Dr. Thorsten Hohaus

since 2014 Senior Scientist and head of group Aerosol Chemistry at the ICE-3: Troposphere, Forschungszentrum Jülich

2010-2013 Postdoctoral researcher, Aerodyne Research Inc., Billerica, USA
2009 Postdoctoral researcher, ICG-2, Forschungszentrum Jülich
2009 Ph.D. (magna cum laude) in physics at the University of Wuppertal

2006-2009 PhD student, ICG-2, Forschungszentrum Jülich

2005 Diploma (grade 1.7) in Physics from Rheinische-Friedrich-Wilhelms University Bonn

1996-2005 Studies of physics, Rheinische-Friedrich-Wilhelms University Bonn

Selected Publications

Utinger, B., Barth, A., Paul, A., Mukherjee, A., Campbell, S. J., Müller, C.-M., … Fang, Z. (2025). Emission dynamics of reactive oxygen species and oxidative potential in particles from a petrol car and wood stove. Aerosol Research, 3(1), 205–218.

Paul, A., Kokkola, T., Fang, Z., Ihalainen, M., Czech, H., Etzien, U., … Buchholz, B. (2025). The impact of photochemical aging on secondary aerosol formation from a marine engine. Npj Climate and Atmospheric Science, 8(1), 106.

Offer, S., Di Bucchianico, S., Czech, H., Pardo, M., Pantzke, J., Bisig, C., … Oeder, S. (2024). The chemical composition of secondary organic aerosols regulates transcriptomic and metabolomic signaling in an epithelial-endothelial in vitro coculture. Particle and Fibre Toxicology, 21(1), 38.

Liu, L., Hohaus, T., Franke, P., Lange, A. C., Tillmann, R., Fuchs, H., … He, Q. (2024a). Observational evidence reveals the significance of nocturnal chemistry in seasonal secondary organic aerosol formation. NPJ Climate and Atmospheric Science, 7(1), 207.

Czech, H., Yli-Pirilä, P., Tiitta, P., Ihalainen, M., Hartikainen, A., Schneider, E., … Rüger, C. P. (2024). The effect of aging conditions at equal OH exposure in an oxidation flow reactor on the composition of toluene-derived secondary organic aerosols. Environmental Science: Atmospheres, 4(7), 718–731.

Paul, A., Fang, Z., Martens, P., Mukherjee, A., Jakobi, G., Ihalainen, M., … Hohaus, T. (2024). Formation of secondary aerosol from emissions of a Euro 6d-compliant gasoline vehicle with a particle filter. Environmental Science: Atmospheres, 4(7), 802–812.

Wieser, F., Sander, R., Cho, C., Fuchs, H., Hohaus, T., Novelli, A., … Taraborrelli, D. (2024). Development of a multiphase chemical mechanism to improve secondary organic aerosol formation in CAABA/MECCA (version 4.7. 0). Geoscientific Model Development, 17(10), 4311–4330.

Baker, Y., Kang, S., Wang, H., Wu, R., Xu, J., Zanders, A., … Geretti, V. (2024). Impact of HO 2/RO 2 ratio on highly oxygenated α-pinene photooxidation products and secondary organic aerosol formation potential. Atmospheric Chemistry and Physics, 24(8), 4789–4807.

Bell, D., Doussin, J.-F., & Hohaus, T. (2023). Preparation of simulation chambers for experiments. In A practical guide to atmospheric simulation chambers (pp. 113–127). Springer International Publishing Cham.

Carlsson, P. T. M., Vereecken, L., Novelli, A., Bernard, F., Brown, S. S., Brownwood, B., … Edwards, P. M. (2023). Comparison of isoprene chemical mechanisms under atmospheric night-time conditions in chamber experiments: evidence of hydroperoxy aldehydes and epoxy products from NO 3 oxidation. Atmospheric Chemistry and Physics, 23(5), 3147–3180.

Pardo, M., Czech, H., Offer, S., Sklorz, M., Di Bucchianico, S., Hartner, E., … Ziehm, T. (2023). Atmospheric aging increases the cytotoxicity of bare soot particles in BEAS-2B lung cells. Aerosol Science and Technology, 57(5), 367–383.

