MWP designates the Medieval Warm Period.
The Medieval Warm Period had completely vanished. Even the previously acknowledged ‘regional effect’ now left no trace in the record.(Our Beloved Bishop)
The idea is to show something like this:
Greenland. Vikings occupied Greenland until it started to get cold around—
☞ They left Greenland at least a century after it got cold, probably because the ivory market fell after Europeans rediscovered Africa.