Via Leo Hickman's Twitter feed, the World Meterological Organisation has issued its Annual Statement on the Status of the Global Climate, announcing that that global warming is accelerating.(Press release here)
The annual statement for 2011 was released for World Meteorological Day 23 March. In addition, WMO also announced preliminary findings of the soon to be released Decadal Global Climate Summary, showing that climate change accelerated in 2001-2010, which was the warmest decade ever recorded in all continents of the globe.
A few years ago, reader Paul M produced an instructive paper on how this kind of analysis works. Perhaps the IPCC should familiarise themselves with it before their next state of the global climate statement.