Abstract
Dispersion of particles, as evidenced by changes in their number distributions (PNDs) and concentrations (PNCs), in urban street canyons, is still not well understood. This study compares measurements by a fast-response particle spectrometer (DMS500) of the PNDs and the PNCs (5–1000 nm, sampled at 1 Hz) at street and rooftop levels in a Cambridge UK street canyon, and examines mixing, physical and chemical conversion processes, and the competing influences of traffic volume and rooftop wind speed on the PNDs and the PNCs in various size ranges. PNCs at street level were ≈6.5 times higher than at rooftop. Street-level PNCs followed the traffic volume and decreased with increasing wind speed, showing a larger influence of wind speed on 30–300 nm particles than on 5–30 nm particles. Conversely, rooftop PNCs in the 5–30 nm size range increased with wind speed, whereas those for particles between 30 and 300 nm did not vary with wind speed.
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References
AQEG (2005) Particulate matter in the United Kingdom, Defra London, 444 pp
Bauman SE, Ferek R, Williams ET, Finston HL, Ferrand EF, Santowski J (1982) Street level versus rooftop sampling: carbon monoxide and aerosol in New York city. Atmos Environ 16: 2489–2496
Biskos G, Reavell K, Collings N (2005) Description and theoretical analysis of a Differential Mobility Spectrometer. Aerosol Sci Technol 39: 527–541
Charron A, Harrison RM (2003) Primary particle formation from vehicle emissions during exhaust dilution in the road side atmosphere. Atmos Environ 37: 4109–4119
Collings N, Reavell K, Hands T, Tate J (2003) Roadside aerosol measurements with a fast particle spectrometer. Soc Automotive Eng 20035407
Curtius J (2006) Nucleation of atmospheric aerosol particles. C R Physique 7: 1027–1045
Davidson C, Phalen R, Solomon P (2005) Airborne particulate matter and human health: a review. Aerosol Sci Technol 39: 737–749
De Paul FT, Sheih CM (1986) A tracer study of dispersion in an urban street canyon. Atmos Environ 20: 455–459
Harrison RM, Grenfell JL, Savage N, Allen A, Clemitsaw KC, Penkett S, Hewitt CN, Davison B (2000) Observation of new particle production in the atmosphere of a moderately polluted site in eastern England. J Geophys Res 105: 17819–17832
Hinds WC (1999) Aerosol technology: Properties, behaviour and measurement of airborne particles, 2nd edn. Wiley, UK, p 783 pp
Kastner–Klein P, Fedorovich E, Ketzel M, Berkowicz R, Britter R (2003) The modelling of turbulence from traffic in urban dispersion models—Part II: evaluation against laboratory and full–scale concentration measurements in street canyons. Environ Fluid Mech 3: 145–172
Kerminen V-M, Pijrola L, Kulmala M (2001) How significantly does coagulational scavenging limit atmospheric particle production. J Geophys Res 106: 24119–24125
Ketzel M, Berkowicz R, Muller WJ, Lohmeyer A (2002) Dependence of street canyon concentrations on above–roof wind speed—implications for numerical modelling. Int J Environ Pollut 17: 356–366
Kittelson DB, Watts WF, Johnson JP (2004) Nanoparticle emissions on Minnesota highways. Atmos Environ 38: 9–19
Kulmala M, Pijrola L, Makela JM (2000) Stable sulphate clusters as a source of new atmospheric particles. Nature 404: 66–69
Kulmala M, Vehkamaki H, Petaja T, Dal Maso M, Lauri A, Kerminen V-M, Birmili W, McMurry PH (2004) Formation and growth rates of ultrafine particles: a review of observations. J Aerosol Sci 35: 143–176
Kumar P, Fennel P, Britter R (2007) Measurements and dispersion behaviour of particles in various size ranges (5 nm >dp< 1000 nm) in a Cambridge street canyon. In: Proccedings of the 11th international conference on harmonisation within atmospheric dispersion modelling for regulatory purposes. Cambridge, UK, pp 368–372. http://www.harmo.org/conferences/proceedings/_Cambridge/publishedSections/Pp368–372.pdf
Kumar P, Fennell P, Britter R (2008a) Measurements of particles in the 5–1000 nm range close to road level in an urban street canyon. Sci Total Environ 390: 437–447
