Paul Ziemann
Professor • Institute Fellow, CIRES
Chemistry • Cooperative Institute for Research in Environmental Sciences (CIRES)

Office: Cristol 434


Ph.D.: Penn State, 1991

Areas of Expertise

Aerosols & Clouds, Instrument Development, Trace Gases & Radicals, Environmental Chemistry, Atmospheric/Astrochemistry

Awards and Honors

2001 Kenneth T. Whitby Award, American Association for Aerosol Research

The primary focus of our group's research is to elucidate mechanisms by which volatile organic compounds emitted from biogenic and anthropogenic sources react in the atmosphere to form products that can create submicron-size organic aerosol particles. These reactions are complex and include photochemistry, gas-phase oxidation, and heterogeneous/multiphase reactions. The resulting particles affect global climate, visibility, and human health. We conduct experiments in large-volume environmental chambers under simulated atmospheric conditions and then identify and quantify organic gas and aerosol reaction products using a variety of analytical instruments and methods. This information is used to develop detailed, quantitative chemical reaction mechanisms for predicting organic aerosol formation, which can be used to improve air quality and global climate models.

  • Aimanant, S., Ziemann, P.J., 2013. Chemical mechanisms of aging of aerosol formed from the reaction of n-pentadecane with OH radicals in the presence of NOx. Aerosol Science and Technology, 47, 979-990.
  • Strollo, C.M., Ziemann, P.J., 2013. Products and mechanism of secondary organic aerosol formation from the reaction of 3-methylfuran with OH radicals in the presence of NOx. Atmospheric Environment, 77, 534-543.
  • Yeh, G.K., Ziemann, P.J., 2014. Alkyl nitrate formation from the reactions of C8−C14 n‑alkanes with OH radicals in the presence of NOx:
  • Measured yields with essential corrections for gas−wall partitioning. Journal of Physical Chemistry A, 118, 8147-8157.
  • Suda, S.R., Petters, M.D., Yeh, G.K., Strollo, C.S., Matsunaga, A., Faulhaber, A., Ziemann, P.J., Prenni, A.J., Carrico, C.M., Sullivan, R.C., Kreidenweis, S.M. 2014. Influence of functional groups on organic aerosol cloud condensation nucleus activity. Environmental Science and Technology, 48, 10182–10190.
  • Yeh, G.K., Ziemann, P.J., 2014. Identification and yields of 1,4-hydroxynitrates formed from the reactions of C8−C16 n‑alkanes with OH radicals in the presence of NOx. Journal of Physical Chemistry A, 118, 8797-8806.
  • Yeh, G. K., Ziemann, P.J., 2015. Gas-wall partitioning of oxygenated organic compounds: Measurements, structure–activity relationships, and correlation with gas chromatographic retention factor. Aerosol Science and Technology, 49, 726-737.
  • Yeh, G.K., Claflin, M.S., Ziemann, P.J., 2015. Products and mechanism of the reaction of 1‑pentadecene with NO3 radicals and the effect of a −ONO2 group on alkoxy radical decomposition. Journal of Physical Chemistry A, 119, 10684-10696.
  • Strollo, C.M., Ziemann, P.J., 2016. Investigation of the formation of benzoyl peroxide, benzoic anhydride, and other potential aerosol products from gas-phase reactions of benzoylperoxy radicals.
  • Atmospheric Environment, 130, 202–210.
  • Ranney, A.P., Ziemann, P.J., 2016. Microscale spectrophotometric methods for quantification of functional groups in oxidized organic aerosol. Aerosol Science and Technology, 50, 881–892.
  • Ranney, A.P., Ziemann, P.J., 2016. Kinetics of acid-catalyzed dehydration of cyclic hemiacetals in aerosol particles in equilibrium with nitric acid vapor. Journal of Physical Chemistry A, 120, 2561–2568.
  • Krechmer, J.E., Pagonis, D., Ziemann, P.J., Jimenez, J.L., 2016. Quantification of gas-wall partitioning in teflon environmental chambers using rapid bursts of low-volatility oxidized species generated in situ. Environmental Science and Technology, 50, 5757–5765.
  • Algrim, L.B., Ziemann, P.J., 2016. Effect of the keto group on yields and composition of organic aerosol formed from OH radical-initiated reactions of ketones in the presence of NOx. Journal of Physical Chemistry A, 120, 6978–6989.
  • Liu, S., Li, R., Wild, R.J., Warneke, C., de Gouw, J.A., Brown, S.S., Miller, S.L., Luongo, J.C., Jimenez, J.L., Ziemann, P.J., 2016.Contribution of human-related sources to indoor volatile organic compounds in a university classroom. Indoor Air, 925–938.Ranney, A.P., Ziemann, P.J., 2017. Identification and quantification of oxidized organic aerosol compounds using derivatization, liquid chromatography, and chemical ionization mass spectrometry. Aerosol Science and Technology, 51, 342–33.
  • Liu, S., Thompson, S.L., Stark, H., Ziemann, P.J., Jimenez, J.L., 2017. Gas-phase carboxylic acids in a university classroom: abundance, variability, and sources. Environmental Science and Technology, 51, 5454–5463.
  • Krechmer, J.E., Day, D.A., Ziemann, P.J., Jimenez, J.L., 2017. Direct measurements of gas/particle partitioning and mass accommodation coefficients in environmental chambers. Environmental Science and Technology, 51, 11867–11876.
  • Petters, S.S., Pagonis, D., Claflin, M.S., Levin, E.J.T., Petters, M.D., Ziemann, P.J., Kreidenweis, S.M., 2017. Hygroscopicity of organic compounds as a function of carbon chain length and carboxyl, hydroperoxy, and carbonyl functional groups. Journal of Physical Chemistry A, 121, 5164–5174.
  • Liu, J., Russell, L.M., Lee, A.K.Y., McKinney, K.A., Surratt, J.D., Ziemann, P.J., 2017. Observational evidence for pollution-influenced selective uptake contributing to biogenic secondary organic aerosols in the southeastern U.S. Geophysical Research Letters, 44, 8056–8064, doi:10.1002/2017GL074665.
  • Pagonis, D., Krechmer, J.E., de Gouw, J., Jimenez, J.L, Ziemann, P.J., 2017. Effects of gas–wall partitioning in Teflon tubing and instrumentation on time-resolved measurements of gas-phase organic compounds. Atmospheric Measurement Techniques, 10, 4687–4696.
  • Finewax, Z., de Gouw, J.A., Ziemann, P.J., 2018. Identification and quantification of 4-nitrocatechol formed from OH and NO3 radical-initiated reactions of catechol in air in the presence of NOx:
  • Implications for secondary organic aerosol formation from biomass burning. Environmental Science and Technology, 52, 1981–1989.
  • Claflin, M.S., Ziemann, P.J., 2018. Identification and quantitation of aerosol products of the reaction of β-pinene with NO3 radicals and implications for gas- and particle-phase reaction mechanisms. Journal of Physical Chemistry A, 122, 3640–3652.