On 14 December 2009, during a speech at the Copenhagen Climate Conference, Gore cited newer research from the same group, saying: "These figures are fresh. Some of the models suggest to Dr [Wieslav] Maslowski that there is a 75 per cent chance that the entire north polar ice cap, during the summer months, could be completely ice-free within five to seven years."

Bob uses the figure of 2030.

Looks like Bob is going to be correct.