One of the Denizens noticed that a plot of the Martin et al. 2002 data I had plotted against the EPICA CO2 data appeared to be different than published in the paper. I have not been been paying much attention to the papers with respect to calculations of sensitivity and accuracy of the temperature calculations for the proxies. Since I am looking for the timing of events and the response times, the margins of error are not a particular concern at this time since I am not worried about magnitude. Still, there are quirks in software packages and operators. So this is a closer look at the Martin et al Mg derived bottom water temperature data.
At times I do attempt to interpolate sections of data that is missing, but as far as I know I have noted any fiddling with the data and even provided warnings if is was a really funky experiment. In is nice to know that others are watching because every one screws up. I this case, I don't see were I may have though.