What is dew point?

  • (noun): The temperature at which the water vapor in the air becomes saturated and condensation begins.

Dew Point

The dew point is the temperature below which the water vapor in a volume of humid air at a constant barometric pressure will condense into liquid water. Condensed water is called dew when it forms on a solid surface.

Read more about Dew Point.

Some articles on dew point:

Precipitation (meteorology) - How The Air Becomes Saturated - Cooling Air To Its Dew Point
... The dew point is the temperature to which a parcel must be cooled in order to become saturated, and (unless super-saturation occurs) condenses to water ... There are four main mechanisms for cooling the air to its dew point adiabatic cooling, conductive cooling, radiational cooling, and evaporative cooling ...
Dew Point Depression
... The dew point depression (T-Td) is the difference between the temperature and dew point temperature at a certain height in the atmosphere ... In the lower troposphere, more moisture (small dew point depression) results in lower cloud bases and is also important to severe thunderstorms ... when there is a mid-level dry layer (large dew point depression) known as a "dry punch", which is favorable for convection if the lower layer is buoyant ...
Dew Point - Frost Point
... The frost point is similar to the dew point, in that it is the temperature to which a given parcel of humid air must be cooled, at constant barometric pressure, for water vapor to be deposited on a surface as ... (Compare with sublimation.) The frost point for a given parcel of air is always higher than the dew point, as the stronger bonding between water molecules on the surface of ice requires higher temperature to break ...
Surface Weather Observation - Data Reported
... Dew Point is the temperature to which a given parcel of air must be cooled, at constant barometric pressure, for water vapor to condense into water ... The condensed water is called dew ... The dew point is a saturation point ...
Air Dryer - Desiccant Dryer
... duty of the desiccant is to bring the pressure dew point of the compressed air to a level in which the water will no longer condense, or to remove as much water from the compressed air ... A standard dew point that is expected by a regenerative dryer is −40 °C (−40 °F), this means that when the air leaves the dryer there is as much water in the air as if ... Required dew point is dependant on application and −70 °C is required in some applications ...

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