The study published Tuesday in the journal Nature Communications suggests that continued warming will push the AMOC over its “tipping point” … The shift would be as abrupt and irreversible and lead to dramatic changes in weather on either side of the Atlantic.

“This is a really worrying result,” said Peter Ditlevsen, a climate physicist at the University of Copenhagen and lead author of the new study. “This is really showing we need a hard foot on the brake” of greenhouse gas emissions.

The lawsuit she filed in November goes after a who’s who of the fossil fuel industry — Exxon Mobil, Chevron, Royal Dutch Shell, BP and others. Ms. Sims argues that since 1965, those companies have produced 40 percent of global greenhouse gas emissions, while at the same time colluding to deceive the public about the disastrous consequences of their actions.