The dew point is the temperature at which air becomes saturated with moisture, causing water vapor to condense into liquid water (dew). It is an important indicator of humidity and can help determine how comfortable the air feels. When the air temperature drops to the dew point, the relative humidity reaches 100%, meaning the air can no longer hold all the moisture in vapor form. For example: - A higher dew point indicates more moisture in the air, suggesting a more humid environment.
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The temperature at which an air parcel with a specified water vapor partial pressure first becomes saturated on cooling at fixed pressure. It solves with saturation pressure . A falling dew point during ascent does not by itself imply loss of water vapor.