Dew
point
The
Dew point of a given parcel of air is the
temperature
to which the parcel must be cooled, keeping pressure constant, for it to become
saturated. At this temperature
condensation
will begin, if conditions are suitable (presence of a solid surface or other condensation
nuclei; otherwise see
supersaturation),
and
water vapor condenses into
liquid. When the dew point falls below freezing it is called the
frost
point.
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