advection vs temperature change

advection and temperature change both are nouns.

Word	Noun	Adjective	Verb	Adverb
advection	Yes	No	No	No
temperature change	Yes	No	No	No

As nouns, temperature change is a hypernym of advection; that is, temperature change is a word with a broader meaning than advection:

advection: (meteorology) the horizontal transfer of heat or other atmospheric properties
temperature change: a process whereby the degree of hotness of a body (or medium) changes

advection (noun)	temperature change (noun)
(meteorology) the horizontal transfer of heat or other atmospheric properties	a process whereby the degree of hotness of a body (or medium) changes