Cho, C., Fuchs, H., Hofzumahaus, A., Holland, F., Bloss, W. J., Bohn, B., … Liu, L. (2023). Experimental chemical budgets of OH, HO 2, and RO 2 radicals in rural air in western Germany during the JULIAC campaign 2019. Atmospheric Chemistry and Physics, 23(3), 2003–2033.

Pardo, M., Offer, S., Hartner, E., Di Bucchianico, S., Bisig, C., Bauer, S., … Binder, S. (2022). Exposure to naphthalene and β-pinene-derived secondary organic aerosol induced divergent changes in transcript levels of BEAS-2B cells. Environment International, 166, 107366.

Tan, Z., Fuchs, H., Hofzumahaus, A., Bloss, W. J., Bohn, B., Cho, C., … Liu, L. (2022). Seasonal variation in nitryl chloride and its relation to gas-phase precursors during the JULIAC campaign in Germany. Atmospheric Chemistry and Physics, 22(19), 13137–13152.

Hartner, E., Paul, A., Käfer, U., Czech, H., Hohaus, T., Gröger, T., … Jeong, S. (2022). On the complementarity and informative value of different electron ionization mass spectrometric techniques for the chemical analysis of secondary organic aerosols. ACS Earth and Space Chemistry, 6(5), 1358–1374.

Offer, S., Hartner, E., Di Bucchianico, S., Bisig, C., Bauer, S., Pantzke, J., … Kuhn, E. (2022). Effect of atmospheric aging on soot particle toxicity in lung cell models at the air–liquid interface: differential toxicological impacts of biogenic and anthropogenic secondary organic aerosols (SOAs). Environmental Health Perspectives, 130(2), 027003.

Franco, B., Blumenstock, T., Cho, C., Clarisse, L., Clerbaux, C., Coheur, P.-F., … Emmerichs, T. (2021). Ubiquitous atmospheric production of organic acids mediated by cloud droplets. Nature, 593(7858), 233–237.

Brownwood, B., Turdziladze, A., Hohaus, T., Wu, R., Mentel, T. F., Carlsson, P. T. M., … Hantschke, L. (2021). Gas-particle partitioning and SOA yields of organonitrate products from NO3-initiated oxidation of isoprene under varied chemical regimes. ACS Earth and Space Chemistry, 5(4), 785–800.

Wu, R., Vereecken, L., Tsiligiannis, E., Kang, S., Albrecht, S. R., Hantschke, L., … Tillmann, R. (2021). Molecular composition and volatility of multi-generation products formed from isoprene oxidation by nitrate radical. Atmospheric Chemistry and Physics, 21(13), 10799–10824.

Gkatzelis, G. I., Papanastasiou, D. K., Karydis, V. A., Hohaus, T., Liu, Y., Schmitt, S. H., … Chen, Q. (2021). Uptake of water‐soluble gas‐phase oxidation products drives organic particulate pollution in Beijing. Geophysical Research Letters, 48(8), e2020GL091351.

Wang, Yu, Chen, Y., Wu, Z., Shang, D., Bian, Y., Du, Z., … Schlag, P. (2020a). Mutual promotion between aerosol particle liquid water and particulate nitrate enhancement leads to severe nitrate-dominated particulate matter pollution and low visibility. Atmospheric Chemistry and Physics, 20(4), 2161–2175.

Lu, K., Fuchs, H., Hofzumahaus, A., Tan, Z., Wang, H., Zhang, L., … Broch, S. (2019). Fast photochemistry in wintertime haze: consequences for pollution mitigation strategies. Environmental Science & Technology, 53(18), 10676–10684.

Saarikoski, S., Williams, L. R., Spielman, S. R., Lewis, G. S., Eiguren-Fernandez, A., Aurela, M., … Jayne, J. T. (2019). Laboratory and field evaluation of the Aerosol Dynamics Inc. concentrator (ADIc) for aerosol mass spectrometry. Atmospheric Measurement Techniques, 12(7), 3907–3920.

Mentel, T. F., Kleist, E., Andres, S., Dal Maso, M., Hohaus, T., Kiendler-Scharr, A., … Uerlings, R. (2013). Secondary aerosol formation from stress-induced biogenic emissions and possible climate feedbacks. Atmospheric Chemistry and Physics, 13(17), 8755–8770.

Mentel, T. F., Wildt, J., Kiendler-Scharr, A., Kleist, E., Tillmann, R., Dal Maso, M., … Uerlings, R. (2009). Photochemical production of aerosols from real plant emissions. Atmospheric Chemistry and Physics, 9(13), 4387–4406.

