“Medieval Warm Period seen in western USA tree ring fire scars“. Anthony Watts darkly hints that “despite what some would like you to believe, the MWP was not a regional ‘non event’.” Then he copy-and-pastes a University of Arizona news release about how Giant Sequoias reveal fire histories in the Sierra Nevada. (I’ll try to ignore his reflexive figure comparing the global “Mann/IPCC” temperature history to the European “historical” temperature history.)
This is not a climate paper, it’s about historical fire frequencies and even implicitly recognizes the progression of global warming. You can read Multi-Millennial Fire History of the Giant Forest, Sequoia National Park, California, USA (Swetnam, et. al, 2009) at the Fire Ecology journal web site (abstract or PDF). Anthony didn’t.