Definitions for "Atmospheric perspective"
In painting, creating the illusion of great distance by representing distant objects as indistinct and shifting their hues toward blue to simulate the effect of intervening atmospheric haze.
the illusion that areas closer to the viewer have more detail and more contrast in value than areas farther away. (Drawing Lesson 19)
(Also aerial perspective) The illusion of depth on a painted surface created by gradually decreasing the intensity of color and contrast until everything in the perceived distance tends toward a bluish-gray.