Abstract: The coexistence of barchan and linear dunes in the Qaidam Basin, similar to Mars, has attracted the attention of many scholars. In order to explore the development and formation environment of the co-existing barchan and linear dunes, this paper takes the typical coexisting barchan and linear dunes as the research object, and selects three years of wind data from the meteorological stations near the study area, analysis the wind regime in the coexisting dune regions. The results indicate that there are significant differences in wind speed between different coexisting dunes, the average annual and maximum wind speed in the Qaidam Basin and the Taklimakan Desert are smaller than those in the Saudi Arabia and the Sahara Desert. The threshold wind direction control the orientation of sand dunes, most rangesare uniform throughout the year, and there are obvious primary and secondary winds, which angle between them is acute.In all energy environments and intermediate or low ratio acute bimodal or broad unimodal wind regime, the coexistence of barchan and linear dunes can form, whose development is less affected by the wind energy environment, maybe affected by the wind direction variability, underlying surface, and the sand supply. Seasonal variations of the direction of resultant drift potential is small,and the direction is consistent with the sand dunes, the sand transport directions is stable. In addition, due to the fact that some meteorological stations are far away from typical research areas, the significance of the indication for wind is restricted.

Key words: dune, coexistence, wind regime, sand dirft potential, Qaidam Basin