Roger Revelle (1909-1991), American, global warming and chemical oceanography. Lewis Fry Richardson (1881-1953) English mathematician and meteorologist Eric Rignot, American professor of Earth System Science at University of California, Irvine Alan Robock (1941-), American climatologist, professor at Rutgers University Joseph J. Romm (1960-), American author, blogger, physicist Carl-Gustaf Rossby (1898-1957), Swedish-American climatologist Frank Sherwood Rowland (1927-2012), American atmospheric chemist at University of California, Irvine Cynthia E. Rosenzweig (c. 1958-), American climatologist, pioneered the study of climate change and agriculture William Ruddiman, American, palaeoclimatologist, Early Anthropogenic Hypothesis Steve Running, American global ecologist at University of Montana