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Armin Sorooshian

Interim Department Chair of Chemical & Environmental Engineering
Professor of Chemical and Environmental Engineering
Professor of Global Change - Graduate Interdisciplinary Program
Professor of Hydrology and Atmospheric Sciences
Professor of Public Health
University Distinguished Scholar in Chemical and Environmental Engineering
Professor of Optical Sciences
Member of the Graduate Faculty
headshot of person wearing dark suit, blue tie and white shirt

Harshbarger 134

520.626.5858
armin@arizona.edu

Documents

Armin Sorooshian's Full CV (PDF)

Armin received a BS degree in chemical engineering from the University of Arizona (2003) and a PhD in chemical engineering from the California Institute of Technology (2008). He completed a postdoc with the Cooperative Institute for Research in the Atmosphere (CIRA), which involved research with Colorado State University and the National Oceanic and Atmospheric Administration. He has been a professor in the Department of Chemical and Environmental Engineering at the University of Arizona since 2009, with courtesy appointments in Hydrology and Atmospheric Sciences, the College of Optical Sciences and the College of Public Health. Armin is both a University Distinguished Scholar and a da Vinci Fellow.

Degrees

  • PhD Chemical Engineering
    • Caltech, Pasadena, California, USA
    • Aerosol composition and hygroscopicity studies: instrument development/characterization, ambient and laboratory measurements, and modeling
  • MS Chemical Engineering
    • Caltech, Pasadena, California, United States
  • BS Chemical Engineering
    • University of Arizona, Tucson, Arizona, United States

Work Experience

  • Intel (2003)
  • Intel (2002)
  • Hitachi Chemical Company, Ltd. (2001)

Interests

  • Aerosols, Trace Gases, Wet Deposition
  • Air Quality and Public Health 
  • Aerosol-Cloud-Precipitation Interactions
  • Surface and Airborne Field Measurements
  • Arid Region Topics

Research

We study the role of aerosol particles, trace gases, and clouds in the Earth system. This research is important for air quality, public health, climate, the hydrologic cycle and ecosystem health. Currently, the three major foci of this group’s research include the following:

  • Aerosol properties in the atmosphere: Surface, airborne and satellite observations are used to study the physical and chemical properties of aerosol particles. A major objective of this research thrust is to understand the sources, transformation mechanisms and fate of aerosol particles in the atmosphere. Furthermore, we strive to improve understanding of health- and climate-relevant aerosol properties and how they change spatially and temporally.
  • Aerosol-cloud-precipitation interactions: We use a combination of field measurements, satellite data and modeling to improve knowledge of how aerosol and meteorological perturbations alter cloud properties and precipitation, and conversely how clouds modify aerosol particles. 
  • Arid region topics: The U.S. Southwest faces numerous challenges including elevated ground-level ozone levels, dust emissions, wildfires and various forms of extreme events. We study these types of features using observational data and models with the goal of mitigating their deleterious effects.

Courses

View the full course list in UA Profiles.

Selected Awards and Honors

  • 2026  Walter Orr Roberts Lectureship – American Meteorological Society (AMS)
  • 2025  College of Engineering Researcher of the Year Award (U. Arizona)
  • 2025  Invitational Fellowship for Research in Japan –  Japan Society for the Promotion of Science (JSPS)
  • 2025  Fellow – American Association for the Advancement of Science (AAAS)
  • 2023  Joanne Simpson Medal – American Geophysical Union (AGU) 
  • 2023  Fellow – AGU 
  • 2023 Ambassador in Chemical Sciences in France – French National Centre for Scientific Research (CNRS)
  • 2023 NASA Group Achievement Award (3 times) – ACTIVATE Mission (2023), CAMP2Ex Mission (2020), and SEAC4RS Mission (2015)
  • 2022  College of Engineering Doctoral Dissertation Advisor Award (U. Arizona)
  • 2019  Ascent Award – AGU Atmospheric Sciences Section
  • 2010  Young Investigator Program Award – Office of Naval Research
     

