Ljungqvist 2010's "Hockey Stick" Paper
About 15 years ago a paper was published[1] that included a proxy reconstruction of extratropical Northern Hemisphere temperatures for the last 2000 years. The graph included in the paper sometimes gets adapted by contrarians to give the impression that the Medieval Warm Period was warmer than today. Here's one example: The claim is then made that this is evidence or proof that Mann's hockey stick was a fraud, and scientists like Mann were actively trying to erase the Medieval Warm Period. Of course there are a few problems with this. The first would be evident if these people just read the abstract of Ljungqvist's paper: Our temperature reconstruction agrees well with the reconstructions by Moberg et al. (2005) and Mann et al. (2008) with regard to the amplitude of the variability as well as the timing of warm and cold periods, except for the period c. ad 300–800, despite significant differences in both data coverage and methodology. Rather than proving Mann was a fraud wh...