Raymond Thomas Pierrehumbert FRS is the Halley Professor of Physics at the University of Oxford.

He earned a degree in physics (A.B) from Harvard College and a Ph.D. in aeronautics and astronautics from the Massachusetts Institute of Technology.

He is a Fellow of the American Geophysical Union (AGU) and has been named Chevalier de l'Ordre des Palmes Académiques by the Republic of France.

[2] Pierrehumbert's central research interest is how climate works as a system and developing idealized mathematical models to be used to address questions of climate science such as how the earth kept from freezing over: the faint young sun paradox.

[3] Pierrehumbert contributes to RealClimate[4] and is a strong critic of solar geoengineering research.