“Turbulence” is a new feature in the Environment tab of the View Options window in Shaded View. “Turbulence” enables the option to display atmospheric smoke effects and low-lying ground smoke or fog effects with irregular and turbulent flow.
“Enable Ground Smoke” is a new feature that is enabled when “Turbulence” is selected. You can display low-lying ground smoke or fog (i.e. dry ice) effect if “Enable Ground Smoke” is selected, and you can further change its properties that become available (i.e. Base Height, Height, Variance and Intensity).