Geoffrey K. Vallis is a senior scientist and professor in the Program in Atmospheric and Oceanic Sciences and NOAA's Geophysical Fluid Dynamics Laboratory at Princeton University. He is also an associate faculty member at the Program in Applied and Computational Mathematics, and a former professor at the University of California, Santa Cruz. Until recently he was editor of the Journal of the Atmospheric Sciences. His research interests include the general circulation of the ocean and atmosphere, turbulence theory, and climate dynamics. He has taught a wide range of topics at Princeton and the University of California, and he has published extensively in both the oceanographic and meteorological literature.