Figure 9.9: Change in annual
mean sea-ice thickness between the periods 1971 to 1990 and 2041 to 2060 as simulated
by four of the most recent coupled models. The upper panels show thickness changes
in the Northern Hemisphere, the lower panels show changes in the Southern Hemisphere.
All models were run with similar forcing scenarios: historical greenhouse gas
and aerosol loading, then future forcing as per the IS92a scenario. The colour
bar indicates thickness change in metres - negative values indicate a decrease
in future ice thickness.