Ken is a climate scientist at the Carnegie Institution for Science’s Department of Global Ecology and a Professor (by courtesy) in the Stanford University Department of Earth System Science. He also serves as a Senior Scientist at Breakthrough Energy. Ken has a wide-spectrum approach to analyzing the world’s climate systems. He studies the global carbon cycle; marine biogeochemistry, and chemical oceanography, including ocean acidification and the atmosphere/ocean carbon cycle; land-cover and climate change; the long-term evolution of climate and geochemical cycles; and most recently he has been engaging in analyses at the intersection of economics, energy system engineering, and climate. Caldeira received his B.A. from Rutgers College and both his M.S. (1988) and Ph.D. (1991) in atmospheric sciences from New York University.