Alex (Li) Zhang

Alex (Li) Zhang

  • Assistant Research Professor
405 Walker Building
University Park, PA 16802


Ph.D., Hong Kong Polytechnic University (Hong Kong PhD Fellowship Awardee)
B.S.&M.S., Nanjing University 

Work Experience
Postdoc, Princeton University/NOAA GFDL (2017-2019)

Research interest 
My researches focus on tropospheric air pollutants (ozone, particulates, and greenhouse gases) and the interactions between air pollutants and meteorology. I use a combination of measurements and state-of-the-art regional and global models to investigate how important species of trace gases/aerosols are emitted, transformed, and transported within our atmosphere. 


  • Zhang, L., Davis, K. J., Schuh, A. E., Jacobson A. R., et al., (2022). Multi-Season Evaluation of CO2 Weather in OCO-2 MIP Models. Journal of Geophysical Research: Atmospheres, 127(2), e2021JD035457.
  • Cui, Y. Y., Zhang, L., Davis, K.J., et al., (2022), Evaluating global atmospheric inversions of terrestrial net ecosystem exchange CO2 over North America on seasonal and sub-continental scales, Geophysical Research Letters, 49, e2022GL100147.
  • Zhang, L. and Cui, Y. Y. (2022). Tropospheric ozone inter-annual variabilities, trends, and extremes in CCMI models, Atmospheric Environment, 269(15), 118841.
  • Langford, A. O., Senff, C. J., …. and Zhang, L. (2022). The Fires, Asian, and Stratospheric Transport-Las Vegas Ozone Study (FAST-LVOS), Atmospheric Chemistry and Physics, 22, 1707–1737.
  • Cui, Y. Y., Jacobson, A. R., Feng, S., Wesloh, D., Barkley, Z. R., Zhang, L., et al. (2021), Evaluation of CarbonTracker's Inverse Estimates of North American Net Ecosystem Exchange of CO2 from Different Observing Systems Using ACT-America Airborne Observations, Journal of Geophysical Research: Atmospheres, 126(12), e2020JD034406.
  • DeLang, MN, Becker, J.S., Chang, K.L., … Zhang, L., et al., (2021). Mapping Yearly Fine Resolution Global Surface Ozone through the Bayesian Maximum Entropy Data Fusion of Observations and Model Output for 1990–2017, Environmental Science & Technology. 2021, 55, 8, 4389–4398.
  • Zhang, L., Lin, M., Langford, A.O., Horowitz, L.W., et al., (2020). Characterizing sources of high surface ozone in the Southwest U.S. with intensive field measurements and two global models, Atmospheric Chemistry and Physics, 20, 10379–10400.
  • Li, Q., Badia, A., Wang, T., Sarwar, G., Fu, X., Zhang, L., et al. (2020). Potential effect of halogens on atmospheric oxidation and air quality in china. Journal of Geophysical Research: Atmospheres, 125,e2019JD032058.
  • Fu, X., Wang, T., Zhang, L., et al., (2019). Significant contribution of HONO to secondary pollutants during a severe winter pollution event in southern China. Atmospheric Chemistry and Physics, 19: 1-14. (top 1% most-cited article published in Geosciences in 2019)
  • Li, Q., Zhang, L., Wang, T., et al., (2018). “New” Reactive Nitrogen Chemistry reshapes the relationship of Ozone to Its Precursors. . Environmental Science & Technology, 52 (5): 2810–2818.
  • Lefohn, A.S., Malley, C.S., Mills, G., Smith, L., Hazucha, M., Naik, V., Schultz, M.G., Simon, H., Wells B., De Marco, A., Xu, X., Zhang, L., et al., (2018). Tropospheric ozone assessment report: Global ozone metrics for climate change, human health, and crop/ecosystem research, Elementa: Science of the Anthropocene, 6(1). (top 1% most-cited article published in Geosciences in 2018)
  • Zhang, L., Li, Q., Wang, T., Ahmadov, R., Zhang, Q., et al., (2017). Combined impacts of nitrous acid and nitryl chloride on lower-tropospheric ozone: new module development in WRF-Chem and application to China. Atmospheric Chemistry and Physics, 17, 9733-9750.
  • Yun, H., Wang, Z., Zha, Q., Wang, W., Xue, L., Zhang, L., et al., (2017). Nitrous acid in a street canyon environment: Sources and contributions to local oxidation capacity. Atmospheric Environment, 167: 223-234.
  • Wang, T., Xue, L., Brimblecombe, P., Lam, Y.F., Li L., Zhang, L., (2017). Ozone pollution in China: A review of concentrations, meteorological influences, chemical precursors, and effects, Science of the Total Environment, 575:1582-1596. (top 0.10% most-cited article in Geosciences in 2017)
  • Lefohn, A.S., Malley, C.S., Simon, H., Wells B., Xu, X., Zhang, L., et al., (2017). Responses of human health and vegetation exposure metrics to changes in ozone concentration distributions associated with changing emissions patterns in the European Union, United States, and China. Atmospheric Environment, 152:123-145.
  • Wang, T., Liang, Y., Zha, Q., Zhang, L., et al. (2017), Photochemical Smog in Southern China: A Synthesis of Observations and Model Investigations of the Sources and Effects of Nitrous Acid, in Air Pollution in Eastern Asia: An Integrated Perspective, edited by I. Bouarar, Wang, X. & Brasseur, G. P., pp. 69-85, Springer,
  • Zhang, L., Wang, T., Zhang, Q., et al., (2016). Potential sources of nitrous acid (HONO) and their impacts on ozone: A WRF-Chem study in a polluted subtropical region. Journal of Geophysical Research: Atmospheres, 121: 3645-3662. (top 1% most-cited article published in Geosciences in 2016)
  • Li, Q., Zhang, L., Wang, T., et al., (2016). Impacts of heterogeneous uptake of dinitrogen pentoxide and chlorine activation on ozone and reactive nitrogen partitioning: Improvement and application of WRF-Chem model in southern China, Atmospheric Chemistry and Physics, 16: 1-16.
  • Zhang, L., Wang, T., Lv, M., Zhang, Q., (2015). On the severe haze in Beijing during January 2013: Unraveling the effects of meteorological anomalies with WRF-Chem. Atmospheric Environment, 104: 11-21. (top 1% most-cited article published in Geosciences in 2015)
  • Liu, H. and Zhang, L., (2012). Climate effects of anthropogenic aerosols over China under different emissions scenarios, Chinese Journal of Geophysics, 55(6): 1867-1875.
  • Zhang, L., Liu, H. and Zhang, N., (2011). Impacts of internally and externally mixed anthropogenic sulfate and carbonaceous aerosols on East Asian climate, Acta Meteorologica Sinica, 25(5): 639-658.
  • Liu, H., Zhang, and Wu, J., (2010). A modeling study of climate effect of sulfate and carbonaceous aerosols over China, Advances in Atmospheric Sciences, 27(6): 1276-1288.