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Re: Frost?/Dewpoint?

Square Foot Gardening List - http://www.flinet.com/~gallus/sqft.html

----- Original Message -----
From: Sammy's huwummun <jcosler@mindspring.com>
Sent: Tuesday, September 21, 1999 4:01 AM
Subject: Re: Frost?/Dewpoint?


Square Foot Gardening List - http://www.flinet.com/~gallus/sqft.html

>Is "dewpoint" related to frost at certain temps??

I would say yes if you define "frost" as the presence of ice crystals
(frozen condensation) on a surface.

>What is "dewpoint"???

Dew Point Temperature is the temperature to which the air would have to cool
(at constant pressure and constant water vapor content) to reach saturation
and form condensation. The higher the dew point temperature, the higher the
moisture content for air at a given temperature.   When the dew point
temperature and air temperature are equal, the air is said to be saturated.
Dew point temperature is never higher than the air temperature.  If the air
cools, moisture must be removed from the air and this is accomplished
through condensation. This process results in the formation of tiny water
droplets that can lead to the development of fog, frost, clouds, or
precipitation.

Olin


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