Patterson’s findings, published in March, suggest that Viking settlers in Iceland ran into trouble when a cool period hit around A.D. 970, just a few decades after they arrived.

帕特森的研究结果是在三月公布的，结果显示维京人在冰岛的定居者刚刚到来几十年后，大约在公元970年前后，一场严寒让他们陷入困境。

youdao

After Mr Webster reported his find to Ms Boughton, she identified it as Viking silver from the early medieval period, before passing it on for analysis.

BBC: Silverdale silver Viking hoard declared treasure

Known and studied since the 1970s beginning with NASA's Viking missions, such networks date from a period in Martian history when water flowed freely across the surface.

FORBES: Wall of Gale Crater

They are cooler than the "Medieval Warm Period" about 1, 000 years ago when Eric the Red and his Icelandic Viking tribe settled on grasslands of Greenland's southwestern coast, and much warmer than about 400 years ago when the Northern Hemisphere plunged into depths of a "Little Ice Age" (not a true Ice Age).

FORBES: Would a global warming really be that bad?