More data selectivity from NASA -- Britain's CRU is not alone

Comment from Tasmania:

On the subject of surface stations, one can click here to go anywhere on a world map and bring up temperature graphs of the surface stations in that area. The stations are the ones used by NASA’s GISS to help calculate global mean temperature.

For Tasmania it appears that up until 1993 there were 25 stations being used. At the end of 1992 most of those stations were dropped for data gathering purposes, leaving only the ones at Launceston and Hobart Airports for the next six years. This wiped out many rural areas, all our high stations and also those on the colder, more exposed West Coast.

Two coastal stations appear to have been resurrected around 2008 - Eddystone Point on the warmer north-east tip of Tasmania and Cape Bruny on Bruny Island south of Hobart in the D’entrecasteaux Channel. They are probably now automated.

I have no idea why so many stations were dropped all at once, but interestingly, in examining the charts I found that almost all had recorded a sharp drop of between 1.2 to 1.4 degrees Celsius in the four years from 1988 to 1992, which of course would have been a rather uncomfortable fact for those pushing the AGW theory. Without the colder areas and combined with the known UHI effect at airports, Tasmania would presumably have been contributing warmer mean temperatures to the global calculations after 1992.

However, at the risk of being accused of “cherry-picking”, Launceston Airport may still be an inconvenient truth for the AGW lobby, particularly Tasmania’s “catastrophic man-made global warming” alarmists, Christine Milne, Bob Brown and the Greens.

The trend line has been remarkably stable and refusing to record any local or global warming in that area. The first recorded annual mean temperature was 12.1 degrees in 1939 and 70 years later in 2009, 11.8 degrees. The 1939 mean temperature has only been exceeded five times in that 70 years and only twice with any significance - by 0.4 of a degree in 1962 and 0.6 in 1988.

A brief look at other parts of Australia show that many stations were dropped after 1992. It would be interesting to see the results if other posters here checked the stations in their own areas. Any takers?


Posted by John Ray (M.A.; Ph.D.). For a daily critique of Leftist activities, see DISSECTING LEFTISM. To keep up with attacks on free speech see TONGUE-TIED. Also, don't forget your daily roundup of pro-environment but anti-Greenie news and commentary at GREENIE WATCH . Email me here

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