Peter Kalmus, American data scientist at NASA's Jet Propulsion Laboratory and Associate Project Scientist at University of California, Los Angeles’ Joint Institute for Regional Earth System Science & Engineering Daniel Kammen, American professor of Energy at University of California, Berkeley Thomas R. Karl (1951-), American, climate extremes and variability. David Karoly, Australian professor of meteorology at University of Melbourne Charles David Keeling (1928-2005), American, atmospheric carbon dioxide measurements, Keeling Curve Ralph Keeling, American professor of Atmospheric Chemistry at Scripps Institution of Oceanography David W. Keith, Canadian, Geoengineering and CO2 capture and storage research, University Professor at SEAS and Harvard Kennedy School Wilfrid George Kendrew, (1884-1962), Scottish climatologist and meteorologist Gretchen Keppel-Aleks, American climate scientist Joseph B. Klemp, American atmospheric scientist at NCAR Thomas Knutson, American climate modeller, researcher at GFDL Kirill Y. Kondratyev (1920-2006), Russian atmospheric physicist Bronwen Konecky, paleoclimatologist and climatologist Pancheti Koteswaram, Indian meteorologist and former vice-president of the World Meteorological Organization Shen Kuo (1031-1095), Chinese scientist who inferred that climates naturally shifted over an enormous span of time John E. Kutzbach, American climatologist, professor emeritus at University of Wisconsin–Madison