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This animation shows the variability of the fourteen general circulation models (GCMs) in simulating surface air circulation over the Arctic. Surface winds blow roughly parallel to the isobars in a direction with low pressure situated on the left. The across-model variability is defined here as the standard deviation (wikipedia link) of simulated sea level pressures across the fourteen GCMs for each calendar month.
Regions of highest variability are indicated in yellows and reds, while blues and greens indicated regions and times when the GCMs agree well on their simulations.