DOI: 10.1002/jgrd.50473
论文题名: Deposition of polycyclic aromatic hydrocarbons in the North Pacific and the Arctic
作者: Ma Y. ; Xie Z. ; Yang H. ; Möller A. ; Halsall C. ; Cai M. ; Sturm R. ; Ebinghaus R.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 11 起始页码: 5822
结束页码: 5829
语种: 英语
英文关键词: air-sea exchange
; Arctic
; North Pacific
; PAHs
Scopus关键词: Coal combustion
; Deforestation
; Meteorological problems
; Polycyclic aromatic hydrocarbons
; Seawater
; Surface waters
; Air-sea exchange
; Arctic
; Atmospheric concentration
; Atmospheric depositions
; Dry deposition fluxes
; North Pacific
; PAHs
; Polycyclic aromatic hydrocarbons (PAHS)
; Deposition
; air-sea interaction
; atmospheric deposition
; boundary layer
; concentration (composition)
; marine atmosphere
; PAH
; seawater
; surface water
; Arctic Ocean
; Far East
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Eighteen polycyclic aromatic hydrocarbons (PAHs) were simultaneously measured in surface seawater and boundary layer air from the North Pacific toward the Arctic Ocean during the Fourth Chinese National Arctic Research Expedition in the summer of 2010. Atmospheric Σ18 PAH ranged from 910 to 7400 pg m-3, with the highest concentrations observed in the coastal regions of East Asia. Correlations of PAHs' partial pressures versus inverse temperature were not significant, indicating the importance of ongoing primary sources on ambient PAH levels in the remote marine atmosphere. The relatively high atmospheric concentrations observed in the most northerly latitudes of the Arctic Ocean suggest the influence of regional sources. For example, higher levels of particle-bound PAHs were observed in the air of the Arctic Ocean than the North Pacific, indicating forest fire and/or within-Arctic sources. Concentrations of PAHs in surface seawater were within a range of 14-760 pg L-1 and generally decreased with increasing latitude. The observed air-sea gas exchange gradients strongly favored net deposition of PAHs along the entire cruise, with increasing deposition with increasing latitude, while the particle-bound dry deposition fluxes (particularly for the high molecular weight PAH) were highest at sample sites close to East Asia. Based on characteristic PAH ratios, atmospheric PAHs originated from the combustion of biomass or coal, while the ratios observed in seawater reflected a mixture of sources. Given the dominance of primary emissions to the atmosphere and the relatively fast removal of PAHs from the water column, then PAHs will continue to load into the surface waters of the remote marine environment via atmospheric deposition. © 2013. American Geophysical Union. All Rights Reserved. 资助项目: 40776003
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63661
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, China; SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai, China; Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research GmbH, Institute of Coastal Research, Max-Planck Straße 1, DE-21502 Geesthacht, Germany
Recommended Citation:
Ma Y.,Xie Z.,Yang H.,et al. Deposition of polycyclic aromatic hydrocarbons in the North Pacific and the Arctic[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(11)