What does "air mass modification" refer to in meteorology?

The term "air mass modification" in meteorology specifically refers to alterations in temperature and moisture content of an air mass. An air mass is a large body of air that tends to have uniform temperature and humidity characteristics. When it moves over different surfaces, such as land or water, or interacts with other air masses, its temperature and moisture can change. For example, when a warm, moist air mass moves over colder land, it can lose heat and condense moisture, leading to changes in its properties. This transformation can significantly impact weather patterns, leading to precipitation or changes in temperature. Understanding air mass modification is crucial for predicting weather changes and the development of storms.