Land surface albedo, defined as the ratio between the reflected and incident shortwave solar radiation at the surface, is considered one of the critical parameters of the Earth's energy budget (Liang et al., 2010; Trenberth et al., 2009) . As an indicator for denoting the reflectance properties of land surfaces, albedo varies with land cover and geophysical properties (e.g., fraction of snow cover, greenness of vegetation, vegetation structure, surface roughness, and soil moisture). In recent

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... cades, land surface albedo on global and regional scales has been greatly altered by global climate change and human activities (He et al., 2014; Li, Ma et al., 2018) . The land surface albedo changes caused by anthropogenic land cover transformations are acknowledged as one of the leading factors contributing to global climate change (Hansen et al., 1997; Lejeune et al., 2017) . It is therefore important to evaluate long-term land surface albedo changes and their climatic effects using measurements and models (Bright et al., 2015; Schwaiger & Bird, 2010) .