[Phantom Lord]

In the following century, accelerated sea level rise could happen if the Greenland ice sheet melts drastically or breaks up, affecting coastal communities globally.

You are giving the impression through your posts you know what you are talking about. So a question.

"Accelerated sea level rise" implies there is current sea level rise that will accelerate. Can you point out some areas where there has been a rise in the sea level in the past 20 years?

[cogitator]

"Accelerated sea level rise" implies there is current sea level rise that will accelerate. Can you point out some areas where there has been a rise in the sea level in the past 20 years?

Like everywhere? Current sea level rise is due mainly to thermal expansion of the oceans' waters.

Ocean Surface Topography from Space

Sea Level Change

Sea level in the Arctic

"A recent conference presentation at AGU (reported here) while confirming that global sea level is indeed rising (in line with other estimates), showed that Arctic sea levels may actually be falling. On the face of it these preliminary results are a little puzzling (though note that this isn't yet a properly peer reviewed paper, and so may not reflect what ends up in the journal), but it does reveal some of the complexities in analysing sea level in relatively small enclosed basins and so a brief overview of the different factors involved is probably useful."