Here's what I find incredible (and telling) about that link.
It makes no effort, whatsoever,to account for the differences in scaling between the data sets.
I've done some preliminary work with the original data sets, and here's what I've found, once you plot them all on the same scale.
Hansen 1981 and Hansen 1987 are virtually identical - any discrepancies (assuming they are genuine discrepancies) are all before 1920.
Hansen 2007 does differ from these two, however,for the part, and to the best of my ability to tell, this
appears to be largely due to a greater number of data points, and is also suggestiveof improved data accuracy. I say this because where 2007 disagrees from 1987 and 1981 (and it's not everywhere), the data generally seems to lie within each others 95% confidence interval.
The thing that I find the most amazing, given what the linked to article is trying to suggest is that Hansen 2007 actually appears to have a lower temperature in 1970 than either Hansen 1981 or Hansen 1987.
The other thing I find highly amusing is that Hansen 2007 has 1900-1880 being warmer than either Hansen 1981 or Hansen 1987. Gee, I wonder why nobody stops to point that out.
On second thoughts, no I don't.
Unlike the author of the link,I have nothing to hide.
Hansen et al 1981
Hansen et al 1987
Addendum:
As near as I can tell, looking at the appropriate papers, Hansen etal 1981 and 1987 were done with approximately 500 stations, I believe the 2007 data set includes something like 1200 stations so...
Addendum:
Something else that I think falls into the 'Funny as fuck' category.
Consider Hansen et al 1987 (specifically figure 6).
What I think is funny as fuck about this in relation to the current 'discussion' is that the warming in the 1940's is not as pronounced in the southern hemisphere as it is in the Northern Hemisphere, and is most pronounced between 64°N and 90°N suggesting that it's probably regional, and probably related to the variations in the arctic highpressure system.
The corrollary of this is that of Hansen et al contains better representation in the southern hemisphere, and the mid northern latitudes then of course it's going to be less pronounced (if it was a regional warming to begin with - incidentaly, the 1965 minima is no lower in the 2007 data set than it is in the 1981 data set for the southern hemisphere) so the article linked to by Photizo is based almost entirely on false premises, apparently wrong assumptions, and either deliberate or accidental misrepresentation.