claim: With marine ice cliff instability, sea-level rise for the next century is potentially much larger than we thought it might be five or 10 years ago
evidence: For instance, a 2016 study led by Jim Hansen concluded that based on past climate change data, sea level rise could accelerate exponentially in the coming decades, with a doubling time of 10, 20 or 40 years, respectively, raising the ocean by several meters in 50, 100 or 200 years.