Dr. Norman G. Loeb works at NASA's Langley Research Center investigating the effects of phenomena such as clouds and aerosols on Earth's radiation budget (amount coming in and going out). He a principal investigator for the Clouds and the Earth's Radiant Energy System (CERES) mission, specializing in the use of satellite measurements to study how much heat and light reach the Earth from the sun and how much is re-radiated into space. He is also Co-Investigator for the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) project. Dr. Loeb holds B.Sc. and Ph.D. degrees in atmospheric sciences from McGill University, and an M.Sc. degree in atmospheric sciences from York University.