[skymer]

The title understates the authors' actual claim: "We found ... that this event would have effectively been impossible without human-induced climate change."

If someone wants to take the time to read the whole 35-page study, it would be interesting to know whether "human-induced climate change" is now just a synonym for "climate change", or is part of their research.

[MCOfficer]

Unverified guess: it's to distinguish the rapid climate change happening since the 1850s from the slow, natural climate change that has been known to happen over millennia.