Kumar P, Fennell P, Langley D, Britter R (2008b) Pseudo–simultaneous measurements for vertical variations of coarse, fine and ultra fine particles in an urban street canyon. Atmos Environ 42: 4304–4319
Kumar P, Fennell P, Britter R (2008c) Effect of wind direction and speed on the dispersion of nucleation and accumulation mode particles in an urban street canyon. Sci Total Environ 402: 82–94
Li XL, Wang JS, Tu XD, Liu W, Huang L (2007) Vertical variations of particle number concentration and size distribution in a street canyon in Shanghai, China. Sci Total Environ 378: 306–316
Longley ID, Gallagher MW, Dorsey JR, Flynn M, Allan JD, Alfarra D, Inglish D (2003) A case study of aerosol (4.6 nm < D p < 10μm) number and mass size distribution measurements in a busy street canyon in Manchester, U.K. Atmos Environ 37: 1563–1571
Makela J, Hameri K, Vakeva M, Aalto P, Laakso L, Kulmala M, Charlson RJ (1998) On the spatial scale of new particle formation in Sothern Finland. J Aerosol Sci 29: 5215–5216
Oberdorster G (2000) Toxicology of ultrafine particles: in vivo studies. Philos Trans R Soc London A 358: 2719–2740
Oke TR (1988) Street design and urban canopy layer climate. Energy Buildings 11: 103–113
Peters A, Wichmann HE (2001) Epidemiological basis for particulate air pollution health standards. Epidemiology 12: 544
Pope CA III (2000) Review: epidemiological basis for particulate air pollution health standards. Aerosol Sci Technol 32: 4–14
Qin Y, Kot SC (1993) Dispersion of vehicular emission in street canyons, Guanghou city, South China (P.R.C). Atmos Environ 27B: 283–291
QUARG (1996) Airborne particulate matter in the United Kingdom Technical report, Department of Environment, London, UK, 188 pp
Schauer JJ, Hildermann LM, Mazurek MA, Cass GR, T. Simoneit SBT (1996) Source apportionment of airborne particulate matter using organic compounds as tracers. Atmos Environ 30: 3837–3855
Shi PJ, Khan AA, Harrison RM (1999) Measurements of ultra fine particle concentration and size distribution in the urban atmosphere. Sci Total Environ 235: 51–64
Solazzo E, Vardoulakis S, Cai X (2007) Evaluation of traffic–producing turbulence schemes within operating schemes within operational street pollution models using road side measurements. Atmos Environ 41: 5357–5370
Symonds JPR, Reavell KSJ, Olfert JS, Campbell BW, Swift SJ (2007) Diesel soot mass calculations in real–time with a differential mobility spectrometer. J Aerosol Sci 38: 52–68
Tuch T, Brand P, Wichmann HE, Heyder J (1997) Variations of particle number and mass concentration in various size ranges of ambient aerosols in eastern Germany. Atmos Environ 31: 4193–4197
Vakeva M, Hameri K, Kulmala M, Lahdes R, Ruuskanen J, Laitinen T (1999) Street level versus rooftop concentrations of submicron aerosol particles and gaseous pollutants in an urban street canyon. Atmos Environ 33: 1385–1397
Van Dingenen R, Raes F, Putaud J-P, Baltensperger U, Charron A, Facchini M-C, Decesari S, Fuzzi S, Gehrig R, Hansson H-C (2004) A European aerosol phenomenology—1: physical characterstics of particulate matter at kerbside, urban, rural and background sites in Europe. Atmos Environ 38: 2561–2577
Vardoulakis S, Gonzalez-Flesca N, Fisher BEA (2002) Assessment of traffic-related air pollution in two street canyons in Paris: implications for exposure studies. Atmos Environ 36: 1025–1039
Vardoulakis S, Fisher BRA, Pericleous K, Gonzalez-Flesca N (2003) Modelling air quality in street canyons: a review. Atmos Environ 37: 155–182
Wehner B, Weidensohler A (2003) Long term measurements of submicrometer urban aerosols: statistical analysis for correlations with meteorological conditions and trace gases. Atmos Chem Phys 3: 867–879
Zoumakis NM (1995) A note on average vertical profiles of vehicular pollutant concentrations in urban Street Canyons. Atmos Environ 29: 3719–3725
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Kumar, P., Fennell, P.S., Hayhurst, A.N. et al. Street Versus Rooftop Level Concentrations of Fine Particles in a Cambridge Street Canyon. Boundary-Layer Meteorol 131, 3–18 (2009). https://doi.org/10.1007/s10546-008-9300-3
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DOI: https://doi.org/10.1007/s10546-008-9300-3