References

ACP

Atmospheric Chemistry and Physics

ACP

1680-7324

Copernicus GmbH

Göttingen, Germany

10.5194/acp-12-5017-2012

Vertical particle concentration profiles around urban office buildings

Quang

T. N.

¹ ² He

¹ Morawska

¹ Knibbs

L. D.

¹ Falk

International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, QLD 4001, Australia

Institute of Environmental Science and Engineering, National University of Civil Engineering, Hanoi, Vietnam

07 06 2012

12 11 5017 5030

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Despite its role in determining both indoor and outdoor human exposure to anthropogenic particles, there is limited information describing vertical profiles of particle concentrations in urban environments, especially for ultrafine particles. Furthermore, the results of the few studies performed have been inconsistent. As such, this study aimed to assess the influence of vehicle emissions and nucleation formation on particle characteristics (particle number size distribution – PNSD and PM2.5 concentration) at different heights around three urban office buildings located next to busy roads in Brisbane, Australia, and place these results in the broader context of the existing literature. Two sets of instruments were used to simultaneously measure PNSD, particle number (PN) and PM2.5 concentrations, respectively, for up to three weeks at each building. The results showed that both PNSD and PM2.5 concentration around building envelopes were influenced by vehicle emissions and new particle formation, and that they exhibited variability across the three different office buildings. During nucleation events, PN concentration in size range of <30 nm and total PN concentration increased (7–65% and 5–46%, respectively), while PM2.5 concentration decreased (36–52%) with height. This study has shown an under acknowledged role for nucleation in producing particles that can affect large numbers of people, due to the high density and occupancy of urban office buildings and the fact that the vast majority of people's time is spent indoors. These findings highlight important new information related to the previously overlooked role of particle formation in the urban atmosphere and its potential effects on selection of air intake locations and appropriate filter types when designing or upgrading mechanical ventilation systems in urban office buildings. The results also serve to better define particle behaviour and variability around building envelopes, which has implications for studies of both human exposure and particle dynamics.

References 1

Boy, M. and Kulmala, M.: Nucleation events in the continental boundary layer: Influence of physical and meteorological parameters, Atmos. Chem. Phys., 2, 1–16, http://dx.doi.org/10.5194/acp-2-1-2002doi:10.5194/acp-2-1-2002, 2002.

Bullin, J. A., Bower, S. C., Hinz, M., and Moe, R. D.: Aerosols near urban street intersections, J. Air Pollut. Contr. Assoc., 35, 355–358, 1985.

Chan, L. Y. and Kwok, W. S.: Vertical dispersion of suspended particulates in urban area of Hong Kong, Atmos. Environ., 34, 4403–4412, 2000.

Chen, M. L. and Mao, I. F.: Spatial variations of airborne particles in metropolitan Taipei, Sci. Total Environ., 209, 225–231, 1998.

Cheung, H. C., Morawska, L., and Ristovski, Z. D.: Observation of new particle formation in subtropical urban environment, Atmos. Chem. Phys., 11, 3823–3833, http://dx.doi.org/10.5194/acp-11-3823-2011doi:10.5194/acp-11-3823-2011, 2011.

Dal Maso, M., Kulmala, M., Riipinen, I., Wagner, R., Hussein, T., Aalto, P. P., and Lehtinen, K. E. J.: Formation and growth of fresh atmospheric aerosols: eight years of aerosol size distribution data from SMEAR II, Hyytiala, Finland, Boreal Environ. Res., 10, 323–336, 2005.

Davidson, C. I., Phalen, R. F., and Solomon, P. A.: Airborne particulate matter and human health: A review, Aerosol Sci. Technol., 39, 737–749, http://dx.doi.org/10.1080/02786820500191348doi:10.1080/02786820500191348, 2005.

Franck, U., Odeh, S., Wiedensohler, A., Wehner, B., and Herbarth, O.: The effect of particle size on cardiovascular disorders – The smaller the worse, Sci. Total Environ., 409, 4217–4221, 2011.

Gao, J., Wang, T., Zhou, X., Wu, W., and Wang, W.: Measurement of aerosol number size distributions in the Yangtze River delta in China: Formation and growth of particles under polluted conditions, Atmos. Environ., 43, 829–836, 2009.

Harrison, R. M., Jones, M., and Collins, G.: Measurements of the physical properties of particles in the urban atmosphere, Atmos. Environ., 33, 309–321, 1999.

He, M. and Dhaniyala, S.: Vertical and horizontal concentration distributions of ultrafine particles near a highway, Atmos. Environ., 46, 225–236, 2012.

