DOI: 10.1016/j.atmosenv.2015.07.007
Scopus记录号: 2-s2.0-84939194765
论文题名: Variability and potential sources of summer PM<inf>2.5</inf> in the Northeastern United States
作者: Saunders R ; O ; , Waugh D ; W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 117 起始页码: 259
结束页码: 270
语种: 英语
英文关键词: Air pollution
; Fine aerosol
; MERRA
; Transport
; Variability
; Wildfires
Scopus关键词: Aerosols
; Air pollution
; Atmospheric aerosols
; Carbon
; Fires
; Industrial emissions
; Organic carbon
; Pollution
; Fine aerosols
; MERRA
; Transport
; Variability
; Wildfires
; Atmospheric movements
; ammonium sulfate
; organic carbon
; advection
; aerosol
; ammonium
; anthropogenic source
; atmospheric pollution
; boreal forest
; concentration (composition)
; ground-based measurement
; high pressure system
; industrial emission
; long range transport
; optical depth
; organic carbon
; pollutant source
; pollutant transport
; smoke
; spatiotemporal analysis
; sulfate
; summer
; suspended particulate matter
; wildfire
; aerosol
; air pollutant
; air pollution
; air quality
; air sampling
; Article
; biomass
; carbon footprint
; optical depth
; pollution transport
; priority journal
; seasonal variation
; summer
; suspended particulate matter
; United States
; Midwest
; United States
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: The variability of ground-level concentrations of fine suspended particulate matter (PM2.5 ) in the Northeastern United States is examined using observed PM2.5 from multiple data networks together with output from the Modern-Era Retrospective Analysis for Research and Applications Aerosol Reanalysis (MERRAero). The long-term variations as well as the occurrence of short-term high-concentration episodes in the region are investigated for the period 1999-2013. This analysis shows that over this period there has been a significant decrease in summer-mean PM2.5 . A decrease in the occurrence and magnitude of high-PM2.5 events in the Northeastern U.S. region is also observed. The potential sources of PM2.5 are analyzed using MERRAero aerosol optical depth for two of the main components of the pollutant: organic carbon and ammonium sulfate. The analysis indicates that high-PM2.5 events in the Northeastern U.S. are, generally, the result of long range transport of smoke from large boreal wildfires, Midwestern industrial emissions, or a combination of both. There are roughly equal numbers of events due to natural or anthropogenic sources for the 2002-2012 period for this region. The events that have an anthropogenic source are characterized by a strong high pressure system in the Southern U.S. that cause aerosols to be advected from the Midwest into the Northeastern U.S. The meteorology related to wildfire events is more variable, consistent with the varied locations of the fires that cause aerosol events in the Northeastern U.S. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81597
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, MD, United States
Recommended Citation:
Saunders R,O,, Waugh D,et al. Variability and potential sources of summer PM<inf>2.5</inf> in the Northeastern United States[J]. Atmospheric Environment,2015-01-01,117