Dead flat and basically unchanged from about 1850 to 1980 or so, then a minor up turn at the very end. NO “Global Warming” in this data. Just a small end effect that causes an offset of 130 years of data by 1/2 C, but not with any ‘trend’. For almost the entire graph, the line wanders between -1/2 C and -1 C with sporadic excursions to -1.5 C. Then at about 1987-1990 there’s a 1/2 C “offset” that happens. That’s hardly consistent with CO2 driven gradual global warming theory. (It does match the point in time where the “Modification Flags” change for the data… either a new process or a new type of thermometer was rolled out between about 1987 and 1990, right when we get 1/2 C of offset. IMHO that is the cause of most “global warming” and it is either the use of electronic thermometers and ASOS at airports, or the change of data processing that came with it.)
Not much to say, really. The two series are almost on top of each other the whole time. V3 is a bit more volatile in the past as we’ve seen in other series. Generally we do still have the loss of volatility at the recent end of the graph; but only in the last half dozen years and not out of keeping with prior episodes of other low volatility times.
My biggest “take away” from this graph, though, is just that ‘dead flat for 100 years then a 1/2 C bump in a couple of years” is NOT the signature of CO2. It is the signature of equipment and process changes… There is also an interesting “cold time” between 1870 and 1910, but prior to that is another warm time. Very early the thermometers were either not being closely watched or there was a significant cold spike about 1800 to 1820. “Eighteen Hundred And Froze To Death” was in 1816, so that fits.
In the end, I see nothing that says “CO2 caused global warming” in the Asia data and I see little changed between v1 and v3. That increased slope in the Northern Hemisphere data can now only be carried by either North America or Europe or both. Asia didn’t change.