Purdue Climate Change Research Center

Sonia Lasher-Trapp

Contact Information

CIVL 4259A


Sonia’s research group focuses on observational analysis and numerical modeling of individual clouds, with an emphasis on precipitation formation processes. Climate change can result in differences in cloud condensation and ice nuclei, atmospheric water vapor, the vertical profile of atmospheric temperature, among other variables, all of which can modify types and amounts of precipitation, the radiative properties of clouds, and cloud longevity. Sonia's current research projects include: investigating the importance of giant aerosol particles to supercooled drizzle formation in aircraft icing environments, investigating the importance of giant aerosol particles and entrainment to the initiation of precipitation in trade wind cumulus clouds, evaluating the prediction of hail in the Weather Research and Forecasting (WRF) model in order to evaluate changes in hailstorm frequency and intensity under future climate scenarios, and developing improved 3D visualization tools for cloud microphysical observations and numerical modeling results.

Selected Publications

Lasher-Trapp, S., 2008: Clouds in a warmer climate: Friend of foe? Oxford Forum on Public Policy, in press.

Lasher-Trapp, S., S. Anderson-Bereznicki, A. Shackelford, C. H. Twohy, and J. G. Hudson, 2008: An investigation of the influence of droplet number concentration and giant aerosol particles upon supercooled large drop formation in wintertime stratiform clouds. Journal of Applied Meteorology and Climatology, in press.

Rauber, R. M., and coauthors, 2007: Rain in shallow cumulus over the ocean—the RICO campaign. Bulletin of the American Meteorological Society 88, 1912-1928.

Lasher-Trapp, S., and J. P. Stachnik, 2007: Giant and Ultragiant Aerosol Particle Variability over the Eastern Great Lakes Region. Journal of Applied Meteorology 46, 651-659.

Lasher-Trapp, S., W. A. Cooper and A. M. Blyth, 2005: Broadening of Droplet Size Distributions from Entrainment and Mixing in a Cumulus Cloud. Quarterly Journal of the Royal Meteorological Society, 131, 195-220.

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