What is the definition of absolute humidity?

Absolute humidity is defined as the actual amount of water vapor present in a mixture of air and water, expressed usually in grams of water vapor per cubic meter of air. This measure indicates how much moisture is contained in the air, regardless of the temperature or pressure conditions.

Understanding this concept underscores the importance of absolute humidity in meteorology and various scientific applications, as it directly influences weather patterns, humidity sensation, and overall atmospheric conditions. When assessing moisture levels, it focuses specifically on the current water vapor concentration without reference to the air's capacity for water vapor, which can shift based on temperature, hence differentiating it from maximum capacity or saturation levels.