A person who studies, professes or practices climatology.(noun)
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Use "climatologist" in a sentence
"You know the lunatics have taken over the asylum when a climatologist is the action hero of a movie."
"The fact that there is almost zero debate in climatologist circles should be an indicator to people that it probably is real and caused greatly by human interference on Earth."
"OK, so you had me up until this line, “Reporters will seldom acknowledge that the climatologist is speaking for science, who is unified in their understanding of climate trends, and that the spokesman is saying what the energy industry pays him to say.”"