DOI: 10.1016/j.atmosenv.2015.02.050
Scopus记录号: 2-s2.0-84923638830
论文题名: Dry deposition of PM2.5 sulfate above a hilly forest using relaxed eddy accumulation
作者: Matsuda K ; , Watanabe I ; , Mizukami K ; , Ban S ; , Takahashi A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 107 起始页码: 255
结束页码: 261
语种: 英语
英文关键词: Aerosol
; Complex terrain
; Deposition velocity
; EANET
; REA
Scopus关键词: Aerosols
; Air pollution
; Forestry
; Landforms
; Meteorological problems
; Sulfur compounds
; Velocity
; Aerodynamic resistance
; Atmospheric depositions
; Complex terrains
; Deposition velocities
; EANET
; REA
; Relaxed Eddy accumulation
; Relaxed eddy accumulations
; Deposition
; sulfate
; aerodynamics
; aerosol
; atmospheric deposition
; atmospheric pollution
; complex terrain
; deposition velocity
; dry deposition
; eddy
; montane forest
; particulate matter
; sulfate
; wind direction
; aerosol
; analytic method
; Article
; autumn
; controlled study
; dry deposition
; forest
; Japan
; particulate matter
; priority journal
; relaxed eddy accumulation method
; suburban area
; summer
; surface property
; velocity
; wind
; Aerodynamics
; Aerosols
; Air Pollution
; Deposition
; Far East
; Sulfur Compounds
; Honshu
; Japan
; Kanto
; Tama
; Tokyo [Kanto]
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: Sulfur compounds continue to be an important component of atmospheric deposition in East Asia. In order to better understand the dry deposition of PM2.5 sulfate, which is one of the most significant transboundary air pollutants in this region, we measured the dry deposition flux of PM2.5 sulfate above a hilly forest of the Field Museum Tamakyuryo (FM Tama) site in suburban Tokyo. We used the relaxed eddy accumulation (REA) method and took measurements during the summer, from 26 July to 2 August 2013, and the autumn, from 18 to 22 November 2013. We primarily focused on the evaluation of dry deposition above a forest on complex terrain. The total flux and 80% of the runs showed downward flux. The deposition velocities measured by the REA method during times when the wind direction was from a relatively uniform sloping surface over the forest were more reasonable than those measured when the wind direction was from a more complex surface. Using a resistance model that includes the effect of growth of hygroscopic aerosols, we inferred the deposition velocities during two experimental periods. When the fluxes were averaged for a long time (i.e., about 2 weeks) the inferred fluxes and deposition velocities were in reasonable agreement with the measurements. Although averages over long periods showed good agreement, the measured deposition velocities were distributed in a wider range than those inferred by the model. An increased range of deposition velocities was associated with flux footprints from complex terrain. It is possible that the agreements between measured and inferred fluxes or deposition velocities at the site are because the depositions of sulfate are largely controlled by surface factors rather than aerodynamic resistance. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81865
Appears in Collections: 气候变化事实与影响
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作者单位: Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo, Japan; Japan Environmental Sanitation Center, 10-6 Yotsuyakami-cho, Kawasaki, Japan; Central Research Institute of Electric Power Industry, 1646 Abiko, Chiba, Japan
Recommended Citation:
Matsuda K,, Watanabe I,, Mizukami K,et al. Dry deposition of PM2.5 sulfate above a hilly forest using relaxed eddy accumulation[J]. Atmospheric Environment,2015-01-01,107