Accuracy assessment of MODIS daily snow albedo product based on scaling transformation

MOD10A1 product provides daily shortwave albedo in the regions covered by ice and snow, validation work is needed to access the usefulness for the cryospheric science applications. In this study, ground measurements on three typical glaciers in western China are used to calibrate the albedo products derived from TM images, which are then aggregated to MODIS resolution for determining the accuracy of MOD10A1 daily albedo product. The validation results show that: the product on continental type glaciers is reasonably accurate, with the average error of less than 0.026, and the RMSE less than 0.068, so it can be applied to cryospheric science research; the product on maritime type glaciers replies a relative poor accuracy, with the average error of -0.073 and the RMSE 0.112. The difference in accuracy of MOD10A1 daily albedo product over different glaciers may be caused by the diverse surface characters of different type glaciers.