Selected Publications

  • Beran, B., Siu, L. W., Choi, Y., DiGangi, J., Diskin, G. S., Thornhill, K. L., Pan, K., Arellano, A., and Sorooshian, A.: Stratospheric ozone intrusions over the northwest Atlantic: Multiseasonal cases from the ACTIVATE airborne mission, Atmospheric Environment, 122126, https://doi.org/10.1016/j.atmosenv.2026.122126, 2026.
  • Soltani, N., Mirrezaei, M. A., Arellano, A., Robinson, E. S., Fraser, M. P., Herckes, P., Hameed, Y., and Sorooshian, A.: Characteristics of common ozone exceedance days across the U.S. Intermountain west, Atmospheric Environment, 121982, https://doi.org/10.1016/j.atmosenv.2026.121982, 2026.
  • Lorenzo, G. R., Ziemba, L. D., Choi, Y., Crosbie, E. C., DiGangi, J. P., Diskin, G. S., Ferrare, R. A., Kirschler, S., Nowak, J. B., Shook, M. A., Thornhill, K. L., Voigt, C., Winstead, E. L., and Sorooshian, A.: Subsaturated aerosol hygroscopicity over the northwest Atlantic: Impacts of seasonal factors, offshore location, and clouds, Atmospheric Environment, 121662, https://doi.org/10.1016/j.atmosenv.2025.121662, 2026.
  • Gallo, F., Sorooshian, A., Ziemba, L., Betito, G., Corral, A. F., Crosbie, E., Edwards, E.-L., Hilario, M. R. A., Kirschler, S., Robinson, C., Shook, M. A., Thornhill, K. L., Voigt, C., Winstead, E., Zeider, K., and Moore, R.: Impact of shipping emission regulations on atmospheric vanadium along U.S. North Atlantic coast and over the western North Atlantic Ocean, Journal of Geophysical Research: Atmospheres, 131, e2025JD045004, https://doi.org/10.1029/2025JD045004, 2026.
  • Zhang, J., Painemal, D., Dror, T., Lim, J. S., Sorooshian, A., and Feingold, G.: Inferring processes governing cloud transition during mid-latitude marine cold-air outbreaks from satellite, Atmospheric Chemistry and Physics, 26, 6015-6034, 10.5194/acp-26-6015-2026, 2026.
  • Parakkat, L., Hilario, M. R. A., Mirrezaei, M. A., Robinson, E. S., Arellano, A., and Sorooshian, A.: Ozone concentrations and influential variables during heat waves over two desert cities in the Southwest U.S., Environmental Research Communications, 7, 125008, 10.1088/2515-7620/ae238d, 2025.
  • Schlosser, J. S., Dmitrovic, S., Bennett, R., Cairns, B., Chen, G., Diskin, G. S., Ferrare, R. A., Hair, J. W., Jones, M. A., Reid, J. S., Shingler, T. J., Shook, M. A., Sorooshian, A., Thornhill, K. L., Ziemba, L. D., and Stamnes, S.: Closing the gap: an algorithmic approach to reconciling in-situ and remotely sensed aerosol properties, Atmospheric Measurement Techniques, 18, 7187-7220, 10.5194/amt-18-7187-2025, 2025.
  • Ajayi, T., Choi, Y., Crosbie, E. C., DiGangi, J. P., Diskin, G. S., Kirschler, S., Moore, R. H., Shook, M. A., Thornhill, K. L., Voigt, C., Winstead, E. L., Ziemba, L. D., and Sorooshian, A.: Can a weekly cycle in pollutants be observed offshore the U.S. East Coast with airborne measurements?, ACS ES&T Air, 10.1021/acsestair.5c00291, 2025.
  • Betito, G., Banaga, P. A., Braun, R., Cambaliza, M. O., Cruz, M. T., MacDonald, A., Simpas, J. B., Stahl, C., and Sorooshian, A.: Day-night shifts in water-soluble ions of size-resolved aerosols before and after the COVID-19 lockdown in a coastal megacity: Metro Manila, Philippines, ACS Earth and Space Chemistry, https://doi.org/10.1021/acsearthspacechem.5c00192, 2025.
  • Soloff, C., Crosbie, E., Diskin, G. S., Gao, L., Kirschler, S., Lenhardt, E. D., Moore, R. H., Redemann, J.,  Shook, M. A., Tang, S., Thornhill, K. L., Voigt, C., Wang, H., Winstead, E. L., Ziemba, L. D., and Sorooshian, A.: Cloud condensation nuclei behavior and closure assessment for the northwest Atlantic Ocean, EST Air, https://doi.org/10.1021/acsestair.5c00151, 2025. 
  • Sorooshian, A., Siu, L. W., Butler, K., Brunke, M. A., Cairns, B., Chellappan, S., Chen, J., Choi, Y., Crosbie, E. C., Cutler, L., DiGangi, J. P., Diskin, G. S., Ferrare, R. A., Hair, J. W., Hostetler, C. A., Kirschler, S., Kleb, M. M., Li, X.-Y., Liu, H., McComiskey, A., Namdari, S., Painemal, D., Schlosser, J. S., Shingler, T., Shook, M. A., Silva, S., Sinclair, K., Smith, W. L., Soloff, C., Stamnes, S., Tang, S., Thornhill, K. L., Tornow, F., Tselioudis, G., Van Diedenhoven, B., Voigt, C., Vömel, H., Wang, H., Winstead, E. L., Xu, Y., Zeng, X., Zhang, B., Ziemba, L., and Zuidema, P.: The NASA ACTIVATE Mission, Bulletin of the American Meteorological Society, 106, E1517-E1538, https://doi.org/10.1175/BAMS-D-24-0136.1, 2025.
  • Crosbie, E., Hair, J. W., Nehrir, A. R., Ferrare, R. A., Hostetler, C., Shingler, T., Harper, D., Fenn, M., Collins, J., Barton-Grimley, R., Collister, B., Thornhill, K. L., Voigt, C., Kirschler, S., and Sorooshian, A.: A method to retrieve mixed-phase cloud vertical structure from airborne lidar, Atmospheric Measurement Techniques, 18, 2639-2658, 10.5194/amt-18-2639-2025, 2025.
  • Namdari, S., Ajayi, T., Choi, Y., Crosbie, E. C., DiGangi, J. P., Diskin, G. S., Kirschler, S., Liu, H., Nowak, J. B., Shook, M. A., Soloff, C., Thornhill, K. L., Voigt, C., Winstead, E. L., Zhang, B., Ziemba, L. D., and Sorooshian, A.: A comprehensive analysis of new particle formation across the northwest Atlantic: Analysis of ACTIVATE airborne data, Atmospheric Environment, 338, 120831, https://doi.org/10.1016/j.atmosenv.2024.120831, 2024.
  • Sorooshian, A., Arellano, A. F., Fraser, M. P., Herckes, P., Betito, G., Betterton, E. A., Braun, R. A., Guo, Y., Mirrezaei, M. A., and Roychoudhury, C.: Ozone in the desert southwest of the United States: A synthesis of past work and steps ahead, ACS ES&T Air, 10.1021/acsestair.3c00033, 2024.