climatologist

noun

1. A person who studies, professes or practices climatology.

   “To most people, the huge ice sheets of Antarctica and Greenland are merely water that once was snow. To glaciologists and climatologists, they are storehouses of the Earth's former atmospheres.”

   ““The lack of an agreement to phase out fossil fuels was devastating,” said Prof Michael Mann, a climatologist and geophysicist at the University of Pennsylvania in the US.”