Department of Civil & Environmental Engineering


Dr. Timothy VanReken

Associate Professor

Phone: (509) 335-5055
FAX: (509) 335-7632
LAR Home Page



  • Ph.D, Chemical Engineering, 2004 - California Institute of Technology
  • B.S., Chemical Engineering, 1997- University of Florida


  • 2014 to present, Associate Professor, Department of Civil & Environmental Engineering, Laboratory for Atmospheric Research, Washington State University
  • 2007 - 2014, Assistant Professor, Department of Civil & Environmental Engineering, Laboratory for Atmospheric Research, Washington State University
  • 2004 - 2006, Postdoctoral Fellow, Advanced Study Program, National Center for Atmospheric Research, Boulder, CO
  • 2003 - 2004, Postdoctoral Scholar, Department of Environmental Science & Engineering, California Institute of Technology


  • 2010 - Department of Energy Early Career Research Award
  • 2008 - 3M Nontenured Faculty Award
  • 2004 - 2006, NCAR Advanced Study Program Postdoctoral Fellowship
  • 1998 - 2001, EPA STAR Graduate Fellowship


  • Biogenic Secondary Organic Aerosol Formation
  • Aerosol/Cloud Interactions
  • Particle Flux Measurements
  • Urban Air Quality
  • Dust and Bioaerosols


  • Air Pollution Management
  • Aerosol Dynamics & Chemistry


  • Chung, S.H., Basarab, B.M., and VanReken, T.M., “Regional Impacts of Ultrafine Particle Emissions from the Surface of the Great Lakes”, Atmospheric Chemistry and Physics, 11, 12601-12615, 2011.
  • Slade, J.H., VanReken, T.M., Mwaniki, G.R., Bertman, S., Stirm, B., and Shepson, P.B., “Aerosol Production from the Surface of the Great Lakes”, Geophysical Research Letters, 37, L18807, doi:10.1029/2010GL043852, 2010.
  • VanReken, T.M., Nenes, A., “Cloud Formation in the Plumes of Solar Chimney Power Generation Facilities: A Modeling Study”, Journal of Solar Energy Engineering, 131, 011009, 2009.
  • Smith, J.N., Dunn, M.J., VanReken, T.M., Iida, K., Stolzenburg, M.R., McMurray, P.H., and Huey, L.G., “Chemical Composition of Atmospheric Nanoparticles Formed from Nucleation in Tecamac, Mexico: Evidence for an Important Role for Organic Species in Nanoparticle Growth”, Geophysical Research Letters, 35, L04808, doi:10.1029/2007GL032523, 2008.
  • VanReken, T.M., Greenberg, J.P., Harley, P.C., Guenther, A.B., and Smith, J.N., “Direct Measurement of Particle Formation and Growth from the Oxidation of Biogenic Emissions”, Atmospheric Chemistry and Physics, 6, 4403-4413, 2006.
  • Rissman, T.A., VanReken, T.M., Wang, J., Gasparini, R., Collins, D.R., Jonsson, H.H., Brechtel, F.J., Flagan, R.C., and Seinfeld, J.H., “Characterization of Ambient Aerosol from Measurements of Cloud Condensation Nuclei during the 2003 Atmospheric Radiation Measurement (ARM) Aerosol Intensive Operational Period (IOP) at the Southern Great Plains (SGP) Site in Oklahoma”, Journal of Geophysical Research-Atmospheres, 111(D5), D05S11, doi:10.1029/2004JD005695, 2006.
  • VanReken, T.M., Ng, N.L., Flagan, R.C., and Seinfeld, J.H., “Cloud Condensation Nucleus Activation Properties of Biogenic Secondary Organic Aerosol”, Journal of Geophysical Research-Atmospheres, 110, D07206, doi:10.1029/2004JD005465, 2005.
  • Conant, W.C., VanReken, T.M., Rissman, T.A., Varutbangkul, V., Jonsson, H.H., Nenes, A., Jimenez, J.L., Delia, A.E., Bahreini, R., Roberts, G.C., Flagan, R.C., and Seinfeld J.H., “Aerosol-cloud drop concentration closure in warm cumulus”, Journal of Geophysical Research-Atmospheres 109(D13), D13204, doi:10.1029/2003JD004324, 2004.
  • VanReken, T.M., Nenes, A., Flagan, R.C., and Seinfeld, J.H., “Concept for a New Cloud Condensation Nucleus (CCN) Spectrometer”, Aerosol Science and Technology, 38(7), 639-654, 2004.
  • VanReken, T.M., Rissman, T.A., Roberts, G.C., Varutbangkul, V., Jonsson, H.H., Flagan, R.C., and Seinfeld, J.H., “Toward Aerosol/Cloud Condensation Nucleus (CCN) Closure during CRYSTAL-FACE”, Journal of Geophysical Research-Atmospheres 108(D20), 4633, doi:10.1029/2003JD003582, 2003.

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