Lidar observations of wind over Xin Jiang,China: general characteristics and variation

The mobile Rayleigh Doppler lidar based on a Fabry–Perot etalon is developed for wind measurement. The structure and technical parameters of this lidar system are described in brief. The 1740 wind profiles from 8 to 40 km altitudes by the lidar in Xinjiang, China, were obtained in 2010 and 2011, and were used to analyze the characteristics and variations of wind. The results shown that the wind velocity is within a three-layer structure: westerly jet layer (9–14 km), quasi-zero velocity layer (18–22 km) and gale layer (22–40 km). In August and September, the wind direction is within a three-layer structure: zonal westerly wind layer (5–18 km) where wind direction is west, zonal wind reverse layer (18–22 km) where wind direction is unstable and easterly wind layer (22–40 km) where wind direction is east. In October, wind direction is west (8–40 km). Wind observations by lidar are a realistic offset to the rawins.