ARCTIC SEA-ICE VARIABILITY - MODEL SENSITIVITIES AND A MULTIDECADAL SIMULATION
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The statistical model response, evaluated in terms of certain metrics or integrated features of the ice model output, is a function of a selected set of d (= 13) prescribed parameters of the ice model and is therefore equivalent to a d-dimensional surface. The d parameters of the ice model are varied simultaneously in the sensitivity tests. The ice model results indicate that 1) interannual variability is a major contributor to the differences of ice thickness and extent over timescales of a decade or less, and 2) the timescales of ice thickness anomalies are much longer than those of ice-covered areas. However, the simulated variations of ice coverage have less than 50% of their variance in common with observational data, and the temporal correlations between simulated and observed anomalies of ice coverage vary strongly with longitude. -from Authors