Those reactions are to the paper by 2 Danes, as covered in this article:
https://www.wired.com/story/amoc-collapse-atlantic-ocean/
HN discussion: https://news.ycombinator.com/item?id=41087977
https://www.wired.com/story/amoc-collapse-atlantic-ocean/
HN discussion: https://news.ycombinator.com/item?id=41087977