The Roger Revelle Medal is given out annually by the American Geophysical Union to recognize "outstanding accomplishments or contributions toward the understanding of the Earth’s atmospheric processes, including its dynamics, chemistry, and radiation; and toward the role of the atmosphere, atmosphere-ocean coupling, or atmosphere-land coupling in determining the climate, biogeochemical cycles, or other key elements of the climate system". The award was created in 1991 and named after Roger Revelle. Source: Wikipedia (en)