\contentsline {table}{\numberline {1}{\ignorespaces SIAF values (in W m$^{-2}$ K$^{-1}$) for the (top) Arctic and (bottom) Southern Ocean derived from (left) Observations and model simulations of (middle) 4XCO$_{2}$ and (right) historical simulations. Each value shows the central estimate and 2$\sigma $ range across the bootstrapping Monte-Carlo simulations for the observations and inter-model spread for the models. The top row in each hemisphere shows the full calculation using the model specific RS and IS. The second row shows the impact of inter-model differences in IS as calculated using the model specific IS and the observed RS. The third row shows the impact of inter-model differences in RS as calculated using the model specific RS and the observed IS.\relax }}{34} \contentsline {table}{\numberline {2}{\ignorespaces \leavevmode {\color {black}Global albedo feedback (GAF)} in CMIP5 climate models calculated using the methodology of this study -- with a model specific RS from the isotropic model-- compared to that calculated using RS from the GFDL surface albedo kernel for all models. The CMIP5 ensemble mean and 2 $\sigma $ are shown for each hemisphere and divided into ocean and full domains.\relax }}{35}