There is an interesting history of the Viking Greenlanders. The author postulates that their disappearance was possibly due to the Portuguese (Basque?) recruiting of the limited number of Greenland males for fishing crews, and not so much climate change.
If there is any interest, I will do some more digging to find the title.
I’d be interested but I’m pretty sure they were overwhelmed by the “little Ice age”. The indigenous Inuit could handle the cold and hunt locally while the Vikings depended upon crops to survive and didn’t hunt whales & seals. The Vikings’ superiority was their ships. Once they were outnumbered on land, they could be pushed back to the sea as long as a tribe was willing to sustain high casualties.