Multiple reflections across a linear discontinuity in surface albedo

Abstract Solar radiation received and absorbed at the surface beneath an overcast sky is calculated as a function of distance d from a linear discontinuity in surface albedo, cloud base altitude h , cloud optical thickness τ, surface albedo α, and precipitable water. Horizontal variation of multiple reflections between surface and cloud is accounted for. Cases of snow or ice surfaces adjacent to open water or snow‐free land surfaces are …