Abstract
A Turbulent-radiative description of the low-level atmosphere incorporating stratus cloud and fog is developed based on the methodology of second-order closure. Existence criteria for surface layer fog are developed on the basis of the turbulent description. Illustrative application is made to the formation and structure of several fog and cloud episodes including advective-radiative fog, subsidence-capped stratus over the ocean, and surface fog resulting from the nocturnal lowering of stratus.
