If you are going to analyse temp trends then you also have to include an analysis of the adjustments of the temperature record of course. See
here.
This is a graph from 1976
and here is one from 2006
Or imposed on each other
So has the record changed ?
Well yes. But only with artificial adjustments. Quoting from the link :
Quote:
So approximately 70% of the decline in temperatures after 1935-40 has been removed, it seems.
What is the importance? What is the impact if the original temperature set of 1976 is in fact best estimate?
1) The unique and dramatic temperatures of today, appears to be a mostly empty claim.
2) Effects of CO2 are often evaluated and confirmed by examining the temperatures 1940-2008. So, faulty temperatures necessitate CO2 effect to be reconsidered.
3) Effects on sea level rise predicted for the future are often based on fast rising temperature trends, and thus sea level rise would have to be reconsidered.
4) In short, most predictions of future consequences from climate change are build on the “fact” that temperature where rising strongly 1940-2008, and would need to be reconsidered.
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