I have written extensively on this blog about the tweaking, “adjustment” and manipulation of the historic and present temperature “record” which are presented in the official figures.
With the poor placement of stations (91 % of the stations are CRN 3 to 5 = bad to very poor); where they have purposely taken away the urban heat island effect, use huge smoothing radius, the historical “adjustment and tweaking” to cool the past etc.
Not to mention the great slaughter of GHCN stations around 1990 – roughly 63 % of all climate measuring stations were “dropped”. Oddly enough many of them in cold places – Hmmm? Now the number of GHCN stations are back at the same numbers as in 1890.
Just one example of this historical “adjustment and tweaking” they are doing:
On average 20% of the historical record was modified 16 times 2006 to beginning of 2008. The largest single jump was 0.27 C. This occurred between the Oct 13, 2006 and Jan 15, 2007 records when Aug 2006 changed from an anomaly of +0.43C to +0.70C, a change of nearly 68%.
And what a “coincidence” that the data is always “modified” in only on direction – guess which one.
Also remember that the US stations are now nearly a third of the all GHCN world stations.
And as I said in the beginning – always remember that these figures are based on the official data that has been tweaked, “adjusted” and manipulated to fit there agenda (cool the past, ignore UHI and land use change factors, huge smoothing radius – 1200km etc.)..
Just a couple of weeks ago a new report was published by Patrick Frank that shows that there has NEVER been a measurement of Sensor measurement uncertainty in ALL the weather stations used for the “Global” temperature “record”. And that “the systematic error from uncontrolled variables has been invariably neglected”.
Read more:
http://uddebatt.wordpress.com/2011/01/23/how-the-world-temperature-%E2%80%9Crecord%E2%80%9D-was-manipulated-trough-dropping-of-stations/
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