was brutally clobbered by, and the overwhelming evidence of it one acquires a more profound loathing of Michael Mann et al who tried to erase it from climatology. I'm not sure why anyonymous cowards are arguing with this other than the fact that they might not want their real name associated with such willful ignorance of the facts so they have little choice but to do it anonymously. There was no global, synchronous MWP. Various regional warming *and cooling* events occurred over the span of about four centuries. The problem arising here is one of 'sceptics' misrepresenting the true nature of the regional Medieval Warm Period s and then claiming that a conspiracy of commie climate scientists is trying to 'get rid of the MWP'. In the sense 'sceptics' use the term, it never existed in the first place. Paleo reconstructions of the northern hemisphere have a lot more regional oscillations that tend to cancel. The MWP would be a SST event, kinda like the current Arctic sea ice melt. Most of the proxies with high correlation to sst show a warmer MWP and LIA. Even the Orsi et al, "Fresh Hockey Stick from the Southern Hemisphere" has MWP temperature indications that are not significantly different than today. Neukom et al Southern south American, same story. Whether the MWP and LIA were global and synchronous is debatable. What's not debatable is that as Arctic Sea Ice extent is diminishing global average temperature of the lower troposphere is declining. So Arctic