DOI: 10.1016/j.atmosenv.2013.11.033
Scopus记录号: 2-s2.0-84890599032
论文题名: Estimates of background surface ozone concentrations in the United States based on model-derived source apportionment
作者: Lefohn A ; S ; , Emery C ; , Shadwick D ; , Wernli H ; , Jung J ; , Oltmans S ; J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 84 起始页码: 275
结束页码: 288
语种: 英语
英文关键词: Background ozone
; CAMx
; Emissions-Influenced Background
; Photochemical modeling
; Source apportionment
; Stratosphere-to-troposphere transport
; Surface ozone
; Trajectory modeling
Scopus关键词: Atmospheric movements
; Chemical analysis
; Ozone
; Troposphere
; Background ozones
; CAMx
; Emissions-Influenced Background
; Photochemical modeling
; Source apportionment
; Stratosphere-to-troposphere transports
; Surface ozone
; Trajectory modeling
; Urban growth
; ozone
; anthropogenic source
; atmospheric modeling
; atmospheric transport
; background level
; biogenic emission
; concentration (composition)
; elevation
; fire
; lightning
; ozone
; photochemistry
; stratosphere-troposphere interaction
; air analysis
; air pollution
; article
; chemical interaction
; combustion
; concentration (parameters)
; falling
; lightning
; North America
; ozone layer
; priority journal
; rural area
; seasonal variation
; spring
; stratosphere
; summer
; troposphere
; United States
; urban area
; winter
; 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: We analyze background surface ozone (O3) concentrations as estimated by coupled GEOS-Chem/CAMx models for 23 monitoring sites across the US at high- and low-elevation, rural and urban locations during 2006. Specifically, we consider hourly contributions from global tropospheric O3 entering North America, stratospheric O3 over North America, and natural O3 formed from continental biogenic, fire, and lightning sources according to CAMx source apportionment calculations. Unlike historical modeled background definitions that reflect the absence of anthropogenic emissions, we define "Emissions-Influenced Background" (EIB), which includes chemical interactions with anthropogenic emissions and thus reflects "current" background levels at the sites analyzed. We further define global background O3 (GBO3) as the sum of the global tropospheric and stratospheric components and find that higher modeled GBO3 occurs during the spring at sites across the US. At many of the sites during the spring, fall, and winter months higher GBO3 is associated with more frequent stratosphere-to-troposphere transport to the surface (STT-S) events according to independent three-dimensional trajectories based on global meteorological analyses. Patterns of higher spring EIB O3 are followed by lower values during the summer, due to heightened chemical interaction with anthropogenic sources, which are then followed by rising EIB O3 during the fall and winter months. For some high-elevation western US sites, this seasonal pattern is less discernible due to relatively small anthropogenic contributions and the high EIB O3 estimated throughout the year. EIB O3 at all high-elevation sites contributes a significant proportion to total O3 throughout the year and throughout the observed total O3 frequency distribution, while EIB O3 at most urban sites contributes a major portion to total O3 during non-summer months and to the mid-range concentrations (30-50ppb) of the frequency distribution. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81080
Appears in Collections: 气候变化事实与影响
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作者单位: A.S.L. and Associates, 302 North Last Chance Gulch, Helena, MT 59601, United States; ENVIRON International Corporation, 773 San Marin Drive, Suite 2115, Novato, CA 94945, United States; 320 Eastwood Road, Chapel Hill, NC 27514, United States; Institute for Atmospheric and Climate Science, ETH Zurich, Universitätstrasse 16, 8092 Zurich, Switzerland; CIRES, University of Colorado, NOAA ESRL, Global Monitoring Division, 325 Broadway, Boulder, CO 80305, United States
Recommended Citation:
Lefohn A,S,, Emery C,et al. Estimates of background surface ozone concentrations in the United States based on model-derived source apportionment[J]. Atmospheric Environment,2014-01-01,84