Summary of the article:

## Ground Albedos

The article discusses the calculation of ground albedos in the Community Land Model (CLM). The overall direct beam and diffuse ground albedos are calculated as weighted combinations of "soil" and snow albedos, based on the snow cover fraction.

The soil albedos vary depending on the surface type (glacier, lake, or soil) and the soil moisture content. Glacier albedos are set to constant values, while unfrozen lake albedos depend on the solar zenith angle. Frozen lake albedos are also set to constant values.

Soil albedos are determined based on the soil color class, which is prescribed in CLM to best match observed MODIS surface albedo values. The soil color classes are fitted over a range of 20 classes, and the soil color that produces the closest all-sky albedo in the two-stream radiation model is selected as the representative soil color for the grid cell.

The article includes a table that provides the dry and saturated soil albedos for the 20 soil color classes, in both the visible and near-infrared wavelength ranges.