Atmospherics
; Earth atmosphere
; Pollution
; Ambient concentrations
; Anthropogenic
; Anthropogenic signals
; Atmospheric conditions
; Hebdomadal (day of the week)
; High temporal resolution measurement
; Indianapolis
; Spatiotemporal variability
; Carbon monoxide
; carbon monoxide
; anthropogenic source
; atmospheric pollution
; carbon monoxide
; concentration (composition)
; extreme event
; particulate matter
; spatiotemporal analysis
; urban area
; urban pollution
; article
; controlled study
; environmental exposure
; human
; measurement accuracy
; meteorology
; priority journal
; spatiotemporal analysis
; United States
; urban area
; velocity
; wind
; Indiana
; Indianapolis
; 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:
Spatiotemporal variability of fine particle concentrations in Indianapolis, Indiana is quantified using a combination of high temporal resolution measurements at four fixed sites and mobile measurements with instruments attached to bicycles during transects of the city. Average urban PM2.5 concentrations are an average of ~3.9-5.1μgm-3 above the regional background. The influence of atmospheric conditions on ambient PM2.5 concentrations is evident with the greatest temporal variability occurring at periods of one day and 5-10 days corresponding to diurnal and synoptic meteorological processes, and lower mean wind speeds are associated with episodes of high PM2.5 concentrations. An anthropogenic signal is also evident. Higher PM2.5 concentrations coincide with morning rush hour, the frequencies of PM2.5 variability co-occur with those for carbon monoxide, and higher extreme concentrations were observed mid-week compared to weekends. On shorter time scales (
Indiana University, Department of Geological Sciences, Atmospheric Science Program, Indiana University - Bloomington, 702 North Walnut Grove Avenue, Bloomington, IN 47405, United States
Recommended Citation:
Sullivan R,C,, Pryor S,et al. Quantifying spatiotemporal variability of fine particles in an urban environment using combined fixed and mobile measurements[J]. Atmospheric Environment,2014-01-01,89