CP-2156 Life In The Universe

Figure 2. Annual variation of Earth's zonally average planetary albedo as observed by satellites (Ellis and Vonder Haar, 1976) and as computed by a model accounting for variations in surface albedo, cloudiness, and solar zenith angle. Cloud albedo is assumed to obey the albedo/zenith- angle relationship suggested by Cess (1976). More than half the annual variation of the computed albedos is due to solar zenith angle changes. Most of the remaining computed variation is a result of surface albedo changes.(Source Thompson, 1979).

Figure 2. Annual variation of Earth's zonally average planetary albedo as observed by satellites (Ellis and Vonder Haar, 1976) and as computed by a model accounting for variations in surface albedo, cloudiness, and solar zenith angle. Cloud albedo is assumed to obey the albedo/zenith- angle relationship suggested by Cess (1976). More than half the annual variation of the computed albedos is due to solar zenith angle changes. Most of the remaining computed variation is a result of surface albedo changes.(Source Thompson, 1979).

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