Odds are it is only a rebuild of a few inches(if not less) that will melt off completely this summer when they hit some record highs again...The heat has been offsetting any gains now for decades.
I assume the only thing that would produce a net gain besides few decades of this type of +AO regime would be some sort of super volcanic eruption. Otherwise it is going to take decades of gradual cooling to refreeze what we have lost. I do like seeing cooling in areas that need it, the wildlife definitely needs it, but we are sacrificing our winters int the mean time ugghh...
Not to continue derailing the thread, but the real issue with CC is how we are getting there and what we are doing to our planet during the process. Polluting our water sources and the air we breathe by burning fossil fuels that were stored perfectly over millions of years by the planet (clearly the planet's way of reaching equilibrium was to store all of it away, deep inside the earth). But we chose to yank it all out and throw it back into the atmosphere in what less than 200 years? Our intelligence has given us ways to harness energy from the sun/wind/water, which could have helped us reverse some things, yet greed has kept us from that at this point.
The melting ice sheets/glaciers has happened before and will happen again as will the rebuilding process. Flooding coastlines is not a real issue unless you live there and we are able to move away and/or build walls. As humans we can adapt(fairly quickly) to most of what climate change will throw at us. The real issues here are things such as the acidification of the oceans. Not many care about that or even have a clue as to what that will do so everyone uses the fear of flooding coastlines and sea level rises to help lead a change. Change the chemistry of the oceans too much and we are most likely not going to survive. But I will stop the "left" doomsday stuff, since science has taken a back seat recently. As a scientist with a degree in Marine Biology/Marine Science/Oceanography, the threat is real. It is very disheartening the way I have seen real science being derailed by politcal/corporate greed. I feel scientists need someone to stand up for them, they are going to be the ones that will hopefully find away to "save" us before it is too late (last one I promise)...