climatologistnoun [ C ]
uk/ˌklaɪ.məˈtɒl.ə.dʒɪst//ˌklaɪ.məˈtɑː.lə.dʒɪst/a scientist who studies climate (= general or long-term weather conditions):
Climatologists work with computer models, constantly adding new information to study the long-term changes in the atmosphere.