Regional climate models are very important climate research tools available to scientists from developing countries. The ICTP Earth System Physics section maintains and distributes a state-of-the-art regional climate model (RegCM3), which is currently used by a wide research community for a range of studies. The community forms the basis of a regional climate research network (RegCNET) aimed at developing research projects related to climate change issues over different regions of the world. This workshop is intended to provide lectures and hands-on sessions on the theory of regional climate change and regional climate modeling as well as the use of the RegCM3 modeling system. This year's workshop will also cover aspects of climate impacts on agriculture, hydrology, and air quality. The workshop will cover the following topics: - The physical processes that regulate regional climates; - Climate change and seasonal prediction at the regional scale; - Regional climate information from global climate models; - Regional climate modeling and the ICTP RegCM3; - Biosphere-atmosphere interactions; - Climate impacts on agriculture, hydrology and air quality; - Extreme events, floods and drought. The workshop will also provide a forum for current and future participants to the RegCNET to review past projects and plan for future projects. A limited number of students are envisioned, with proven experience in atmospheric modeling and strong interest in regional climate studies