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Roger Randall Dougan Revelle died on July 15th of this year, still active and very much involved in the great global change issues of our day. He will be remembered with fondness and respect by all of us in earth sciences for his deep interest in fundamental science and for his strong desire to apply scientific knowledge toward human good. He was a major figure in fostering international cooperation in ocean science, having founded the Scientific Committee on Oceanic Research (SCOR) and the Intergovernmental Oceanographic Commission (IOC).