One theme of this site over the last month or so has been the misleading use of numbers. This is very much related to the ongoing discussion of whether warming has stopped or not. One side, the Anti-AGW, says it has stopped and therefore global warming is not happening and never will, conveniently forgetting that a lot of it has already occurred. The other side, the Pro-AGW, says warming still happening

There has recently been discussion on the blogosphere as to whether or not global temperatures are continuing to rise, have levelled off, or are falling.  For example the ‘Met Office in the Media’ site had a rebuttal of an article in the (United Kingdom) Daily Mail which, inter alia, claimed there had been no warming for 15 years. ( http://metofficenews.wordpress.com/2012/01/29/met-office-in-the-media-29-january-2012/) 

Recently there has been a thread at Skeptical Science (www.skepticalscience.com) in which they claim that Pat Michaels has distorted the science of climate change by deleting parts of figures. I hold no brief for Michaels and am not intending to comment on the accuracy or otherwise of the claims. However, if the pot is calling the kettle black it had better make sure that it is burnished and spotlessly

In a recent paper Foster and Rahmstorf (F and R, Global temperature evolution 1979–2010) examine the influence of three factors which introduce variability to the temperature record: ElNino/Nina, Volcanoes and Total Solar Irradiance(TSI). They chose to represent the El Nino/Nina effect by the Multivariate El Nino Index (MEI), volcanoes by Aerosol Optical Thickness Data and TSI by sunspot number.

On our web site we have a range of climate reconstructions (http://www.climatedata.info/Temperature/reconstructions.html). One which stands out from the others is the one which was included in the IPCC 1990 Technical Report as Figure 7.1c. This figure is included in Chapter 7.In the report it is clearly stated that the figures are to be taken as representing global temperature variations.  It

A discussion at Watts up with That (WWUT)(http://wattsupwiththat.com/2011/12/29/uhi-in-south-korea-responsible-for-over-half-of-the-warming/#more-53862)... reports on a paper which shows the due to its high energy use the effect of the Urban Heat Island in South Korea accounts for much of its apparent rise in temperatures. (Quantitative estimates of warming by urbanization in South Korea over the past

This is where you can comment on our site. Is there other data you would like to see? Do you have comments on the data we have presented or the way we have described it? Have you found and errors in the data, And, of course, words of thanks or encouragement would also be appreciated. At the RealClimate blog blog there have been comments on this site. Whilst I have addressed many of them as comments

Recently there has been a number of blog postings linking temperature and El Nino. Tamino (http://tamino.wordpress.com/2011/12/06/the-real-global-warming-signal/) based on a paper by Foster and Rahmstorf used the link to show that global warming had not levelled off. Meanwhile Frank Lansner at WUWT did a similar analysis to show that there had been a levelling off.One thing which always surprises me

Thesis: The presentation of sea ice in TAR4 used only a sub-set of the data. It should use a wider range of data with reference both to data which were available at the time of TAR4, and data which have become available since. The technical summary presents the following set of graphs: The way the graphs are presented is reminiscent of graphs of return on investment of rivals presented by some

Thesis: That the discussion of sea level rise in IPCC TAR4 has much to recommend as a model for other topics.Those of you who have already seen our first thesis, on global temperatures, may have got the impression that we were out to ‘get’ the IPCC. This is not the case. We are self-financed and have no agenda. As we say on our Home Page: “We are trying to prove only one thing: rational debate