Norse survival in Greenland

What conditions could make it possible for the Norse Greenlanders (and by extension, the Vinlanders) to both survive and thrive in Greenland, instead of abandoning the colony and/or dying out? I'm currently making a conlang based around the scenario if the Norse Greenlanders managed to live to the present day, and need opinions on how this scenario could work out the best.
 
IIRC, there's some genetic evidence that a very few of the Norse inter-married...

Hmm.

IMHO, the pivot-point is their chaplains & priests holding those colonists to 'Christian' culture, clothing and diets, despite progressive collapse of their 'Medieval Warm Period' ecosystem, the shrinking growing season etc etc.

Had colonists embraced the indigenous folk's weather-appropriate life-style before the situation became 'unsustainable', they had a chance...
They didn't.
Game Over.
 
In regards to Vinland, one scenario I thought of is that the area is colonized earlier. Then, by the time the Medieval Warm Period ends, the colony could expand southward into land that is not too adversely affected by the Little Ice Age, though its contact with Europe is probably cut off.
 
Have the Danes/Norwegians be the main explorers of North America, but in the 15th century. Having someone like Didrik Pining make it to North America and find the Grand Banks and begin the colonisation of Newfoundland (Vinland, really). The earlier you go, the better chance you have at continuity with the remnants of the Greenland colony, which would have to have some use in the scheme of Denmark-Norway exploiting the Grand Banks. It'll get resettled (as much as you really can resettle Greenland before the potato is introduced to make things marginally less difficult) by mainly Icelanders, who will also likely be the main settlers of Vinland, at least in the early days.
 
Trade.

What kills the Greenland Norse is that eventually, all Trade has to be with Norway/Denmark. There's no trade between Greenland and Iceland allowed.

The problem is that when that happens, the distance and logistics make the Greenland trade uneconomic.

Greenland is reduced to trading luxury goods - Walrus ivory and hide, for which there's insufficient demand.

The colony dies on the vine.

Keep trade going with Iceland, and the Greenland Colony has enough communication to keep it inching along. In particular, the exchange with Iceland gives it boats. And boats are critical to the Greenland survival package.
 
What really decided the outcome of Norse Greenland was the infusion of african ivory which killed off greenland's biggest export (walrus/whale ivory). Prevent/delay african ivory from reaching europe and greenland still has a massive economic reason to exist.
 
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