Pine island glacier is past tipping point. what other ice sheets can we expect to lose with no more warming?

Your suggestion that it is past the tipping point is misguided. We don't' know that, Katz doesn't know it and it is hard to become too alarmed by what if scenarios that alarmists throw up every day that never seem to come to fruition. Based on his admittedly simple models it may be past a tipping point with potential consequences if all the ice melted...... There are a whole lot of ifs there.