What is defined as the temperature at which air becomes saturated at constant pressure?

The temperature at which air becomes saturated at constant pressure is known as the dew point temperature. This is the temperature where the air can no longer hold all the moisture in gas form, leading to the condensation of water vapor into liquid water. When the air temperature drops to the dew point temperature, relative humidity reaches 100%, indicating that the air is fully saturated with moisture.

The significance of the dew point temperature lies in its practical applications in weather forecasting, climate studies, and understanding humidity levels. It provides a tangible measure of atmospheric moisture content, which is crucial for predicting various weather phenomena, such as fog, clouds, and precipitation. Unlike the dry-bulb temperature, which measures the actual air temperature, the dew point offers insight into the moisture characteristics of the air.

Understanding dew point temperature is essential for meteorologists and anyone studying atmospheric sciences, as it helps to assess comfort levels for humans, potential for frost formation, and likelihood of cloud formation.