Kylmäilmaa
Kylmäilmaa refers to cold air masses, typically originating from polar or arctic regions. These air masses are characterized by their low temperatures and often bring about significant weather changes when they move into a region. The formation of kylmäilmaa occurs when a large body of air remains stationary over a cold surface, such as ice sheets or snow-covered land, for an extended period. During this time, the air loses heat to the surface through conduction and radiation, leading to its cooling.
When kylmäilmaa advances, it displaces warmer air, resulting in a drop in temperature, clear skies, and often