Hitchins, J., Morawska, L., Gilbert, D., and Jamriska, M.: Dispersion of particles from vehicle emissions around high- and low-rise buildings, Indoor Air-Int. J. Indoor Air Qual. Clim., 12, 64–71, 2002.

Horvath, H., Kreiner, I., Norek, C., Preining, O., and Georgi, B.: Diesel emissions in Vienna, Atmos. Environ., 22, 1255–1269, 1988.

Hussein, T., Martikainen, J., Junninen, H., Sogacheva, L., Wagner, R., Dal Maso, M., Riipinen, I., Aalto, P. P., and Kulmala, M.: Observation of regional new particle formation in the urban atmosphere, Tellus B, 60, 509–521, http://dx.doi.org/10.1111/j.1600-0889.2008.00365.xdoi:10.1111/j.1600-0889.2008.00365.x, 2008.

Imhof, D., Weingartner, E., Vogt, U., Dreiseidler, A., Rosenbohm, E., Scheer, V., Vogt, R., Nielsen, O. J., Kurtenbach, R., Corsmeier, U., Kohler, M., and Baltensperger, U.: Vertical distribution of aerosol particles and NO$_\mathrmx$ close to a motorway, Atmos. Environ., 39, 5710–5721, http://dx.doi.org/10.1016/j.atmosenv.2004.07.036doi:10.1016/j.atmosenv.2004.07.036, 2005.

Kalaiarasan, M., Balasubramanian, R., Cheong, K. W. D., and Tham, K. W.: Traffic-generated airborne particles in naturally ventilated multi-storey residential buildings of Singapore: Vertical distribution and potential health risks, Build. Environ., 44, 1493–1500, 2009.

Kumar, P., Fennell, P. S., Hayhurst, A. N., and Britter, R. E.: Street Versus Rooftop Level Concentrations of Fine Particles in a Cambridge Street Canyon, Bound.-Lay. Meteorol., 131, 3–18, http://dx.doi.org/10.1007/s10546-008-9300-3doi:10.1007/s10546-008-9300-3, 2009.

Leuzzi, G. and Monti, P.: Particle trajectory simulation of dispersion around a building, Atmos. Environ., 32, 203–214, http://dx.doi.org/10.1016/S1352-2310(97)00291-4doi:10.1016/S1352-2310(97)00291-4, 1998.

Li, X. L., Wang, J. S., Tu, X. D., Liu, W., and Huang, Z.: Vertical variations of particle number concentration and size distribution in a street canyon in Shanghai, China, Sci. Total Environ., 378, 306–316, http://dx.doi.org/10.1016/j.scitotenv.2007.02.040doi:10.1016/j.scitotenv.2007.02.040, 2007.

Longley, I. D., Gallagher, M. W., Dorsey, J. R., Flynn, M., Allan, J. D., Alfarra, M. R., and Inglis, D.: A case study of aerosol (4.6 nm < Dp < 10 μm) number and mass size distribution measurements in a busy street canyon in Manchester, UK, Atmos. Environ., 37, 1563–1571, http://dx.doi.org/10.1016/S1352-2310(03)00010-4doi:10.1016/S1352-2310(03)00010-4, 2003.

Longley, I. D., Gallagher, M. W., Dorsey, J. R., Flynn, M., Bower, K. N., and Allan, J. D.: Street canyon aerosol pollutant transport measurements, Sci. Total Environ., 334–335, 327–336, http://dx.doi.org/10.1016/j.scitotenv.2004.04.072doi:10.1016/j.scitotenv.2004.04.072, 2004.

Mejía, J. F. and Morawska, L.: An investigation of nucleation events in a coastal urban environment in the Southern Hemisphere, Atmos. Chem. Phys., 9, 7877–7888, http://dx.doi.org/10.5194/acp-9-7877-2009doi:10.5194/acp-9-7877-2009, 2009.

Micallef, A. and Colls, J. J.: Variation in airborne particulate matter concentration over the first three metres from ground in a street canyon: Implications for human exposure, Atmos. Environ., 32, 3795–3799, 1998.

Morawska, L., Ristovski, Z., Jayaratne, E. R., Keogh, D. U., and Ling, X.: Ambient nano and ultrafine particles from motor vehicle emissions: Characteristics, ambient processing and implications on human exposure, Atmos. Environ., 42, 8113–8138, http://dx.doi.org/10.1016/j.atmosenv.2008.07.050doi:10.1016/j.atmosenv.2008.07.050, 2008.

