WU, Zhijun

WU, Zhijun

Assistant Professor
Department: Environmental Science
Research interests: Atmospheric chemistry
Tel/fax: 86-10-62754082
E-mail: zhijunwu@pku.edu.cn


Ph.D., Environmental Science, Peking University, 2007
B.A., Environmental Science, Jilin University, 2001


2013–present, Assistant Professor, Peking University
2007–2013, Postdoc Research Fellow, Leibniz Institute for Tropospheric Research, Germany


Atmospheric nucleation and growth; Particle volatility and hygroscopicity


1. Wu Z.J., Poulain L., Henning S., Dieckmann K., Birmili W., Merkel M., van Pinxteren D., Spindler G., Müller K., Stratmann F., Herrmann H., and Wiedensohler A. Relating particle hygroscopicity and CCN activity to chemical composition during the HCCT-2010 field campaign. Atmos. Chem. Phys., 13, 7983-7996, doi: 10.5194/acp-13-7983-2013, 2013.
2. Wu Z.J., Birmili W., Poulain L., Wang Z.B., Merkel M., Fahlbusch B., van Pinxteren D., Herrmann H., and Wiedensohler A. Particle hygroscopicity during atmospheric new particle formation events: implications for the chemical species contributing to particle growth. Atmos. Chem. Phys., 13, 6637-66463, 2013.
3. Wu Z.J., Nowak A., Poulain L., Herrmann H., and Wiedensohler A. Hygroscopic behavior of atmospherically relevant water-soluble carboxylic salts and their influence on the water uptake of ammonium sulfate. Atmos. Chem. Phys., 11, 12617-12626, 2011.
4. Wu Z.J., Hu M., Yue D., Wehner B., and Wiedensohler A. Evolution of particle number size distribution in an urban atmosphere during episodes of heavy pollution and new particle formation. Science China Earth Sciences, 54, 1772-1778, 2011.
5. Wu Z.J., Hu M., Shao K., and Slanina J. Acidic gases, nh3 and secondary inorganic ions in pm10 during summertime in beijing, china and their relation to air mass history. Chemosphere, 76, 1028-1035, 2009.
6. Wu Z.J., Poulain L., Wehner B., Wiedensohler A., and Herrmann H. Characterization of the volatile fraction of laboratory-generated aerosol particles by Thermo denuder-aerosol mass spectrometer coupling experiments, Journal of Aerosol Science, 40, 603-612, 2009.
7. Wu Z.J., Cheng Y. F., Hu M., Wehner B., Sugimoto N., and Wiedensohler A. Dust events in Beijing, china (2004–2006): Comparison of ground-based measurements with columnar integrated observations. Atmos. Chem. Phys., 9, 6915-6932, 2009.
8. Wu Z.J., Hu M., Lin P., Liu S., Wehner B., and Wiedensohler A.: Particle number size distribution in the urban atmosphere of Beijing, china, Atmospheric Environment, 42, 7967-7980, 2008.
9. Hu M., Wu Z.J., Slanina J., Lin P., Liu S., and Zeng L. Acidic gases, ammonia and water-soluble ions in pm2.5 at a coastal site in the pearl river delta, china. Atmospheric Environment, 42, 6310-6320, 2008.
10. Wu Z.J., Hu M., Liu S., Wehner B., Bauer S., Ma ßling A., Wiedensohler A., Petäjä T., Dal Maso M., and Kulmala M. New particle formation in Beijing, china: Statistical analysis of a 1-year data set. J. Geophys. Res., 112, D09209, 2007.


Dr. Wu’s researches focus on atmospheric nucleation, particle hygroscopicity and volatility as well as CCN activity. From 2001 to 2007, his work focused on new particle formation in polluted urban atmosphere. His new finding suggested that new particle formation event can occur frequently in polluted atmosphere besides clean atmosphere reported previously by other researchers. His studies extended our understanding of particle formation and growth in polluted urban atmosphere (Just for this topic, four first-author and four co-author papers have been published in international journals). In 2008, he shifted research focus towards particle volatility and hygroscopicity. One of his study is to investigate the effects of chemical aging on volatility and water up-taking ability of wood combustion aerosols. Another project is to study the contribution of organics to hygroscopic growth of submicron particles in the Atlantic marine boundary layer. Meanwhile, he developed a new method to couple thermo-denuder and aerosol mass spectrometer to study secondary organic formation. One of his research findings is to find an unusually high soluble particle fraction in the newly formed particles and the formation of additional water-soluble particulate matter which are imperative to explain the missing soluble fraction except for sulfuric acid.