Research Subjects: 1. Boundary Layer Meteorology: Turbulent transport and diffusion processes Land-air energy exchange processes Boundary layer development Large eddy simulation Afternoon shower storms/locally induced precipitation Land-sea breeze/mountain-valley wind over complicated topography 2. Air Quality Modeling (Community Multiscale Air Quality Modeling): Impact of meteorological process on the air pollution dispersion Ozone/Aerosol Source-receptor relationship and source apportionment Emission control strategy 3. Land Surface Hydrometeorology Land surface energy exchanging processes Surface evapotranspiration processes Surface and subsurface run-off processes Long-term impact on regional climate