paleoclimatology

/P EY0 L IY0 OW0 K L AY0 M AH0 T AA1 L AH0 JH IY0/
noun
  1. 1

    The scientific study of prehistoric climate of the Earth.

Source: https://en.wiktionary.org/wiki/palaeoclimatology, https://en.wiktionary.org/wiki/paleoclimatology