A peer-reviewed study documents the extremely warm temperatures of the Medieval Period that occurred in the California Sierra Nevada range. Scientists, working with dead tree trunks located above the current tree line, affirm California's Medieval extreme warm temperature history, which still remains unprecedented. Read about the full study here.
"Working with dead tree trunks located above the current treeline on tephra-covered slopes of Whitewing Mountain and San Joaquin Ridge.....the five researchers say "the Medieval forest on Whitewing was growing under mild, favorable conditions (warm with adequate moisture)," as indicated by "extremely low mean sensitivities [to stress] and large average ring widths." More specifically, they conclude, as reported in their abstract, that annual minimum temperatures during the Medieval Climatic Anomaly in the region they studied were "significantly warmer" (+3.2°C) "than present,".....Once again, we have another example of a paleoclimate study in which the Medieval Warm Period is determined to have been significantly warmer than it is currently....."
OK, if it was warmer during the MWP will out all those SUVs and Power Plants spewing CO2, can we conclude ti was not caused buy CO2? Perhaps it is part of natural cycle, like other exceptional warming periods over the last 5,000 years, including the Minoan Warm Period and Roman Warm Period. See how all three compare to the Modern Warm Period. [Click for a larger image]
H/T to C3 Headlnes for the tip.