Swindle Swindle Update

As posted after the documentary "The Great Global Warming Swindle", I noted some serious errors in a particular graph presented by the programme. The Independent in the UK have run an article on it and the author noted:

One of the principal supports for his thesis came in the form of a graph labelled "World Temp - 120 years", which claimed to show rises and falls in average global temperatures between 1880 and 2000.

Mr Durkin's film argued that most global warming over the past century occurred between 1900 and 1940 and that there was a period of cooling between 1940 and 1975 when the post-war economic boom was under way. This showed, he said, that global warming had little to do with industrial emissions of carbon dioxide.

The programme-makers labelled the source of the world temperature data as "Nasa" but when we inquired about where we could find this information, we received an email through Wag TV's PR consultant saying that the graph was drawn from a 1998 diagram published in an obscure journal called Medical Sentinel. The authors of the paper are well-known climate sceptics who were funded by the Oregon Institute of Science and Medicine and the George C Marshall Institute, a right-wing Washington think-tank.

However, there are no diagrams in the paper that accurately compare with the C4 graph. The nearest comparison is a diagram of "terrestrial northern hemisphere" temperatures - which refers only to data gathered by weather stations in the top one third of the globe.

However, further inquiries revealed that the C4 graph was based on a diagram in another paper produced as part of a "petition project" by the same group of climate sceptics. This diagram was itself based on long out-of-date information on terrestrial temperatures compiled by Nasa scientists.

However, crucially, the axis along the bottom of the graph has been distorted in the C4 version of the graph, which made it look like the information was up-to-date when in fact the data ended in the early 1980s.

Mr Durkin admitted that his graphics team had extended the time axis along the bottom of the graph to the year 2000. "There was a fluff there," he said.

If Mr Durkin had gone directly to the Nasa website he could have got the most up-to-date data. This would have demonstrated that the amount of global warming since 1975, as monitored by terrestrial weather stations around the world, has been greater than that between 1900 and 1940 - although that would have undermined his argument.

"The original Nasa data was very wiggly-lined and we wanted the simplest line we could find," Mr Durkin said.

heheh, I love that last line - "the NASA data was very wiggly-lined", therefore to get the simplest line, they completely distort the evidence. Such integrity.

The real global warming swindle

Update: apparently a repeat programme aired on sunday, this time they attempted to correct some of the errors in the outdated data, and also removed the 'NASA' label.

Spot the Difference!