This is a real eye-opener set of results. The last time the Arctic was significantly warmer than the present day, the Greenland Ice Sheet melted back the equivalent of two to three meters of sea level.
After that we'll be committed to multiple more meters of sea level rise that will occur at rates of up to a meteror three feetper one hundred years.
The results suggest the threshold is close to the end of this century, and it could come sooner. The Arctic is already warming much faster than we thought it would. To think we're not going to get 4 to 5 degrees warmer in another 50 years is wishful thinking.
We're saying that this could come much faster. The ice sheets are more vulnerable to climate warming than we had thought. The only good news I see is that we know about it in advance and can do something about it if we want.
Mother Nature is changing even faster than models suggested it would in the Arctic.
A lot of the stories you read make it sound like there's uncertainty. There's not uncertainty.
As Hurricane Katrina pointed out, we only need a meter about 3.2 feet of sea-level rise to make much of New Orleans unlivable. The same goes for a number of coastal areas.
If we decide to keep on the track we're on now and just keep on warming, because of greenhouse gas pollution, then we could easily cook those ice sheets more rapidly.