Common Remarks

A Polar Low is a meso-scale cyclone which normally occurs during winter time far north from the main polar front. In a northerly flow cold arctic air pours out over relatively warm seawater. Polar Lows start to develop in small baroclinic zones resulting from old Occlusions (see Back-bent Occlusion ), or arctic fronts (see Arctic Front ). Polar Lows are closely related to the Conceptual Model of a Comma. Both are mesoscale systems developing in cold polar or arctic air. Whilst both are induced by upper air disturbances such as PVA and PV, there are some distinct differences.