ilmastojen
Ilmastojen is the genitive plural form of ilmasto, the Finnish noun meaning climate. As a grammatical inflection, it denotes possession or relation to multiple climates and is used when talking about the climates of several places or in phrases that describe climate in a broader or comparative sense. It is not a standalone concept but a case form that appears in climate-related discourse.
Common uses include phrases such as maan ilmastojen muutos (changes in the country’s climates), maailman ilmastojen
Relation to related terms: ilmasto is the base noun meaning climate, and ilmastonmuutos is the standard Finnish