What do you mean by Cold Deserts?
Cold deserts cover a vast area north of the Himalayan ranges forming an ecosystem with exceptionally low temperatures which may reach - 75°C and a mean annual rainfall of 500-800 mm. They occur in a plateau at 4,500 to 6,000 m and fall within the Trans -Himalayan Biogeographic Zone identified by Rodgers and Panwar (1988) which extends into the Tibetan plateau.