塔克拉玛干沙漠起沙风况

Effective Wind Regime in the Taklimakan Desert

塔克拉玛干沙漠大部分地区以东北风系为主，西南边缘由西北风系控制，西北边缘多以北风为主，南部边缘均有一定数量的偏南风出现。麦盖提、金星和民丰一带为东北风系和西北风系交替控制。有５种风况类型：窄风况型、宽风况型、双风况型、三风况型和多风况型，分别对应复合型横向、斜向、纵向沙垄、星状沙丘和穹状沙丘，起沙风速基本以若羌为高值区向沙漠西部减少。

The characteristics of the effective winds (≥6 m\5s -1 ) are studied through analysis of wind data, grouped in 16 directions, from meteorological stations in the Taklimakan Desert. The desert is dominated by four wind systems. Northeastern wind system predominates in much of the desert; northwestern wind system controlls the southwestern edge of the desert; northern winds blow frequently in the northwestern desert; and some southern winds exist in the southern margin of the desert.These four wind systems result in five types of wind regime: narrow model, wide model, bimodel, trimodel and multimodel, which are respectively responsible for transverse, oblique, longitudinal, star and dome dune. Wind velocity is the highest at Ruo Qiang, the lowest at Yu Tian. It decreases from the east to the west.