Ph.D., Department of Geophysics, Peking University, 1994
M.S., Center for Environmental Sciences, Peking Univeresity, 1987
B.S., Department of Geophysics, Peking University, 1984

2007–present, Professor, College of Environmental Sciences and Engineering, Peking University
1995–2007, Associate Professor, Center for Environmental Sciences/College of Environmental Sciences, Peking University
1989–1995, Lecturer, Center for Environmental Sciences, Peking University
1987–1989, Teaching Assistant, Center for Environmental Sciences, Peking University

Graduate course: Air Pollution Meteorology
Undergraduate course: Introduction to Meteorology

Air pollution modeling; Boundary layer meteorology and atmospheric diffusion; Meso-scale meteorology

1. Cai XH, Chen JY, Desjardins RL, Flux footprints in the convective boundary layer: large eddy simulation and Lagrangian stochastic modelling, Boundary-Layer Meteorol, 2010, 137, 31–47. 
2. Peng GL, Cai XH, Zhang HS, Li AG, Hu F and Leclerc MY, Heat flux apportionment to heterogeneous surfaces using flux footprint analysis, Advance in Atmospheric Sciences, 2008, 25(1), 107–116
3. Cai XH, Peng GL, Guo XF and Leclerc MY, Evaluation of backward and forward Lagrangian footprint models in the surface layer, Theor. Appl. Climat., 2008, 93: 207–223. 
4. Cai XH and Leclerc MY, Forward-in-time and backward-in-time dispersion in the convective boundary layer: the concentration footprint, Boundary-Layer Meteorol., 2007, 123, 201–218.
5. Cai XH, Song Y, Zhu T, Lin W and Kang L, Glacier winds in the Rongbuk Valley, north of Mount Everest:2. Their role in vertical exchange processes, J. Geophys. Res., 2007, 112, D11102.
6. Cai XH, Zhang R and Li Y, A Large eddy simulation and Lagrangian stochastic Study of Heavy Particle Dispersion in the Convective Boundary Layer, 2006, Boundary-Layer Meteorol., 120, 413–435.
7. Guo XF, Cai XH, Footprint Characteristics for Scalar Concentration in the Convective Boundary Layer, Advance in Atmospheric Sciences, 2005, 22(6), 821–830.
8. Cai XH and Chen JY, Geostrophically forced flows and momentum transfer in heterogeneous convective boundary layers, Chinese Journal of Atmospheric Sciences, 2003, 27(2):156–164. 

1. Three dimensional WINd field DIAgnostic Model (WINDIAM), Register No: 2009SR026181
2. Random walk Particle-Puff atmospheric dispersion Model (RPPM), Register No: 2009SR026180

1. Hu EB, Chen JY, Lei XE, Sun CZ, Chen ZZ, Yao RT, Han ZW, Cai XH, Yu JG, Zhang MS, Wang SS, Gao ZR, Yan JY, Wang SX, Qiao QD, Experimental and theoretic research for atmospheric diffusion of nuclear power plants, 1st class award of Science and Technology, from National Industrial Committee of Defense Science and Technology, 2000.
2. Han SQ, Jin TS, Cai XH, Li PY, Pan SJ, Air pollution diagnosis and assessment based on weather forecast and atmospheric dispersion models for incidental releases, 3rd class award for Science and technology Progress, Tianjin Municipality, 2010.

His research focuses on numerical simulation of atmospheric turbulence and dispersion. He is also interested in questions related to meso-scale atmospheric circulation, atmospheric boundary layer structure, and land-atmosphere interaction. He developed a large-eddy simulation code in early years to simulate convective boundary layer and its turbulence properties over heterogeneous surfaces. He also developed a Lagrangian stochastic dispersion model to demonstrate the dispersion process of air pollutants, and to trace back the influential area (source area) of a specified monitoring site. He also participated in a few engineering projects for environmental assessment for nuclear power plants.