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- Syukuro Manabe (1931- ), Japanese, pioneered the use of computers to simulate global climate change and natural climate variations.
- Gordon Manley (1902–1980), English, Central England temperature (CET) series.
- Michael E. Mann (1965- ), American, paleoclimate reconstructions.
- Patrick Michaels (1950- ), American climatologist.
- Gordon McBean, Canadian, boundary layer research, hydrometeorology and environmental impact research, and weather forecasting.
- Milutin Milanković (1879–1958), Serbian, Milankovitch cycles.
- John F. B. Mitchell, British, climate modelling and detection and attribution of climate change
- Mario J. Molina (1943- ), Mexican, atmospheric chemistry and ozone depletion.
- Richard A. Muller (1944- ), American physicist, head of the Berkeley Earth Surface Temperature project, formerly an outspoken critic of current climate change science.
Read more about this topic: List Of Climate Scientists