There have been a variety of discussions in the past week about what
ice core data tells us.
There is a misconception that
ice core data tells the local temperature record.
Not exact matches
If we do that, the increase in atmospheric CO2 from 320 to 390 parts per million since 1850 is only about half as much (22 %) as the cherry - picking IPCC has
told us, based solely on
ice -
core data....
WHT, I
told you before and I'll try again: 1) I don't accept the gas
data from
ice core records — it was an excellent example of confirmation bias at work and it's physically implausible.
I have already dealt with the proposition that the warming effect is not significant — both
ice core data and the fossil record
tell us that it is unprecedented in at least the last 55 million years (when the Himalayas began to form) and very significant.