GIANNETTA WEATHER


Bath, Pa,



"N O T E" All weather articles written by the author, weather records for Bath, Pa. USA, graphs, graphics, pictures, are copyrighted and are owned by the author.

If you make use of data from this site, please make reference to the: Station Licensee: Virginia T. Giannetta. Owner - Author: Charles A. Giannetta. Computer Consultant: Charles E. Giannetta & This Web Site. Thank you.




**Clouds & Weather Part II of II**


Our atmosphere contains substances which attract water vapor by a chemical magnetism. Sea salt, spuming into the air from oceans, is one example. Chemial wastes from industrial processes have an affinity for water. These different microscopic bits lure for water vapor are called:

**Hygroscopic or Condensation Nuclei**


They play a most important behind the scenes role in the process of most forms of condensation.

When watervapor condenses into visible moisture, the droplets are much too small to be seen with the naked eye. They gather around the myriads of tiny condensation nuclei in the air - the salt spray, dust, pollen, and join up in incredible numbers as a group to form a cloud.

**Water droplets are so small, you could put more than 100 million in a teaspoon**


At the center of each droplet of water or ice is even a tiner speck of dust, salt, smoke.

All clouds consist of an assemblage of minute water droplets, ice crystals, or a combination of both. The free floating clouds at very high altitudes (where below freezing temperatures exist) consist of tiny prisms of ice formed by the process of:

Sublimation


In this process water vapor turns directly into ice without going through the liquid stage. Clouds frequently contain water droplets which may exist as water even at levels where temperatures are below freezing. These water droplets are said to be:

Supercooled


Surface tension on the minute droplets keep them in water form. They are unstable and rupture into ice.

© 1998 Charles A. Giannetta

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