In the past 50 years, as regional temperatures have warmed, the growth of bristlecone pine trees at high altitudes has been accelerating, whereas that of trees lower down the slopes has not, according to the results of a study published November 16 in the Proceedings of the National Academy of Sciences. (scientificamerican.com)
On the other hand, it is appropriate for any, possibly every, «climate scientist» to object to the pretenses of «their» implicit «claims» of validity of bristlecone pines as temperature proxies. (climateaudit.org)
Furthermore, though there is an ambiguity in the time - dependent strength of the response of Bristlecone Pine trees to temperature variability, there is other evidence that these trees do display a temperature response. (climateaudit.org)