"polar front." YourDictionary, n.d. Web. 10 December 2018. <https://www.yourdictionary.com/polar-front>.
polar front. (n.d.). Retrieved December 10th, 2018, from https://www.yourdictionary.com/polar-front
The region or boundary separating air masses of polar origin from those of tropical or subtropical origin. The position of the polar front during winter in a particular hemisphere is at approximately 30° latitude, while in the summer it is at approximately 60° latitude. The convergence of warm and cool air masses along the polar front often produces cyclonic wind systems.