Carbon Dioxide and Earth's Future Pursuing the ... - Magazooms

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parts of North America during the Medieval Warm Period was “comparable to or exceeds that
of the past one-to-two decades in some regions.”
So what happens when reconstructed temperature data are employed all the way from the
beginning to the end of the past millennium or so? In the data section of our website
(www.co2science.org), within what we call our Medieval Warm Period Project, we report the
results of a new and properly-prepared millennial temperature reconstruction for a different
part of the globe every single week. Some of these studies allow actual numerical values of
reconstructed temperature differentials between the peak warmth of the Medieval Warm
Period (MWP) and the peak warmth of the Current Warm Period (CWP) to be determined,
while others merely enable one to determine which of these periods was the warmer of the
two.
The results of these two sets of analyses are depicted in the two figures below, representing
many more locations than were employed by Mann et al. in deriving their original “hockey
stick” graph.
The distribution, in 0.5°C increments, of studies that allow one to identify the degree by which
peak Medieval Warm Period temperatures either exceeded (positive values, red) or fell short
of (negative values, blue) peak Current Warm Period temperatures.
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