寒帯 かんたい前線 ぜんせんジェット気流 きりゅうであれば
kantaizensenjettokiryūdeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 寒帯前線ジェット気流

1. If it were a polar front jet stream.; If the polar front jet stream existed.

Ba Conditional