I take it with a grain of salt because of the title including: "suggests"

And what's the projection, will it rise 0.5, 1, 2, 5, 100, 200 or 300 meters in the next 100 years? I have seen so many numbers, I don't know what the current estimation is. Anyway I tried to make sense of the article: " This number has hovered around 0.6 inches per decade since 1900...[]...Global sea level, the paper concluded, rose no less than 5.5 inches over the last century, and likely saw an increase of 6.7 inches."

lets see, 6.7 is likely. 6.7 / 10 = 0.67 inches per decade. and no less than 0.55 (lower than measured).