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I started my research career in 1985 and have more than 30 years of research experience in academia, governmental laboratories, industry, and international collaborations. My research interests include air pollution modeling and assessment, atmospheric chemistry and transport, cloud/aerosol chemistry and microphysics, sensitivity and uncertainty analysis, interactions among chemistry, meteorology, and climate change, and earth system modeling.  My research is at the interface of Earth system sciences that crosses traditional disciplinary boundaries including the nexus among human, energy, air, water, forest, ocean, and soil. Over the years, I have worked on a number of three-dimensional atmospheric models at urban, regional, and global scales including STEM III, GChM, MIRAGE, SCICHEM, CMAQ, CMAQ-MADRID, CAMx, MM5, WRF, and mesoscale and global-through-urban WRF/Chem, WRF/Chem-MADRID, WRF-CAM5, and CESM/CAM5.  My research advances the scientific understanding of major atmospheric and environmental issues by developing and utilizing numerical models and analysis tools at various scales (from local to global) to address relevant science and policy questions pertaining to controlling air pollution, mitigating adverse climate change and human health, and minimizing environmental damages in the entire Earth system. It has produced 156 peer-reviewed journal publications, 163 conference papers and technical reports, and  464 conference presentations and invited seminars.  I teach three courses on Atmospheric Chemistry and Air Quality and have supervised 16 postdocs and graduated 7 PhD students and 11 MS students, and also hosted 27 international visitors.

Research Description

My research focuses on the development, improvement, and evaluation of the state-of-the-science numerical models for simulating human-induced air pollution and its impact on human health, climate, eco-environment, and society. It spans urban to global, expands from air quality to human health/climate change/Earth system, and covers retrospective, nowcasting, and forecasting applications. Using an interdisciplinary research approach, we apply our models with advanced representations of chemical, physical, and meteorological processes in the atmosphere/Earth system in the U.S. and other areas in the world on multiple scales to solve the most pressing and challenging environment- and energy-related scientific and technical issues including air and water pollution, acid deposition, ecosystem degradation, global warming and other adverse anthropogenic climate change, as well as associated adverse human health.


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Ph. D., Chemical and Biochemical Engineering, University of Iowa (1994)
B.S., Environmental Engineering, Tsinghua University (1988)

Research Locations and Collaborations