The reconstruction provides a high-resolution representation of temperature patterns in the Roman and Medieval warm periods, but also shows the cold phases that occurred during the Migration Period and the later Little Ice
This is what global cooling really looks like – new tree ring study shows 2000 years of cooling – previous studies underestimated temperatures of Roman and Medieval Warm Periods
Click source to read FULL report from Anthony Watts
Also read:
Orbital forcing of tree-ring data - nature.com/nclimate/journal, and
Climate was HOTTER in Roman, medieval times than now: Study - Lewis Page, The Register