In many of the early posts on this blog, I compared the temperature records of nearby cities, those sited on similar settings less than 25 miles apart. One would think that the temperatures measured at two towns less than 25 miles apart should be quite similar. They weren't.
Today I am looking at the corrections applied to 3 nearby cities. One would think that there would be physical causes for the corrections applied. This doesn't appear to be the case. The three towns in question are York, Geneva, and Fairmont, Nebraska. The three towns are located north south in central Nebraska.
The spacing is something close to how I spaced them above.
One can download the raw monthly means and the final edited monthly means at this site by chosing the towns one wants to examinehere.
By subtracting the raw observations from the final edited data, one can get what the totality of corrections to the raw observation are. For Fairmont, NE, the corrections look like this:
The station moves are the jumps in the level of correction. These plateaus represented by the various station locations shows that there is an inherent 2.5 deg F variation in the average temperature measured due simply to where the thermometer is sited. Yet we are constantly told that we can tease a 1.1 deg F of warming out of this data. The fact that the corrections are 2.2 times that signal says that this data isn't good enough for what they claim they can do with it.
Geneva, NE shows the same kind of phenomonon. Merely subtracting the raw observed data from the corrected data shows a similar pattern.
Again, there is almost 2.5 deg F difference in the bias's simply due to station sitings.
Now let's compare the corrections made for these two towns, only 24 miles apart.
This chart shows some correlation in the step functions in the corrections. But the above chart raises some questions. Did both towns move siting spots at the same time? Why would there be a correlation in the bias if they did that? While one might initially think that the total correction to two nearby towns should be the same, or move similarly, they shouldn't do it in this pattern. It isn't likely that Fairmont and Geneva, NE decided together to move their weather stations at the same time, both to hotter and then both to cooler sites. This makes zero sense for these two towns which are 8 miles apart.
If we subtract the two correction series we find how the corrections alter the relative temperature streams from observed to final editing.
Looking at the above, you can see that from 1953 to the present there have been almost 3 degrees of warming added to Fairmont, NE compared to Geneva's temperature ust 8 miles away. The problem I have with this kind of correction is that it is very difficult to think of a physical cause for such a strange set of corrections.
Let's now throw comparisons of York and Fairmont into the mix. York is 18 miles north of Fairmont. When one subtracts the final edited temperature series from the raw observed temperature series it looks like this:
The red is York and I have compared its correction to Fairmont, 18 miles south. Once again, there is too much similarity in when the step functions occur. The chart below shows all three towns with 5 major bias changes all happening in the 3 towns very closely in time.
There are other funny things about these corrections, that seem to have no physical causation, that would make any sense. The high frequency part of the correction has the two nearest towns out of phase while Geneva and York, on opposite sides of Fairmont, are in phase.
The high frequency corrections are like marking the beak and wing tips of a bird. When both wings are hot, the beak is cold. When the beak is hot, the wings are cold. What physics could possibly cause this to be the case? I can think of none, yet this is what the GISS is doing to the data with their highly mathematical but non physical corrections to the observed temperatures.
To conclude, to believe that these corrections are valid, one must believe that all three towns re-sited their stations at nearly the same times for 100 years, and that when the central town, Fairmont is hot, the other two are cold and vice versa. This strains credibility.