Planetary albedo, symbol is Greek alpha character
A ratio of the radiation reflected by a surface to that incident on it.
Clouds are the chief cause of variations in the Earth's albedo since clouds have highly varying albedo, dependent upon thickness and composition. Old snow is about 55% (0.55), new snow around 80% (0.8). water surfaces vary from very low about 5% (0.05) at high sun elevation to at least 70%(0.70) at low sun angles.
GES DISC Datasets
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