I mainly work with regional climate model simulations, trying to understand how the climate system might change under increasing anthropogenic greenhouse gases over the western US, and investigate what are the physical mechanisms driving these change, by looking at interactions between the complex topography, and surface and large-scale circulations. I am especially interested in looking at the hydroclimate change. Because any potential changes might create problems in water-stressed arid zones as well as adding to flooding hazards in some other regions, causing havoc in agriculture, ecosystems, human lives, etc., thus hydroclimate change is of great practical importance to society. People rely on model projects to provide some insights on regional hydroclimate. And I hope my work could contribute to understanding and modeling this better.