I am a Senior Research Scientist in Dr. Sonia Kreidenweis's research group, within the Atmospheric Chemistry Program. My research interests at CSU lie in the area of aerosol-cloud interactions, particularly ice phase transitions of atmospheric particles for conditions present in various regions of the troposphere, including layer clouds in winter, cumulus clouds, and cirrus clouds. The goals of my research are to understand the way that aerosol particles of natural or anthropogenic origin determine the ice phase composition of clouds and in turn how clouds impact the distribution and nature of ice nucleating aerosols in the atmosphere. This information is important to the fundamental issue of how aerosols affect climate indirectly by impacting the radiative properties of clouds, latent heating of the atmosphere, and precipitation. Other members of the ice phase transitions study group at CSU include Dr. Yutaka Tobo, Dr. Thomas Hill, Dr. Ezra Levin, and Ms. Christina McCluskey. Our research approach involves laboratory and field studies using specialized instrumentation, and numerical modeling studies from the process level to the global scale in collaboration with external investigators and the Center for Multiscale Modeling of Atmospheric Processes (CMMAP).

Curriculum Vitae


  • NSF-funded studies of biological ice nuclei in a western forest environment, and their elevation in number during rain events, featured in three publications this year
  • Huffman, J. A., Prenni, A. J., DeMott, P. J., Pöhlker, C., Mason, R. H., Robinson, N. H., Fröhlich-Nowoisky, J., Tobo, Y., Després, V. R., Garcia, E., Gochis, D. J., Harris, E., Müller-Germann, I., Ruzene, C., Schmer, B., Sinha, B., Day, D. A., Andreae, M. O., Jimenez, J. L., Gallagher, M., Kreidenweis, S. M., Bertram, A. K., and Pöschl, U.: High concentrations of biological aerosol particles and ice nuclei during and after rain, Atmos. Chem. Phys., 13, 6151-6164, doi:10.5194/acp-13-6151-2013, 2013(link)
  • Prenni, A. J. Y. Tobo, E. Garcia, P. J. DeMott, C. McCluskey, S. M. Kreidenweis, J. Prenni, A. Huffman, U. Pöschl, and C. Pöhlker, 2013: The impact of rain on ice nuclei populations. Geophys. Res. Lett., 40, doi:10.1029/2012GL053953.(link)
  • NSF Chemistry Division awards the Center for Aerosol Impacts on Climate and the Environment (CAICE) at UCSD Phase 2 funding. Paul is a co-investigator for Phase 2, leading ice nucleation experimental studies.
  • Paul, Ezra, and Tom will attend the upcoming Fall AGU Meeting from December 9-13, 2013.
  • In the last several months our group has welcomed Tom Hill, our atmospheric microbiologist, and wished Tony Prenni well as he begins a new permanent position with the National Parks Service. We also congratulate Christina on her M.S. degree and moving on to her Ph.D studies

Contact info

Paul J. DeMott
Department of Atmospheric Science
1371 Campus Delivery
Colorado State University
Fort Collins, Colorado 80523
email*: pdemott-AT-lamar.colostate.edu
office: (970) 491-82577

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