In the case of the Greenland Norse, they had trade with the mother country -- Norway -- and that trade dwindled: partly because Norway got weaker, partly because of sea ice between Greenland and Norway.
Grenlandski Nordijci trgovali su s matičnom zemljom, Norveškom, što je propalo dijelom zbog toga što je Norveška oslabila, a dijelom zbog morskog leda između Grenlanda i Norveške.