lol, the image is from http://www.noaanews.noaa.gov/stories/images/treeringsections.jpg Stories, indeed. Someone has told a whopper and everyone is blithely ignoring the utter falsehood of the story.
Most readers here check in on WUWT on a fairly regular basis. Once again, we see Mike Mann as a topic of conversation. Mann and his insipidly stupid tree rings. I’ve asked there if anyone can produce the work of science which allows for reading temperatures from tree rings to get an annual temp average. And, I’m making the same appeal here.
As we’ve discussed on this blog a few times….. Dividing By Zero, Brain Surgeon Was His First Choice, and A Test In Determining A Hemispheric Temp Mean/, there isn’t a way to determine what the annual or decadal temp mean is by the rings used in their sampling. Even ignoring all of the factors involved in tree growth, and assuming one can tease a temp signal out of these rings. (I maintain one can not.) We don’t know what the temps were during the rest of the year. The growth season for these particular trees is only 6-8 weeks out of the year.
Someone please show me the work of science that discusses what the temps were outside of the ring growth period and how they believe they can estimate what the temps were without growth from the rings.