Sunrise or sun up is the instant at which the upper edge of the Sun appears over the horizon in the morning. The term can also refer to the entire process of the Sun crossing the horizon and its accompanying atmospheric effects. Yellow orange tone colors. Cloudy sunrise. Wonderful fantastic excellent amazing beautiful real gorgeous fading clearing beauty sunbeam sunrays line thin layer enigmatic epic spectacular. The temperature profile of the atmosphere is a result of an interaction between radiation and convection. Sunlight in the visible spectrum hits the ground and heats it. The ground then heats the air at the surface. As air rises and cools, it eventually becomes saturated and cannot hold its quantity of water vapor. UHD 4K 3840×2160.