Air masses are classified based on their temperature and moisture content. The two temperature classifications for air masses are:
1. Warm air masses: These air masses originate in low-latitude regions near the equator where temperatures are higher. They bring warm and moist conditions. When a warm air mass moves into an area, it can lead to rising air, causing clouds and possibly precipitation. An example of a warm air mass is the maritime tropical air mass, which is warm and humid, originating over tropical waters.
2. Cold air masses: Cold air masses come from high-latitude regions near the poles where temperatures are lower. They bring cold and dry conditions. When a cold air mass moves into an area, it can lead to sinking air, resulting in clear skies and cooler temperatures. An example of a cold air mass is the continental polar air mass, which is cold and dry, originating over polar regions.
Understanding these classifications helps meteorologists predict weather patterns and explain the changes in temperature and precipitation that occur as different air masses interact.