Science for the Holidays

 


It is sooo foggy this morning.

Since I'll be off on Monday, I thought we'd touch on some science but mostly leave this for an open thread.

The water vapor in fog comes from nearby sources, such as a large body of water or a moist ground.  Fog forms when water evaporates from a surface and is added to the air.  As the water vapor rises, it bonds with aerosols called condensation nuclei, (such as dust particles), to form water droplets, which then condense.

Fog usually develops when humidity is near 100% and when the air temperature and dew point temperature are less than 4 degrees apart.  At this point, the air is saturated and cannot hold any more water vapor.

From AccuWeather:


In any case, it does make for a white Christmas!

Happy Holidays everyone, enjoy your weekend!!




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