Browsing Physics & Atmospheric Science by Author "Leaitch, W. R."
Now showing items 1-5 of 5
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Aerosol composition and sources in the central Arctic Ocean during ASCOS
Chang, R. Y. -W; Leck, C.; Graus, M.; Mueller, M.; Paatero, J.; Burkhart, J. F.; Stohl, A.; Orr, L. H.; Hayden, K.; Li, S. -M; Hansel, A.; Tjernstrom, M.; Leaitch, W. R.; Abbatt, J. P. D. (2011)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 ... -
Characterization of a large biogenic secondary organic aerosol event from eastern Canadian forests
Slowik, J. G.; Stroud, C.; Bottenheim, J. W.; Brickell, P. C.; Chang, R. Y. -W; Liggio, J.; Makar, P. A.; Martin, R. V.; Moran, M. D.; Shantz, N. C.; Sjostedt, S. J.; van Donkelaar, A.; Vlasenko, A.; Wiebe, H. A.; Xia, A. G.; Zhang, J.; Leaitch, W. R.; Abbatt, J. P. D. (2010)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 ... -
Closure between measured and modeled cloud condensation nuclei (CCN) using size-resolved aerosol compositions in downtown Toronto
Broekhuizen, K.; Chang, R. Y. -W; Leaitch, W. R.; Li, S. -M; Abbatt, J. P. D. (2006-06)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 ... -
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; Slowik, J. G.; Shantz, N. C.; Vlasenko, A.; Liggio, J.; Sjostedt, S. J.; Leaitch, W. R.; Abbatt, J. P. D. (2010)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 ... -
Slower CCN growth kinetics of anthropogenic aerosol compared to biogenic aerosol observed at a rural site
Shantz, N. C.; Chang, R. Y. -W; Slowik, J. G.; Vlasenko, A.; Abbatt, J. P. D.; Leaitch, W. R. (2010)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 ...