Copyright (C) 2003 JVV

Ground Fog

and Temperature Inversion over Coyote Valley

Before moving into a valley to live, see if you can look across it from the mountains. Note that on many mornings, there will be multiple layers of thin clouds or haze across the valley. (You can count five layers in this picture, including the ground fog.) These are temperature inversions which trap auto exhaust, industrial fumes, pesticides, and other toxins in valley air. How prevalent they are will depend upon many factors.

Ground fog is another concern, for if it forms from the moisture of the ground, it will loft small quantities of whatever is on the ground. Although fog is good for agriculture; mold, bacteria, and other decay products that may be lofted by ground fog can be particularly bad for humans on over-grazed and over-"fertilized" ranch lands.

Next Picture -- fog tree

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