> This "medieval warm period" that doesn't look anywhere close to what we're going through Southern Greenland, England, Russian, and Norway were all growing wi

> This "medieval warm period" that doesn't look anywhere close to what we're going through Southern Greenland, England, Russian, and Norway were all growing wine grapes during the medieval warm period. Some people claim the medieval warm period was regional, but this seems to be misstated - 55th parallel north across the world. Wine was being made in England as far north as York, and in the Americas, in Southern Ontario. This calls into question the "regionalism" of the Medieval Warm Period. One of the biggest reasons that the MWP is called into question is because the Climate Models don't have a good understanding of why, and we think it may have had a lower CO2 amount than today (although ice core drilling has numerous scientific problems)