Recent Submissions

  • Particle formation and growth at five rural and urban sites 

    Jeong, C-H, G. J. Evans, M. L. McGuire, R. Y-W Chang, et al. 2010. "Particle formation and growth at five rural and urban sites." Atmospheric Chemistry and Physics 10(16): 7979-7995.
    Ultrafine particle (UFP) number and size distributions were simultaneously measured at five urban and rural sites during the summer of 2007 in Ontario, Canada as part of the Border Air Quality and Meteorology Study ...
  • Elucidating determinants of aerosol composition through particle-type-based receptor modeling 

    McGuire, M. L., C. -H Jeong, J. G. Slowik, R. Y. -W Chang, et al. 2011. "Elucidating determinants of aerosol composition through particle-type-based receptor modeling." Atmospheric Chemistry and Physics 11(15): 8133-8155.
    An aerosol time-of-flight mass spectrometer (ATOFMS) was deployed at a semi-rural site in southern Ontario to characterize the size and chemical composition of individual particles. Particle-type-based receptor modelling ...
  • Characterization of a large biogenic secondary organic aerosol event from eastern Canadian forests 

    Slowik, J. G., C. Stroud, J. W. Bottenheim, P. C. Brickell, et al. 2010. "Characterization of a large biogenic secondary organic aerosol event from eastern Canadian forests." Atmospheric Chemistry and Physics 10(6): 2825-2845.
    Measurements of aerosol composition, volatile organic compounds, and CO are used to determine biogenic secondary organic aerosol (SOA) concentrations at a rural site 70 km north of Toronto. These biogenic SOA levels ...
  • Aerosol composition and sources in the central Arctic Ocean during ASCOS 

    Chang, R. Y. -W, C. Leck, M. Graus, M. Mueller, et al. 2011. "Aerosol composition and sources in the central Arctic Ocean during ASCOS." Atmospheric Chemistry and Physics 11(20): 10619-10636.
    Measurements of submicron aerosol chemical composition were made over the central Arctic Ocean from 5 August to 8 September 2008 as a part of the Arctic Summer Cloud Ocean Study (ASCOS) using an aerosol mass spectrometer ...
  • The hygroscopicity parameter (kappa) of ambient organic aerosol at a field site subject to biogenic and anthropogenic influences: relationship to degree of aerosol oxidation 

    Chang, R. Y-W, J. G. Slowik, N. C. Shantz, A. Vlasenko, et al. 2010. "The hygroscopicity parameter (kappa) of ambient organic aerosol at a field site subject to biogenic and anthropogenic influences: relationship to degree of aerosol oxidation." Atmospheric Chemistry and Physics 10(11): 5047-5064.
    Cloud condensation nuclei (CCN) concentrations were measured at Egbert, a rural site in Ontario, Canada during the spring of 2007. The CCN concentrations were compared to values predicted from the aerosol chemical ...
  • Photochemical processing of organic aerosol at nearby continental sites: contrast between urban plumes and regional aerosol 

    Slowik, J. G., J. Brook, R. Y-W Chang, G. J. Evans, et al. 2011. "Photochemical processing of organic aerosol at nearby continental sites: contrast between urban plumes and regional aerosol." Atmospheric Chemistry and Physics 11(6): 2991-3006.
    As part of the BAQS-Met 2007 field campaign, Aerodyne time-of-flight aerosol mass spectrometers (ToF-AMS) were deployed at two sites in southwestern Ontario from 17 June to 11 July 2007. One instrument was located at ...
  • Diurnally resolved particulate and VOC measurements at a rural site: indication of significant biogenic secondary organic aerosol formation 

    Sjostedt, S. J., J. G. Slowik, J. R. Brook, R. Y. -W Chang, et al. 2011. "Diurnally resolved particulate and VOC measurements at a rural site: indication of significant biogenic secondary organic aerosol formation." Atmospheric Chemistry and Physics 11(12): 5745-5760.
    We report simultaneous measurements of volatile organic compound (VOC) mixing ratios including C-6 to C-8 aromatics, isoprene, monoterpenes, acetone and organic aerosol mass loadings at a rural location in southwestern ...
  • Slower CCN growth kinetics of anthropogenic aerosol compared to biogenic aerosol observed at a rural site 

    Shantz, N. C., R. Y. -W Chang, J. G. Slowik, A. Vlasenko, et al. 2010. "Slower CCN growth kinetics of anthropogenic aerosol compared to biogenic aerosol observed at a rural site." Atmospheric Chemistry and Physics 10(1): 299-312.
    Growth rates of water droplets were measured with a static diffusion cloud condensation chamber in May-June 2007 at a rural field site in Southern Ontario, Canada, 70 km north of Toronto. The observations include periods ...
  • Cloud condensation nuclei closure study on summer arctic aerosol 

    Martin, M., R. Y-W Chang, B. Sierau, S. Sjogren, et al. 2011. "Cloud condensation nuclei closure study on summer arctic aerosol." Atmospheric Chemistry and Physics 11(22): 11335-11350.
    We present an aerosol - cloud condensation nuclei (CCN) closure study on summer high Arctic aerosol based on measurements that were carried out in 2008 during the Arctic Summer Cloud Ocean Study (ASCOS) on board the ...
  • The effect of meteorological and chemical factors on the agreement between observations and predictions of fine aerosol composition in southwestern Ontario during BAQS-Met 

    Markovic, M. Z., K. L. Hayden, J. G. Murphy, P. A. Makar, et al. 2011. "The effect of meteorological and chemical factors on the agreement between observations and predictions of fine aerosol composition in southwestern Ontario during BAQS-Met." Atmospheric Chemistry and Physics 11(7): 3195-3210.
    The Border Air Quality and Meteorology Study (BAQS-Met) was an intensive, collaborative field campaign during the summer of 2007 that investigated the effects of transboundary pollution, local pollution, and local ...
  • Closure between measured and modeled cloud condensation nuclei (CCN) using size-resolved aerosol compositions in downtown Toronto 

    Broekhuizen, K., R. Y. -W Chang, W. R. Leaitch, S. -M Li, et al. 2006. "Closure between measured and modeled cloud condensation nuclei (CCN) using size-resolved aerosol compositions in downtown Toronto." Atmospheric Chemistry and Physics 6: 2513-2524.
    Measurements of cloud condensation nuclei (CCN) were made in downtown Toronto during August and September, 2003. CCN measurements were performed at 0.58% supersaturation using a thermal-gradient diffusion chamber, whereas ...