I'll comment on that again. Subsequent to the information that was reported in the AR4, we began to receive data from the GRACE satellite system, which is now in space and which is focused on both Antarctica and Greenland.
What we're seeing in Antarctica is basically what we would anticipate, based on the global warming projections; i.e., that the Antarctic is more or less stable. When global warming occurs, according to observations and the models, we see high northern latitude amplification. The action is in the northern hemisphere at high northern latitudes.
When GRACE looks at Greenland, it sees a rapidly accelerating rate of mass loss. That's one of the main new things that have appeared since the AR4 was put to bed.