For numerical simulation and character of wind field with high resolution in complex terrain, mesoscale meteorological model WRF with data assimilation technology of nudging was used to realize numerical simulation of wind field with 1 km horizontal resolution in Hami area where terrain is very complex. By comparison with mast observation data, the simulation result after assimilation was close to observation data, the absolute error of wind speed simulation results decrease 0.25 m·s-1. The simulation results corrected the problem that overestimate wind speed in breeze condition and underestimated in high wind condition. And simulation results of wind profile was also more consistent with observations. Through analysis of simulation results of wind field in Hami complex terrain by 1 km horizontal resolution with 10 min interval output, some conclusions were draw as the followings:(1) As terrain is very complex in Hami area, the wind speed distribution is very different. In April, the high wind area is mainly distributed in the north area of mountain and the pass area that is south of mountain in west region. While in July, the high wind area is located in the south area of pass in west region and north region. (2) Wind shear was negative in breeze condition under complex terrain, and the smaller the wind speed, the larger the negative shear value, and negative shear value was higher in more complex terrain. While in high wind condition, the vertical shear was positive even in complex terrain, but the positive value was less than that in flat area. And the positive value was greater with wind speed increasing in flat area. (3) The temporal and spatial distribution of the proportion in full-load wind condition was very different when wind speed is between 12 and 25 m·s-1 as terrain is complex in Hami area. The wind speed was high in April, the proportion of full-load wind speed was more than 20% in most areas, especially in north area and pass area in west region, the proportion was even more than 50%, the average wind speed of full-load at 80 m was higher 0.60~0.80 m·s-1 than that at 60 m, and the difference was larger than that of monthly average wind speed. (4) The variation of wind direction with 10 min interval was not obvious in high wind condition, while in breeze condition, the variation was bigger. The variation value was bigger in flat area than that in complex area. (5) The vertical variation of wind direction was more consistent with wind speed. The smaller the wind speed, the greater the vertical variation of wind direction, and terrain will be more complex, the vertical variation will be greater.
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