かいりゅう海流kairyuu
1.
A persistent flow of seawater that moves in a consistent direction, influenced by factors such as wind patterns and uneven solar heating, which can vary seasonally, particularly near the equator.
2.
A broad and steady movement of ocean water that plays a significant role in shaping climatic conditions, navigation routes, and fishing grounds.
Example:
海流に変化が起きたのだろうか。