风力发电机对荒漠草原地表温度及蒸散发的影响

Effects of Wind Turbines on Land Surface Temperature and Evapotranspiration in a Desert Steppe

以内蒙古朱日和风电场为例,利用Landsat 5及Landsat 8数据对风力发电机建设前后的地表温度(LST)及蒸散发(ET)进行了模拟,并统计了风力发电机所在位置与周围8个相邻像元、以及风力发电机240 m缓冲区范围内的LST、ET均值及显著性差异,以此来判断风力发电机对荒漠草原地表温度及蒸散发的影响程度。本文结论如下:①风力发电机运行使其各方向的LST在冬季出现显著差异(P<0.05),并且在其240 m范围内的LST有显著降温趋势。②风力发电机运行不仅使其各方向的ET产生非常显著差异(P<0.001),风机所在位置ET最小,西北方向ET最大,并且在其90m范围内有显著降低趋势。③风力发电机的运行使其各方向的LST与ET显著不相关。

Taking Zhurihe Wind Farm in Inner Mongolia as an example,the land surface temperature(LST)and evapotranspiration(ET)before and after the construction of the wind turbines were simulated using Landsat 5 and Landsat 8 data,and the LST and ET values and significant differences between the location of the wind turbine and the surrounding 8 adjacent pixels,and within 240 m buffer zone of wind turbine were counted,so as to judge the influence degree of wind turbine on the surface temperature and evapotranspiration of desert grassland.The conclusions of this paper are as follows:(1)The LST of wind turbine in different directions is significantly different in winter(P<0.05),and the LST within 240 m has a significant cooling trend.(2)The ET of wind turbine in different directions is significantly different(P<0.001),including the minimum ET at the location of wind turbine and the maximum ET in northwest direction,and wind turbine has a significant decreasing trend within 90 m.(3)The operation of wind turbine makes LST and ET significantly irrelevant in different directions.