Relative humidity is a measure of the amount of water vapor present in the air relative to the maximum amount of water vapor the air can hold at a specific temperature. It is an important measurement in meteorology and climatology, as it can impact weather patterns, air quality, and human health. Researchers in this area study the factors that influence relative humidity, such as temperature, pressure, and wind patterns, as well as the effects of changes in relative humidity on various systems and environments. They may also investigate methods for accurately measuring and monitoring relative humidity in different settings.