DOI: 10.1016/j.atmosenv.2017.09.003
Scopus记录号: 2-s2.0-85029506025
论文题名: Comparisons of traffic-related ultrafine particle number concentrations measured in two urban areas by central, residential, and mobile monitoring
作者: Simon M ; C ; , Hudda N ; , Naumova E ; N ; , Levy J ; I ; , Brugge D ; , Durant J ; L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 169 起始页码: 113
结束页码: 127
语种: 英语
英文关键词: Exposure
; Mobile monitoring
; Particle number concentration
; Residential monitoring
; Stationary monitoring
; Ultrafine particles
Scopus关键词: Health risks
; Housing
; Risk assessment
; Risk perception
; Roads and streets
; Transportation
; Exposure
; Mobile monitoring
; Particle number concentration
; Pearson correlation
; Spatial heterogeneity
; Temporal correlations
; Ultrafine particle
; Ultrafine particle number
; Monitoring
; comparative study
; concentration (composition)
; epidemiology
; health impact
; health risk
; particulate matter
; pollution exposure
; pollution monitoring
; residential location
; risk assessment
; traffic emission
; urban atmosphere
; air monitoring
; air pollution
; air quality
; air temperature
; ambient air
; Article
; chemical oxygen demand
; comparative study
; concentration (parameters)
; correlational study
; day length
; environmental exposure
; humidity
; Massachusetts
; material state
; night
; particle number concentration
; priority journal
; quality control
; residential area
; seasonal variation
; sensitivity analysis
; spatiotemporal analysis
; summer
; traffic
; ultrafine particle
; urban area
; wind
; winter
; Boston
; Chelsea
; Massachusetts
; 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: Traffic-related ultrafine particles (UFP; <100 nm diameter) are ubiquitous in urban air. While studies have shown that UFP are toxic, epidemiological evidence of health effects, which is needed to inform risk assessment at the population scale, is limited due to challenges of accurately estimating UFP exposures. Epidemiologic studies often use empirical models to estimate UFP exposures; however, the monitoring strategies upon which the models are based have varied between studies. Our study compares particle number concentrations (PNC; a proxy for UFP) measured by three different monitoring approaches (central-site, short-term residential-site, and mobile on-road monitoring) in two study areas in metropolitan Boston (MA, USA). Our objectives were to quantify ambient PNC differences between the three monitoring platforms, compare the temporal patterns and the spatial heterogeneity of PNC between the monitoring platforms, and identify factors that affect correlations across the platforms. We collected >12,000 h of measurements at the central sites, 1000 h of measurements at each of 20 residential sites in the two study areas, and >120 h of mobile measurements over the course of ∼1 year in each study area. Our results show differences between the monitoring strategies: mean 1 min PNC on-roads were higher (64,000 and 32,000 particles/cm3 in Boston and Chelsea, respectively) compared to central-site measurements (23,000 and 19,000 particles/cm3) and both were higher than at residences (14,000 and 15,000 particles/cm3). Temporal correlations and spatial heterogeneity also differed between the platforms. Temporal correlations were generally highest between central and residential sites, and lowest between central-site and on-road measurements. We observed the greatest spatial heterogeneity across monitoring platforms during the morning rush hours (06:00-09:00) and the lowest during the overnight hours (18:00-06:00). Longer averaging times (days and hours vs. minutes) increased temporal correlations (Pearson correlations were 0.69 and 0.60 vs. 0.39 in Boston; 0.71 and 0.61 vs. 0.45 in Chelsea) and reduced spatial heterogeneity (coefficients of divergence were 0.24 and 0.29 vs. 0.33 in Boston; 0.20 and 0.27 vs. 0.31 in Chelsea). Our results suggest that combining stationary and mobile monitoring may lead to improved characterization of UFP in urban areas. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82411
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, Tufts University, 200 College Avenue, Medford, MA, United States; Friedman School of Nutrition Science and Policy, Tufts University, 150 Harrison Avenue, Boston, MA, United States; School of Public Health, Boston University, 715 Albany Street, Boston, MA, United States; Department of Public Health and Community Medicine, Tufts University, 136 Harrison Avenue, Boston, MA, United States
Recommended Citation:
Simon M,C,, Hudda N,et al. Comparisons of traffic-related ultrafine particle number concentrations measured in two urban areas by central, residential, and mobile monitoring[J]. Atmospheric Environment,2017-01-01,169