Below are the final exchanges from a piece on Thursday’s Today programme. Justin Webb is the Today presenter, Brian Hoskins is a scientist from Imperial College, and Nigel Lawson is the ex-Chancellor. It starts with Hoskins addressing the measurement (note that word, it will come up again) that although over the last 40 or so years we had significant global warming, the temperature rise (at the surface) looks to have slowed a bit over the last 10 to 15 years.
On Tuesday I went to one of the general evening physics run by the local group of the Institute of Physics, mainly Paul Stevenson and others on the committee. Future talks here. It was on climate change and the figure that really stood out for me in the talk is above. It is taken from the newly released physical science bit of the 5th report of the IPCC (Intergovernmental Panel on Climate Change). Basically it shows the temperature averaged over the whole of the Earth and over a decade of time, as a function of time. I.e., the average temperature in the 1980s, in the 1990s, etc. The y-axis is in ºC and is I think the difference in temperature in a decade relative to the average temperature between 1961 and 1990.