Do you agree, or not, that there are serious concerns about the use of tree ring data as temperature proxies? (climateaudit.org)
To calculate the correlation during the Little Ice Age, researchers compared the core data with proxies for precipitation data, such as data from tree rings, cave formations and other natural records. (sciencedaily.com)
It considered many proxies with an expected or even known relation to summer temperatures, such as tree rings whose growing season is during those months. (climateaudit.org)