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Abstract
Changes in global albedo of the Earth can depend on regional variations in reflectivity. We compare here three regional factors that have been considered capable of causing significant changes in global albedo, representing them approximately by zonal averages. Our calculations suggest that
(1) large latitudinal changes in ice cover will have only a slight effect on the planetary albedo, and
(2) latitudinal shifts in the cloud belts can produce significant changes in the planetary albedo.