Cinematic 4K. Aerial shot with drone. Drylands and deserts are defined by their scarcity of water. They are zones where precipitation is counterbalanced by evaporation from surfaces and transpiration by plants. Deserts are complex evolving structures whose characteristics and dynamic properties depend on many interrelated links between climate soil and vegetation. Cool coastal subtropical cold winter desertification land degradation sahara region arabian gobi climate kalahari great victoria patagonian syrian basin chihuahuan sandy zone karakum colorado sonoran kyzylkum taklamakan thar gibson dasht-e margo registan simpson atacama mojave namib dasht-e kavir loot 3840×2160 UHD 4K.