His actual statement:

He added: “Some of the models suggest to Dr [Wieslav] Maslowski that there is a 75% chance that the entire north polar ice cap during some of the summer months could be completely ice-free within the next five to seven years.”

Gore cited findings from climatologist Dr Wieslav Maslowski, a research professor at the Naval Postgraduate School (here).

However, it appears he mis-stated the forecast, according to reporting at the time.

In an interview with The Times published on Dec. 15, 2009 (here), Dr Maslowski said: “It’s unclear to me how this figure was arrived at. I would never try to estimate likelihood at anything as exact as this.”

According to the report, Gore’s office acknowledged after his speech that the 75% figure was used by Dr Maslowski as a “ballpark figure” in a conversation with the vice president several years before COP15.