西岸 せいがん海洋 かいよう せい気候 きこうであれば
seigankaiyō sei kikōdeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 西岸海洋性気候

1. if it were a West Coast oceanic climate; if it is a West Coast oceanic climate

Ba Conditional