DOI: 10.1016/j.atmosenv.2013.10.016
Scopus记录号: 2-s2.0-84887157357
论文题名: Seasonal and diurnal patterns of speciated atmospheric mercury at a coastal-rural and a coastal-urban site
作者: Cheng I ; , Zhang L ; , Mao H ; , Blanchard P ; , Tordon R ; , Dalziel J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 82 起始页码: 193
结束页码: 205
语种: 英语
英文关键词: Ambient concentration
; Atmospheric mercury
; Coastal locations
; Marine airflows
; Trajectory analysis
Scopus关键词: Ambient concentrations
; Atmospheric mercury
; Coastal locations
; Marine airflows
; Trajectory analysis
; Mercury (metal)
; Trajectories
; Urban growth
; mercury
; atmospheric pollution
; boundary layer
; coastal zone
; concentration (composition)
; emission
; mercury (element)
; rural area
; temperature effect
; temporal variation
; trajectory
; urban area
; air monitoring
; airflow
; article
; atmospheric deposition
; boundary layer
; Canada
; circadian rhythm
; concentration (parameters)
; controlled study
; night
; priority journal
; rural area
; sea
; seashore
; season
; seasonal variation
; spring
; urban area
; wind
; winter
; Canada
; Nova Scotia
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: Gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particle-bound mercury (PBM) were monitored at a coastal-rural and a coastal-urban site in Nova Scotia, Canada from 2010 to 2011. The three-hour average urban concentrations were 1.67±1.01ngm-3, 2.1±3.4pgm-3 and 2.3±3.1pgm-3 for GEM, GOM and PBM, respectively. The rural site concentrations were 1.38±0.20ngm-3, 0.4±1.0pgm-3 and 3.5±4.5pgm-3, respectively. GEM and GOM concentrations were higher at the urban site in all seasons, while PBM was higher at the rural site in winter. Both sites observed higher GEM and PBM during colder seasons and higher GOM in spring. Seasonal diurnal patterns showed daytime increases and nighttime decreases in GEM, GOM, and PBM. Rural-urban site differences may be attributed to the urban heat island effect resulting in warmer nighttime temperatures and higher GEM concentrations, urban GEM emissions, and enhanced deposition in forested areas leading to faster rural GEM decreases. Wind speeds ≥4 and ≥8kmh-1 were associated with higher rural GEM and lower PBM at night, which could be due to downward mixing from the residual boundary layer and marine airflows from the open ocean as modeled by back trajectories. The back trajectory analysis also found higher rural GEM and lower PBM overnight at both sites for open ocean airflows than all airflow conditions, suggesting the ocean is a source of GEM but not PBM. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80915
Appears in Collections: 气候变化事实与影响
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作者单位: 5785 Yonge Street, Toronto, ON M2M 4J2, Canada; Air Quality Research Division, Science and Technology Branch, Environment Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada; Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, United States; Air Quality Sciences Section, Meteorological Service of Canada, Environment Canada, 45 Alderney Drive, Dartmouth, NS B2Y 2N6, Canada
Recommended Citation:
Cheng I,, Zhang L,, Mao H,et al. Seasonal and diurnal patterns of speciated atmospheric mercury at a coastal-rural and a coastal-urban site[J]. Atmospheric Environment,2014-01-01,82