Ключевые слова: air, arc, backdrop, background, beautiful, blue, bright, circumhorizontal, cirrus, climate, cloud, clouds, cloudscape, color, cumulus, day, environment, fire, halo, heaven, horizon, icehalo, light, meteorology, nature, open, optical, outdoor, ozone, pattern, phenomenon, physics, rainbow, scene, season, sky, space, summer, sunlight, view, wallpaper, weather, white,