O'Dowd, C., McFiggans, G., Creasey, D. J., Pirjola, L., Hoell, C., Smith, M. H., Allan, B. J., Plane, J. M. C., Heard, D. E., and Lee, J. D.: On the photochemical production of new particles in the coastal boundary layer, Geophys. Res. Lett., 26, 1707–1710, 1999.

Oberdorster, G.: Toxicology of ultrafine particles: in vivo study, Philos. T. R. Soc. Lond., 358, 2719–2740, 2000.

Park, K., Park, J. Y., Kwak, J.-H., Cho, G. N., and Kim, J.-S.: Seasonal and diurnal variations of ultrafine particle concentration in urban Gwangju, Korea: Observation of ultrafine particle events, Atmos. Environ., 42, 788–799, http://dx.doi.org/10.1016/j.atmosenv.2007.09.068doi:10.1016/j.atmosenv.2007.09.068, 2008.

Perez, N., Pey, J., Cusack, M., Reche, C., Querol, X., Alastuey, A., and Viana, M.: Variability of Particle Number, Black Carbon, and PM$_10$, PM$_2.5$, and PM$_1$ Levels and Speciation: Influence of Road Traffic Emissions on Urban Air Quality, Aerosol Sci. Technol., 44, 487–499, http://dx.doi.org/10.1080/02786821003758286doi:10.1080/02786821003758286, 2010.

Pey, J., Rodriguez, S., Querol, X., Alastuey, A., Moreno, T., Putaud, J. P., and Van Dingenen, R.: Variations of urban aerosols in the western Mediterranean, Atmos. Environ., 42, 9052–9062, http://dx.doi.org/10.1016/j.atmosenv.2008.09.049doi:10.1016/j.atmosenv.2008.09.049, 2008.

Pey, J., Querol, X., Alastuey, A., Rodriguez, S., Putaud, J. P., and Van Dingenen, R.: Source apportionment of urban fine and ultra-fine particle number concentration in a Western Mediterranean city, Atmos. Environ., 43, 4407–4415, http://dx.doi.org/10.1016/j.atmosenv.2009.05.024doi:10.1016/j.atmosenv.2009.05.024, 2009. \hack

Pope, C. A.: Review: Epidemiological basis for particulate air pollution health standards, Aerosol Sci. Technol., 32, 4–14, 2000.

Qian, S., Sakurai, H., and McMurry, P. H.: Characteristics of regional nucleation events in urban East St. Louis, Atmos. Environ., 41, 4119–4127, http://dx.doi.org/10.1016/j.atmosenv.2007.01.011doi:10.1016/j.atmosenv.2007.01.011, 2007.

Rubino, F. M., Floridia, L., Tavazzani, M., Fustinoni, S., Giampiccolo, R., and Colombi, A.: Height profile of some air quality markers in the urban atmosphere surrounding a 100~m tower building, Atmos. Environ., 32, 3569-3580, 1998.

Salma, I., Borsós, T., Weidinger, T., Aalto, P., Hussein, T., Dal Maso, M., and Kulmala, M.: Production, growth and properties of ultrafine atmospheric aerosol particles in an urban environment, Atmos. Chem. Phys., 11, 1339–1353, http://dx.doi.org/10.5194/acp-11-1339-2011doi:10.5194/acp-11-1339-2011, 2011.

Schwartz, J. and Neas, L. M.: Fine particles are more strongly associated than coarse particles with acute respiratory health effects in schoolchildren, Epidemiology, 11, 6–10, 2000.

Stanier, C. O., Khlystov, A. Y., and Pandis, S. N.: Nucleation events during the Pittsburgh air quality study: Description and relation to key meteorological, gas phase, and aerosol parameters, Aerosol Sci. Technol., 38, 253–264, http://dx.doi.org/10.1080/02786820390229570doi:10.1080/02786820390229570, 2004.

Väkevä, M., Hämeri, K., Kulmala, M., Lahdes, R., Ruuskanen, J., and Laitinen, T.: Street level versus rooftop concentrations of submicron aerosol particles and gaseous pollutants in an urban street canyon, Atmos. Environ., 33, 1385–1397, 1999.

Zhu, Y. and Hinds, W. C.: Predicting particle number concentrations near a highway based on vertical concentration profile, Atmos. Environ., 39, 1557–1566, http://dx.doi.org/10.1016/j.atmosenv.2004.11.015doi:10.1016/j.atmosenv.2004.11.015, 2005.