David Archer is a Professor in Geophysical Sciences, and a fellow of the American Geophysical Union. His research pertains to the global carbon cycle and its relation to Earth's climate in the past and the future. Archer is the author of The Long Thaw: How humans are changing the next 100,000 years of Earth's climate (Princeton University Press, 2008), an undergraduate text book called Global Warming: Understanding the Forecast (Blackwell, 2006), and a summary guide to the IPCC Fourth Scientific Assessment Report called The Climate Crisis (Cambridge University Press, 2009).

Ray Pierrehumbert is the Louis Block Professor in Geophysical Sciences, a Fellow of the American Geophysical Union, and was named Chevalier de l'Ordre des Palmes Academiques by the Republic of France. Pierrehumbert studies the physics of climate, especially regarding the long-term evolution of the climates of Earth, Mars.Venus, Titan and extrasolar planets. Pierrehumbert was an author of the Intergovernmental Panel on Climate Change's Third Assessment Report (1997-2001), and a member of the National Research Council's Panel on Abrupt Climate Change and its Societal Impacts (2000-2001), and is currently serving on the National Research Council Board on Atmospheric Science and Climate, and the National Research Council Panel on CO₂ Stabilization Targets.