Based on a large number of model runs, the IPCC also provides an assessment of the spatial variability in future LSL changes due to thermal expansion and ocean circulation changes. Although rather uncertain in the details, it appears that spatial variations are on a range of +/- 0.3 m. The figure shows LSL changes during the 21st century due to ocean density and circulation change relative to the global average. Positive values indicate greater local sea level change than the global average. The LSL changes are calculated as the difference between averages for 2080 to 2099 and 1980 to 1999, as an ensemble mean over 16 AOGCMs forced with the SRES A1B scenario. Stippling denotes regions where the magnitude of the multi-model ensemble mean divided by the multi-model standard deviation exceeds 1.0. From Meehl et al. (2007).