The issue peaked just before the 2009 UNclimatesummit in Copenhagen, when a batch of e-mails and other documents was stolen from a CRU server and made public - the affair dubbed "ClimateGate".
They'll be talking about what needs to be done to ensure that an adequate proposal goes on the table at the next UNclimatesummit, in Qatar in December, for putting EU emission cuts (and possibly others too) under the Kyoto Protocol.