The results show that, under the sub-grid heterogeneous distribution of soil moisture, the surface latent heat flux calculated by Mosaic method is smaller than their true values. Moreover, with the background wind increasing, the deviation decreases. 结果表明,在土壤湿度空间分布不均匀的情况下,运用Mosaic方法计算得到的地表潜热通量偏小,背景风较小的时候偏差较大,背景风增强时偏差减小。