New research determines that South America did experience the Medieval Warming and temperatures were higher during MWP, contrary to Michael Mann's hockey stick "science"
Read here. As hundreds of scientists have discovered and published, the Medieval Warming (MWP) climate was global in nature, with temperatures that in many areas of the world were higher than today's temperatures.
Contrary to Michael Mann's now widely discredited hockey stick "science," the Neukom et al research found the MWP was a significant high temperature event in South America. This team of 18 highly qualified researchers came from 7 countries; they chose the best 22 climate proxies to reconstruct a thousand+ year temperature series. (click to enlarge chart)
"The international research team — composed of scientists from Argentina, Chile, Germany, Switzerland, The Netherlands, the United Kingdom and the United States — write that their summer temperature reconstruction suggests that “a warm period extended in SSA from 900 (or even earlier) to the mid-fourteenth century,” which they describe as being temporally located “towards the end of the Medieval Climate Anomaly as concluded from Northern Hemisphere temperature reconstructions.” And as can be seen from the figure below, the warmest decade of this Medieval Warm Period was calculated by them to be AD 1079-1088, which as best as can be determined from their graph is about 0.17°C warmer than the peak warmth of the Current Warm Period." [Neukom, R., Luterbacher, J., Villalba, R., Kuttel, M., Frank, D., Jones, P.D., Grosjean, M., Wanner, H., Aravena, J.-C., Black, D.E., Christie, D.A., D'Arrigo, R., Lara, A., Morales, M., Soliz-Gamboa, C., Srur, A., Urritia, R. and von Gunten, L. 2011: Climate Dynamics]