is a Research Associate Professor with the University of North Carolina at Chapel Hill’s Institute for the Environment and Adjunct Associate Professor at the UNC Department of Environmental Sciences and Engineering (B.Tech in Chemical Engineering, Anna University, India: M.S. and Ph.D. in Chemical Engineering, Rutgers University, NJ, USA). Dr. Arunachalam has performed interdisciplinary research collaborating with experts from atmospheric science, environmental engineering, transportation and land use planning, risk analyses and environmental economists and public policy. Dr. Arunachalam is an international expert air quality modeler with extensive experience in developing modeling applications using local-to-regional-to-global scale models, and more recently leads the development of web-based reduced-form models to study near-source air pollution and exposures, due to traffic-related, airport- and seaport-related emissions. Dr. Arunachalam has served as the Software Development Coordinator for UNC’s Community Modeling and Analysis System (CMAS) Center since 2003, and develops and offers CMAQ and BenMAP training to an U.S. as well as worldwide audience. He currently directs a U.S. DOT funded Aviation Sustainability Center of Excellence (ASCENT) at UNC to study aviation impacts on air quality at local to global scales, and the environmental benefits of using alternate jet fuels. Dr. Arunachalam has published extensively, and given nearly 200 presentations. His research has been recognized by the FAA and the U.S. EPA with multiple awards.