Further Comment on “What Is the Atmosphere's Effect on Earth's Surface Temperature?”



Xubin Zeng (Eos, 91(15), 134–135, 13 April 2010) has done a valuable service in pointing out that the conventional statement that Earth would be at a temperature of −18°C if its atmosphere were removed cannot be sustained, because the calculation incorporates an albedo that includes clouds. However, his own calculation of −5°C is equally untenable because it uses the current surface albedo.