noun
paleoclimatology
Scientific field studying past climates using geological and biological evidence.
古気候学は、過去の気候変動を解明する学問です。
Paleoclimatology is the study that elucidates past climate changes.
Climatology studies present-day climate, while 古気候学 focuses on past climates.
Compound of 古 (こ, 'old, ancient'), 気候 (きこう, 'climate'), and 学 (がく, 'study, -ology').