The findings are grounded in decades of satellite data, in situ measurements, and computer modelling.
Dr Ivins said: ”Satellite measurements provide prima facie, irrefutable evidence.”
The IPCC forecasts an approximate half-a-metre of sea level rise by 2100 under the middle-of-the-road emissions scenario.
If humanity defies the odds and achieves “carbon neutrality” by mid-century, meaning any remaining emissions are somehow offset, sea level will likely be capped at 43cm.
The “worst case” pathway, assuming carbon emissions continue unabated, or Earth itself will begin to boost greenhouse gas concentrations, would see an 84cm increase.