The Taklamakan Desert, one of the major sources of background Asian dust, is situated in the Tarim Basin, with the Tianshan Mountains in the north, Pamir Plateau in the west, and Kunlun Mountains in the south. Dunhuang (40°00?N, 94°30?E; 1146 m above sea level) is located in the east of the Taklamakan Desert, China. The area is significant for studying the initial state of Asian dust particle transportation, which is mainly influenced by westerly winds.