In order to use tidal gauges to reliably estimate global sea level changes, researchers have to successfully separate the components of shifting land heights and local sea level variability from any global trends. (globalwarmingsolved.com)
Second, the 20th century wasn't the only time period when temperature and global sea level changed together. (realclimate.org)
So, 9 ″ from sinking, 3 ″ from local changes and 5 ″ from global sea level change. (wattsupwiththat.com)