Al Gore Warmists fiddle historic sea level change data Past sea-level change is imagined downward. Therefore, sea level change is accelerating.

As with NOAA’s fiddling with historic temperature data, the past cannot be scientifically adjusted since the results cannot be confirmed.

The PNAS study is here.
https://junkscience.com/2017/05/warmists-fiddle-historic-sea-level-change-data/