Details of these calculations differ, but every model must allow the cryosphere to respond to climatic changes because this response plays an important role in determining how much solar radiation is absorbed by the earth. (usask.ca)
(For details of calculations, see original.) (hubpages.com)
I think one has to be cautious in appropriating information imparted in newspaper columns or that does not provide details of calculations. (highinterestsavings.ca)