Portrait of J. Michael Wallace

Atmospheric Sciences

J. Michael Wallace

Professor Emeritus

As one of the world’s leading experts on climate change, John Wallace has spent his career studying the way the global climate varies on different time scales (e.g., year-to-year, or decade-to-decade). As an atmospheric scientist, he was one of the first to describe the Pacific Decadal Oscillation—periods of alternating cool and warm surface water that can last for decades at a time, and correlate with major changes in marine ecosystems. He has won numerous awards and prizes over the years, from an Alfred P. Sloan Fellowship to the Revelle Medal from the American Geophysical Union. Similarly, he is an elected Fellow of the American Meteorological Society, the American Geophysical Union, and the American Academy of Arts and Sciences, and he is also a Member of the National Academy of Sciences.