I would expect that the data is averaged from as many diverse sources as possible. Whenever you take an average there will be individual results that buck the trend and Darwin may well fit into this category but there will also be places that exceed the trend. The average will even these anomolies out.
There was a sharp increase in the 3 decades following 1910 but those increases have continued in every decade since with the exception of the 1950s. Indeed the upward trend throughout the whole of last century is clearly visible as is the fact that it is accelerating. Would be interesting to see a graph of CO2 concentrations for the same period.
Anyways the assertion made on these pages that the earth is cooling is clearly false
