Authors: Q Z Yin, Z P Wu, A Berger, H Goose, D Hodel. (None familiar to me off hand, but recognizable - not fringe)
"Science", 2021 p. 1035, under "Paleoclimate",
heading "Insolation triggered abrupt weakening of Atlantic circulation at the end of interglacials"
That heading may confuse - the news is that they identified a probable tipping point or "threshold" level crossed by cyclically decreasing insolation, below which sea ice feedback from the Labrador and Nordic seas suddenly (in geo time) jumps the northern hemisphere climate to a different equilibrium state featuring high amplitude variations around a lower mean temperature (the glaciers and ice caps come back, the weather goes to extremes).
And that appears to be how interglacials have been ending over the past 800k years or so.
"The ubiquity of this threshold suggests its fundamental role in terminating the warm climate conditions at the end of interglacials" (from the abstract).