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Pages 154-154

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From page 154...
... Turbulent mixing prevents the buildup of radioactive emanations in shallow layers near the ground except under very stable conditions, disperses aerosols over a greater depth increasing the columnar resistance, and redistributes space charge, producing convection currents. The almost continual state of turbulent motion in the atmosphere is caused by the combined influences of drag, heating, and evaporation from the underlying surface.


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