Gkatzelis, G. I., Hohaus, T., Tillmann, R., Gensch, I., Müller, M., Eichler, P., … Yu, Z. (2018). Gas-to-particle partitioning of major biogenic oxidation products: a study on freshly formed and aged biogenic SOA. Atmospheric Chemistry and Physics, 18(17), 12969–12989.

Kiendler-Scharr, A., Hohaus, T., Kleist, E., Miebach, M., Tillmann, R., Uerlings, R., … Dinar, E. (n.d.). Secondary organic aerosol formation from plant emissions: overview of the Jülich Plant chamber experiments. Journal of Aerosol Science, 35(2), 143–176.

Maso, M., Mentel, T., Kiendler-Scharr, A., Hohaus, T., Kleist, E., Miebach, M., … Griffiths, P. (2007). Aerosol Formation from Plant Emissions: The Jülich Plant Chamber Experiments. Nucleation and Atmospheric Aerosols, 924–927.

Hohaus, T., Kuhn, U., Andres, S., Kaminski, M., Rohrer, F., Tillmann, R., … Kiendler-Scharr, A. (2016). A new plant chamber facility, PLUS, coupled to the atmosphere simulation chamber SAPHIR. Atmospheric Measurement Techniques, 9(3), 1247–1259.

Gkatzelis, G. I., Tillmann, R., Hohaus, T., Müller, M., Eichler, P., Xu, K.-M., … Kaminski, M. (2018). Comparison of three aerosol chemical characterization techniques utilizing PTR-ToF-MS: a study on freshly formed and aged biogenic SOA. Atmospheric Measurement Techniques, 11(3), 1481–1500.

Hunter, J. F., Day, D. A., Palm, B. B., Yatavelli, R. L. N., Chan, A. W. H., Kaser, L., … Carrasquillo, A. J. (2017). Comprehensive characterization of atmospheric organic carbon at a forested site. Nature Geoscience, 10(10), 748–753.

Martinez, R. E., Williams, B. J., Zhang, Y., Hagan, D., Walker, M., Kreisberg, N. M., … Worsnop, D. R. (2016). Development of a volatility and polarity separator (VAPS) for volatility-and polarity-resolved organic aerosol measurement. Aerosol Science and Technology, 50(3), 255–271.

Kiendler-Scharr, Astrid, Zhang, Q., Hohaus, T., Kleist, E., Mensah, A., Mentel, T. F., … Wildt, J. (2009). Aerosol mass spectrometric features of biogenic SOA: Observations from a plant chamber and in rural atmospheric environments. Environmental Science & Technology, 43(21), 8166–8172.

Isaacman, Gabriel, Wilson, K. R., Chan, A. W. H., Worton, D. R., Kimmel, J. R., Nah, T., … Worsnop, D. R. (2012). Improved resolution of hydrocarbon structures and constitutional isomers in complex mixtures using gas chromatography-vacuum ultraviolet-mass spectrometry. Analytical Chemistry, 84(5), 2335–2342.

Williams, B. J., Jayne, J. T., Lambe, A. T., Hohaus, T., Kimmel, J. R., Sueper, D., … Martinez, R. E. (2014). The first combined thermal desorption aerosol gas chromatograph—aerosol mass spectrometer (TAG-AMS). Aerosol Science and Technology, 48(4), 358–370.

Kiendler-Scharr, Astrid, Wildt, J., Maso, M. D., Hohaus, T., Kleist, E., Mentel, T. F., … Wahner, A. (2009). New particle formation in forests inhibited by isoprene emissions. Nature, 461(7262), 381–384.

Hohaus, Thorsten, Gensch, I., Kimmel, J., Worsnop, D. R., & Kiendler-Scharr, A. (2015). Experimental determination of the partitioning coefficient of β-pinene oxidation products in SOAs. Physical Chemistry Chemical Physics, 17(22), 14796–14804.

Chan, A. W. H., Kreisberg, N. M., Hohaus, T., Campuzano-Jost, P., Zhao, Y., Day, D. A., … Teng, A. P. (2016). Speciated measurements of semivolatile and intermediate volatility organic compounds (S/IVOCs) in a pine forest during BEACHON-RoMBAS 2011. Atmospheric Chemistry and Physics, 16(2), 1187–1205.