Dr. Randerson uses trace gas measurements from ground and space-based instruments and models to study the global carbon cycle. He has conducted field work in Alaska and Siberia to assess fire effects on atmospheric composition and ecosystem processes. He is a member of the science team for NASA's Orbiting Carbon Observatory and co-chair of the biogeochemistry working group of the Community Climate System Model. In 2005 Randerson was awarded the James B. Macelwane Medal by the American Geophysical Union. He received a Ph.D. in biological sciences (1998) and a B.S. in chemistry (1992) from Stanford University. He conducted postdoctoral work at University of California, Berkeley and University of Alaska. He is a Fellow of the American Geophysical Union.