Plume Behavior in Stable Air

Because stable plumes tend to have less impact at ground level, the behavior of plumes from elevated sources in stable air has not attracted the same interest that plume behavior in unstable air has. However, some aspects of stable-plume behavior hold great interest. For example, concentrations in the plume remain high for long periods of time, which increases the importance of chemical reactions taking place among plume constituents or between constituents and the ambient air. The nature of the stable plume also has its effect during periods of fumigation, when the high concentrations within the plume are mixed to ground level by the onset of unstable conditions.