The current rate of global sea-level rise is 2-3 mm/year. To hit 1 m of sea-level rise in 2100 this rate should have to accelerate at least to 10 mm/year or faster at some point in th 21st century. While we await this to happen we may have a look at the un-smoothed monthly global sea-level data from satellite measurements. But before watching the data plot, think for a few seconds what you are expecting to see..
Global monthly mean sea-level from Topex-Poseidon-Jason, corrected for barometric effect and isostatic adjustment
I must confess that at first sight I was a bit surprised, and maybe you as well. I had seen the multi-yearly smoothed data often, and I did not expect that by eyeballing the acceleration in this period seems to be negative. A linear fit to a parabola yields a negative value of the quadratic term. The bootstrap confidence interval (5%-95%) of the linear fit suggest a possible development for the global sea-level in the next 10 years. Or perhaps the up-tick in the past 4 years will continue.
Do not take this too seriously. It is just a pastime while we wait.
The lines represent the bootstrap 5%-95% confidence interval of the mean response (no including residuals) . The calculation of the confidence intervals takes into account the full serial correlation structure of the regression residuals.
For those of you who may be wondering, this fit implies a 95% probability for 35 cm or less of sea-level rise in 2100.