAHs
; Source–sink process
; Wet deposition
; Yangtze River Estuary
Scopus关键词: Aromatic compounds
; Aromatic hydrocarbons
; Deposition
; Gases
; Hydrocarbons
; Meteorological problems
; Phase interfaces
; Rivers
; Seawater
; Wind
; Atmospheric depositions
; Dry deposition
; East Asian winter monsoon
; Gas exchange
; Mass-balance estimation
; Polycyclic aromatic hydrocarbons (PAHS)
; Wet deposition
; Yangtze River estuary
; Polycyclic aromatic hydrocarbons
; polycyclic aromatic hydrocarbon
; sea water
; air
; Article
; atmospheric deposition
; China
; dry deposition
; estuary
; gas
; gas exchange
; molecular weight
; priority journal
; river
; sea
; seasonal variation
; sediment
; source sink relationship
; summer
; temperature sensitivity
; volatilization
; wet deposition
; wind
; winter
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: In this work, air samples and surface seawater samples covering four seasons from March 2014 to January 2015 were collected from a background receptor site in the YRE to explore the seasonal fluxes of air–sea gas exchange and dry and wet deposition of 15 polycyclic aromatic hydrocarbons (PAHs) and their source–sink processes at the air–sea interface. The average dry and wet deposition fluxes of 15 PAHs were estimated as 879 ± 1393 ng m−2 d−1 and 755 ± 545 ng m−2 d−1, respectively. Gaseous PAH release from seawater to the atmosphere averaged 3114 ± 1999 ng m−2 d−1 in a year round. The air–sea gas exchange of PAHs was the dominant process at the air–sea interface in the YRE as the magnitude of volatilization flux of PAHs exceeded that of total dry and wet deposition. The gas PAH exchange flux was dominated by three-ring PAHs, with the highest value in summer and lowest in winter, indicating a marked seasonal variation owing to differences in Henry's law constants associated with temperature, as well as wind speed and gaseous-dissolved gradient among seasons. Based on the simplified mass balance estimation, a net 11 tons y−1 of PAHs (mainly three-ring PAHs) were volatilized from seawater to the atmosphere in a ∼20,000 km2 area in the YRE. Other than the year-round Yangtze River input and ocean ship emissions, the selective release of low-molecular-weight PAHs from bottom sediments in winter due to resuspension triggered by the East Asian winter monsoon is another potential source of PAHs. This work suggests that the source–sink processes of PAHs at the air–sea interface in the YRE play a crucial role in regional cycling of PAHs. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82941
Appears in Collections: 气候变化事实与影响
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作者单位: Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Institute of Atmospheric Sciences, Department of Environmental Science and Engineering, Fudan University, Shanghai, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China; College of Environmental Science & Engineering, Ocean University of China, Qingdao, China
Recommended Citation:
Jiang Y,, Lin T,, Wu Z,et al. Seasonal atmospheric deposition and air–sea gas exchange of polycyclic aromatic hydrocarbons over the Yangtze River Estuary, East China Sea: Implications for source–sink processes[J]. Atmospheric Environment,2018-01-01,178