The Impact Of Wind Farm On Local Micro Meteorological Environment In Arid Region

By means of observation method using HOBO automatic meteorological station,this paper researches on the impact of wind farm on wind speed,air temperature and humidity,land surface temperature and evaporation in Sunite Youqi Inner Mongolia Autonomous Region. All the meteorological factors are both within the scope of the near-surface3m.The results showed that:(1) The existence of wind farm makes the wind speed of local area decreased.The relationship of the average wind speed is upwind area>downwind area>inner wind farm. The influence of wind farm on wind speed is decreased with the increase of environmental wind speed. There is no obvious effect on the form of wind velocity profile,but the wind velocity profile slope in the wind farm decreases compared with upwind area. That is to say the change of wind speed in vertical gradient in the internal area of wind farm is not significant.(2) In the daytime,air temperature reduces and relative humidity increases in internal wind farm,that is cooling humidification effect. At night,on the contrary,it shows the warming dehumidifying effect. For24hours a day,inner windfarm area has higher temperature and lower humidity, near-surface air becomes warm and dry.(3) Water surface evaporation of24hours in the wind farm is reduced obviously, the relationshipof each point is upwind area (15.3mm)> downwind area (14.97mm)>inner wind farm (14.59mm). Directly below the independent wind motor has the largest daily evaporation.Parallelly to the axis of the wind direction, the evaporation decreases gradually with the increase of distance from the wind motor, while the independent wind motor has no obvious impacts on evaporation of perpendicular to the wind direction.