ICE-3G is the most used model for correcting tide gauge data against PGR [15]. It's creators, Peltier and Tushingham were among the first scientists to make the linkage between global sea level rise and the Greenhouse Effect, claiming in 1989 that sea levels were rising at a rate in excess of 1 mm/yr [33].

The impression has been conveyed to the world's public, media, and policymakers, that the sea level rise of 18 cm in the past century is an observed quantity and therefore not open to much dispute. What is not widely known is that this quantity is largely the product of modeling, not observation, and thus very much open to dispute, especially as sea level data in many parts of the world fails to live up to the IPCC claims.