Atmospheric water vapor is the absolute amount of water dissolved in air. When measured in linear units (millimeters, mm), it is the height (or depth) the water would occupy if the vapor were condensed into liquid and spread evenly across the column. read more
There are many words and phrases used to describe the amount of water vapor in the atmosphere. Some are very technical, and others are used in less technical conversation, such as when we talk about humidity. When you start talking about dew point or relative humidity you are getting into the lexicon of meteorologists. read more
Water vapor, water vapour or aqueous vapor is the gaseous phase of water. It is one state of water within the hydrosphere. Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Unlike other forms of water, water vapor is invisible. read more