Kylmäilmakehän

Kylmäilmakehän is a Finnish term that translates to "cold air mass" in English. It refers to a large body of air that has a uniform temperature and humidity, and is characterized by its low temperature. Cold air masses typically form over high-latitude regions such as polar or continental areas where the ground is cold for extended periods.

The properties of a cold air mass are developed as the air remains stationary over a cold surface, allowing it to acquire the temperature and moisture characteristics of that surface. When a cold air mass moves into a region, it can bring about significant changes in weather. These changes often include a drop in temperature, clear skies, and a decrease in humidity. In winter, the arrival of a cold air mass can lead to frost, snow, and freezing conditions. In summer, it can bring a welcome respite from heat and humidity.

The interaction between different air masses, including cold air masses, is a primary driver of weather patterns. When a cold air mass encounters a warmer air mass, a frontal boundary forms, leading to potential precipitation and shifts in wind direction. The strength and movement of these air masses influence the type and severity of weather experienced. Understanding cold air masses is fundamental to meteorology and weather forecasting.