1) Glaciologist 
• (n.) One who attributes the phenomena of the drift, in geology, to glaciers.
Gla'cial·ist noun One who attributes the phenomena of the drift, in geology, to glaciers. 
A glacialist is a person who studies ice and its effects on the earth's surface.
glacialist, glacial geologist 1. Someone who studies geological phenomena involving the action of ice; especially, of glaciers. 2. Anyone who attributes the phenomena of the drift, in geology, to glaciers.
a person who studies geological phenomena involving the action of ice, esp. of glaciers.