Baffin IslandBarnes Ice Cap began regrowing 2,000 years ago, a Science study finds.
Warming ended growth by 1960, and none of the ice now sits above the snow line.
Cold-based ice froze onto bedrock, preserving moss that radiocarbon dating shows died as the margin advanced.
A full ice age was still tens of thousands of years off, lead author Nicolás Young says.
Young’s team may sample 2,000-year-old moss in 20 years, as the margin retreats.
How each outlet framed it
- Ars Technica
- reconstructs the Barnes Ice Cap as physical evidence that the Laurentide re-expanded ~2,000 years ago, before warming reversed it around 1960
Sources: Ars Technica