"Deserts are a main and very divers formation of the global biosphere. Most of them are distributed in tropical-subtropical zones with arid climate. But deserts also occur in temperate zones with arid, cold winter climate. There are three regions under quite different biogeographical conditions: Western North America (Great Basin, Sonora), Patagonia in South America, and Central Asia (in wider sense).
The cold winter deserts of Central Asia can be subdivided according to one of the most accepted concepts by Petrov (1965) as in Walter (1968) and Schroeder (1998), namely into four subregions: Irano-Turanian deserts (I), Kazakh-Dzungarian semi-deserts and deserts (II), Central Asian deserts of Mongolia and North-China (III) as well as the high-altitude deserts in Tibet (IV).
Source: UNESCO WHS Tentative List
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