1 reply to this topic

[virat_chem05]

i have heard somewhat about frostpoint but i m not actually get it . i want basic explaination and also want to know the diff. betwen frost point and dew point.....

[Art Montemayor]

virat:

You can easily obtain numerous explanations on the subject(s) if you use the Google Search Machine on the Web. I used it and immediately found:

http://www.theweathe.../habyhints/347/

and

http://www.shorstmey...rost/frost.html

Basically, Meteorologists use the Frost Point which "is the temperature at which the air is saturated with respect to water vapor over an ice surface. It is more difficult for water molecules to escape a frozen surface as compared to a liquid surface since an ice has a stronger bonding between neighboring water molecules.

Because of this, the frost point is greater in temperature than the dew point. This fact is important to precipitation growth in clouds. Since the vapor pressure is less over an ice surface as compared to a supercooled liquid surface at the same temperature, when the relative humidity is 100% with respect to water vapor the relative humidity over the ice surface will be greater than 100%. Thus, precipitation growth is favored on the ice particles."