noun
Meteorological term for the boundary between polar and warmer air masses.
寒帯前線は、北極の冷たい空気と中緯度の暖かい空気の境界です。
The polar front is the boundary between cold Arctic air and warm mid-latitude air.
Compound of 寒帯 (cold zone) and 前線 (front), a calque of the English meteorological term 'polar front'.