1. polar front
Wikipedia definition
2. Polar frontIn meteorology, the polar front is the boundary between the polar cell and the Ferrel cell in each hemisphere. At this boundary a sharp gradient in temperature occurs between these two air masses, each at very different temperatures. The polar front arises as a result of cold polar air meeting warm tropical air. It is a stationary front as the air masses are not moving against each other.
Read “Polar front” on English Wikipedia
Read “寒帯前線” on Japanese Wikipedia
Read “Polar front” on DBpedia


to talk about this word.