Below are the revised histograms and the map. PaulM noted that some of the larger adjustments were moderated - however, the mean adjustment to the trend increased significantly.
Update: The R code to download and generate a CSV file of trend diffs is here
Distribution of trend changesAgain there are three subgroups - stations that have histories with actual reports for at least
- 360 months (30 years)
- 540 months
- 720 months
Mean 0.031 °C/Decade
Mean 0.0302 °C/Decade
Mean 0.0283 °C/Decade
The histograms seem similar, but the means are about 50% higher.