Cassandra Gaston

Cassandra Gaston

Assistant Professor, Department of Atmospheric Sciences

University of Miami
4600 Rickenbacker Causeway
Miami, Florida 33149

Tel: 305.421.4979

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My research interests are in atmospheric chemistry with a focus on the impact of atmospheric particles (i.e., aerosols) and gases on air quality, cloud formation, and climate. Specific interests of mine include understanding the role of ocean biota on the production of marine aerosols, the effect of aerosol deposition on ocean ecosystems, and the impact of heterogeneous reactions (i.e., reactions between trace gases and particles) on air quality and the formation of secondary organic aerosol. I use field- deployable instrumentation, namely mass spectrometry, to measure aerosols and trace gases. These techniques are applied to both laboratory studies and field measurements using ground sites and ships as sampling platforms. Results from these measurements are used to constrain parameterizations of atmospheric reactions that are of importance to both human health and climate. In addition to research, I am also actively involved in outreach efforts, particularly those that aim to promote young women in the sciences.

Lopez-Hilfiker, F., C. Mohr, E. D'Ambro, C.J. Gaston, A. Lutz, T. Riedel, S. Iyer, Z. Zhang, A. Gold, J. Surratt, B. Lee, T. Kurtén, W.W. Hu, J. Jimenez, M. Hallquist, J. Thornton. 2015. Molecular composition and volatility of organic aerosol formed in a polluted isoprene-rich region. Environ. Sci. Tech. Submitted.

Gaston, C.J., H. Furutani, S.A. Guazzotti, K.R. Coffee, J. Jung, M. Uematsu, K.A. Prather. 2015. Direct night-time ejection of particle-phase reduced biogenic sulfur compounds from the ocean to the atmosphere. Environ. Sci. Tech., DOI: 10.1021/es506177s.

Riedel, T.P., Y.-H. Lin, S.H. Budisulistiorini, C.J. Gaston, J.A. Thornton, Z. Zhang, W.G. Vizuete, A. Gold, J.D. Surratt. 2015. Heterogeneous reactions of isoprene-derived epoxides: Reaction probabilities and molar SOA yield estimates. Environ. Sci. Tech. Lett., DOI: 10.1021/ez500406f.

Gaston, C.J., T.P. Riedel, Z. Zhang, A. Gold, J.D. Surratt, J.A. Thornton. 2014. Reactive uptake of an isoprene-derived epoxydiol to submicron aerosol particles. Environ. Sci. Tech., 48(19): 11178- 11186.

Gaston, C.J., J.A. Thornton, and N.L. Ng. 2014. Reactive uptake of N2O5 to internally mixed inorganic and organic particles: The role of organic carbon oxidation state and inferred organic phase separations. Atmos. Chem. Phys., 14, 5693-5707.

Ryder, O.S., A.P. Ault, J.F. Cahill, T.L. Guasco, L. Cuadra-Rodriguez, C.J. Gaston, E. Fitzgerald, C. Lee, K.A. Prather, and T.H. Bertram. 2014. On the role of particle mixing state in the reactive uptake of N2O5 to ambient aerosol particles. Environ. Sci. Tech., 48(3): 1618-1627.

Zauscher, M.D., Y. Wang, M.J.K. Moore, C.J. Gaston, K.A. Prather. 2013. Air quality impact and physicochemical aging of biomass burning aerosols during the 2007 San Diego wildfires. Environ. Sci. Tech., DOI: 10.1021/es4004137.

Gaston, C.J., P.K. Quinn, T.S. Bates, J.B. Gilman, D.B. Bon, W.C. Kuster, K.A. Prather. 2013. The impact of shipping, agricultural, and urban emissions on single particle chemistry observed aboard the R/V Atlantis during CalNex. J. Geophys. Res. 118: doi:10.1002/jgrd.50427.

Weiss-Penzias, P., E. Williams, B. Lerner, T. Bates, C.J. Gaston, K.A. Prather, A. Vlasenko, S.-M. Li. 2013. . J. Geophys. Res., 118: .

Riedel, T.P., T.H. Bertram, O.S. Ryder, S. Liu, D.A. Day, L.M. Russell, C.J. Gaston, K.A. Prather, J.A. Thornton. 2012. Direct N2O5 reactivity measurements at a polluted coastal site. Atmos. Chem. Phys., 12: 2959-2968.

Gaston, C.J., H. Furutani, S.A. Guazzotti, K.R. Coffee, T.S. Bates, P.K. Quinn, L.I. Aluwihare, B.G. Mitchell, K.A. Prather. 2011. Unique ocean-derived particles serve as a proxy for changes in ocean chemistry. J. Geophys. Res.-[Atmospheres]. 116 (D18310): doi: 10.1029/2010JD015289.

Ault, A.P., C.R. Williams, A.B. White, P.J. Neiman, J.M. Creamean, C.J. Gaston, F.M. Ralph, K.A. Prather. 2011. Detection of Asian dust in California orographic precipitation. J. Geophys. Res.- [Atmospheres], 116 (D16205): doi:10.1029/2010JD015351.

Urbano, R., B. Palenik, C.J. Gaston, K.A. Prather. 2011. Detection and phylogenetic analysis of coastal bioaerosols using culture dependent and independent techniques. Biogeosciences. 8: 301-309.

Pratt, K.A., C.H. Twohy, S.M. Murphy, R.C. Moffett, A.J. Heymsfield, C.J. Gaston, P.J. DeMott, P.R. Field, T.R. Henn, D.C. Rogers, M.K. Gilles, J.H. Seinfeld, K.A. Prather. 2010. Observation of playa salts as nuclei in orographic wave clouds. J. Geophys. Res.-[Atmospheres]. 115 (D15301): doi:10.1029/2009JD013606.

Ault, A.P., C.J. Gaston, Y. Wang, G. Dominguez, M.H. Thiemens, K.A. Prather. 2010. Characterization of the single particle mixing state of individual ship plume events measured at the Port of Los Angeles. Environ. Sci. Tech. 44(6): 1954-1961.

Gaston, C.J., K.A. Pratt, X. Qin, K.A. Prather. 2010. Real-time detection and mixing state of methanesulfonate in single particles at an inland urban location during a phytoplankton bloom. Environ. Sci. Tech. 44(6): 1566-1572.

  • Barkley, Anne
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