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Foggy is my youngest son. He is always being teased by his brothers and sisters. Foggy has a habit of getting things mixed up.
You might say he is in a fog!


Foggy may be a little mixed up, but when it comes to fog he right on target. He has listed the different types of fog below. He wants to hear from you about your experiences with fog. So after you read these definitions and play his MIXED UP puzzle game, share your fog experience in his guestbook!

Radiation Fog - Radiation fog will form when the ground cools traditionally so that the air coming in contact with the surface will cool to its dew point temperature. Usually around 100 m thick.
Advection Fog - Formed when warm air is blown over a cold surface so that the is cooled to its dew point. Fog off the coast of California is partially cooled when the air travels across the cool ocean, in addition to picking up more moisture. As the air travels inland it is forced to rise up the mountains and adiabatically cools even more.
Frontal Fog - As a warm front appears, continuous rain over a long period of time may saturate the air thus creating frontal fog.
Upslope Fog - This type of fog will form when the air near the ground is cool enough so that it will not rise and moist enough that when it moves upslope, can cool to its dew point. This can take place over several hundred kilometers. For instance, in Kansas, if an east wind is blowing, air starting out at 300m ASL on the eastern border will rise and cool adiabatically as it reaches the western border of the state which is 1200m ASL.
Steam Fog - (also known as Arctic Sea Smoke) This fog, seen commonly in the winter when a person breathes, is usually only a few meters thick. It forms over water or a wet surface when it is warmer than the surrounding air (for instance, over hot pavement in the summer). As the air is warmed and moistened, it then re-mixes until it reaches saturation above the surface.

Below is a jigsaw puzzle of Foggy. See if you can help him get all straightened out.


All Contents Copyrightę Dr. Julia Spencer, Ph.D.1987-2012
(unless otherwise noted)
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Foggy's all mixed up. He's in a fog. Can you help Foggy straighten things out?

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